CN105271323B - Coal ash alkali sintered clinker aluminium dissolving-out method and aluminium dissolution reaction method and aluminium dissolution slurries separation method and aluminum-extracted pulverized fuel ash method - Google Patents
Coal ash alkali sintered clinker aluminium dissolving-out method and aluminium dissolution reaction method and aluminium dissolution slurries separation method and aluminum-extracted pulverized fuel ash method Download PDFInfo
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- 239000002002 slurry Substances 0.000 title claims abstract description 327
- 238000004090 dissolution Methods 0.000 title claims abstract description 300
- 238000000034 method Methods 0.000 title claims abstract description 258
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 122
- 238000000926 separation method Methods 0.000 title claims abstract description 101
- 239000003513 alkali Substances 0.000 title claims abstract description 93
- 239000010883 coal ash Substances 0.000 title claims abstract description 44
- 239000002956 ash Substances 0.000 title claims abstract description 14
- 239000000446 fuel Substances 0.000 title claims abstract description 12
- 239000004411 aluminium Substances 0.000 title claims description 191
- 229910052782 aluminium Inorganic materials 0.000 title claims description 191
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 191
- 239000006185 dispersion Substances 0.000 claims abstract description 306
- 239000007788 liquid Substances 0.000 claims abstract description 206
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 190
- 239000007787 solid Substances 0.000 claims abstract description 82
- 239000000463 material Substances 0.000 claims abstract description 33
- ZZVUWRFHKOJYTH-UHFFFAOYSA-N diphenhydramine Chemical compound C=1C=CC=CC=1C(OCCN(C)C)C1=CC=CC=C1 ZZVUWRFHKOJYTH-UHFFFAOYSA-N 0.000 claims abstract 87
- 239000012752 auxiliary agent Substances 0.000 claims description 264
- 238000005245 sintering Methods 0.000 claims description 178
- 239000010881 fly ash Substances 0.000 claims description 97
- 229920001223 polyethylene glycol Polymers 0.000 claims description 95
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 92
- 239000002202 Polyethylene glycol Substances 0.000 claims description 78
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical group NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 76
- 239000006228 supernatant Substances 0.000 claims description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 44
- 239000007791 liquid phase Substances 0.000 claims description 39
- 229910052710 silicon Inorganic materials 0.000 claims description 39
- 239000010703 silicon Substances 0.000 claims description 39
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 36
- 238000002360 preparation method Methods 0.000 claims description 35
- 238000001914 filtration Methods 0.000 claims description 29
- 239000011344 liquid material Substances 0.000 claims description 29
- 239000013589 supplement Substances 0.000 claims description 29
- 239000006184 cosolvent Substances 0.000 claims description 25
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 22
- 239000002699 waste material Substances 0.000 claims description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 229920000642 polymer Polymers 0.000 claims description 15
- 239000000292 calcium oxide Substances 0.000 claims description 13
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 13
- 239000003245 coal Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 9
- 230000007062 hydrolysis Effects 0.000 claims description 8
- 238000006460 hydrolysis reaction Methods 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 150000001412 amines Chemical class 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 239000002243 precursor Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 45
- 238000004062 sedimentation Methods 0.000 abstract description 29
- 239000011343 solid material Substances 0.000 abstract description 23
- 238000012360 testing method Methods 0.000 description 132
- PCHPORCSPXIHLZ-UHFFFAOYSA-N diphenhydramine hydrochloride Chemical compound [Cl-].C=1C=CC=CC=1C(OCC[NH+](C)C)C1=CC=CC=C1 PCHPORCSPXIHLZ-UHFFFAOYSA-N 0.000 description 131
- 230000000052 comparative effect Effects 0.000 description 34
- 238000003756 stirring Methods 0.000 description 30
- 235000011121 sodium hydroxide Nutrition 0.000 description 29
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 28
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 27
- 230000000694 effects Effects 0.000 description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 22
- 239000002893 slag Substances 0.000 description 20
- 239000000378 calcium silicate Substances 0.000 description 19
- 229910052918 calcium silicate Inorganic materials 0.000 description 19
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 19
- 229920001451 polypropylene glycol Polymers 0.000 description 15
- 229910000019 calcium carbonate Inorganic materials 0.000 description 14
- -1 ethylidene, propylidene Chemical group 0.000 description 13
- 238000002156 mixing Methods 0.000 description 13
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 description 12
- 239000000377 silicon dioxide Substances 0.000 description 12
- 239000011734 sodium Substances 0.000 description 12
- 239000012071 phase Substances 0.000 description 11
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 10
- 229910052708 sodium Inorganic materials 0.000 description 10
- 239000007790 solid phase Substances 0.000 description 10
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 9
- 239000002245 particle Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 230000032258 transport Effects 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 7
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 229910052681 coesite Inorganic materials 0.000 description 7
- 229910052906 cristobalite Inorganic materials 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 229910052911 sodium silicate Inorganic materials 0.000 description 7
- 229910052682 stishovite Inorganic materials 0.000 description 7
- 229910052905 tridymite Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 6
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 6
- 229910052593 corundum Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 238000005119 centrifugation Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000004115 Sodium Silicate Substances 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
- DMEGYFMYUHOHGS-UHFFFAOYSA-N cycloheptane Chemical group C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 238000002386 leaching Methods 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 229910001388 sodium aluminate Inorganic materials 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 239000002585 base Substances 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical group CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- WJEIYVAPNMUNIU-UHFFFAOYSA-N [Na].OC(O)=O Chemical compound [Na].OC(O)=O WJEIYVAPNMUNIU-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- ZPFKRQXYKULZKP-UHFFFAOYSA-N butylidene Chemical group [CH2+]CC[CH-] ZPFKRQXYKULZKP-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- WJTCGQSWYFHTAC-UHFFFAOYSA-N cyclooctane Chemical group C1CCCCCCC1 WJTCGQSWYFHTAC-UHFFFAOYSA-N 0.000 description 2
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 description 2
- 229940043276 diisopropanolamine Drugs 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- JISVIRFOSOKJIU-UHFFFAOYSA-N hexylidene Chemical group [CH2+]CCCC[CH-] JISVIRFOSOKJIU-UHFFFAOYSA-N 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- RFPMGSKVEAUNMZ-UHFFFAOYSA-N pentylidene Chemical group [CH2+]CCC[CH-] RFPMGSKVEAUNMZ-UHFFFAOYSA-N 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 235000019795 sodium metasilicate Nutrition 0.000 description 2
- 229910001948 sodium oxide Inorganic materials 0.000 description 2
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- WUGQZFFCHPXWKQ-UHFFFAOYSA-N Propanolamine Chemical compound NCCCO WUGQZFFCHPXWKQ-UHFFFAOYSA-N 0.000 description 1
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000001118 alkylidene group Chemical group 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- GSQZHCAJRYVDRG-UHFFFAOYSA-N butan-1-ol;ethane-1,2-diamine Chemical compound NCCN.CCCCO GSQZHCAJRYVDRG-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- KBPLFHHGFOOTCA-UHFFFAOYSA-N caprylic alcohol Natural products CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 229940043237 diethanolamine Drugs 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000005227 gel permeation chromatography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229940102253 isopropanolamine Drugs 0.000 description 1
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
- MWKFXSUHUHTGQN-UHFFFAOYSA-N n-decyl alcohol Natural products CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 1
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N n-hexyl alcohol Natural products CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- OSFBJERFMQCEQY-UHFFFAOYSA-N propylidene Chemical group [CH]CC OSFBJERFMQCEQY-UHFFFAOYSA-N 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 210000000582 semen Anatomy 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
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Abstract
The invention discloses a kind of aluminum-extracted pulverized fuel ash method.This method is in coal ash alkali sintered clinker dissolution reaction, a certain amount of hydramine and/or water-soluble polymer are added into aqueous dispersions, it can improve the stability of aqueous dispersions, suppress the trend that solid material flocculates in aqueous dispersions, the efficiency and material for improving reaction transport smoothness；When the slurries for reacting to obtain to dissolution separate, hydramine and/or water-soluble polymer are introduced into slurries, the separation of solid and liquid performance of slurries can be improved, reduce separating energy consumption, more liquid can also be gone out by sedimentation separation simultaneously, so as to reduce the treating capacity of the separator such as plate and frame filter, separating energy consumption is further reduced.
Description
Technical field
The present invention relates to a kind of coal ash alkali sintered clinker aluminium dissolution reaction method and a kind of coal ash alkali sintered clinker aluminium
Dissolution slurries separation method, the invention further relates to a kind of coal ash alkali sintered clinker aluminium dissolving-out method, the invention further relates to
A kind of aluminum-extracted pulverized fuel ash method.
Background technology
Flyash is the fine ash for trapping to get off from the flue gas after coal combustion, is the larger industrial residue of Chinese current discharge capacity
One of.Containing a large amount of valuable elements in flyash, such as silicon and aluminium.Chinese bauxite resource is in short supply, seeks to substitute bauxite
Alumina producing resource it is very necessary, therefore aluminium is extracted from flyash, the comprehensive profit of flyash can not only be improved
With benefit, and it is also advantageous for the sustainable development of aluminum oxide industry.
The method of aluminium is extracted from flyash includes alkaline process, acid system and acid and alkali combination method.Carried using alkaline process from flyash
Take aluminium to include sintering step and dissolution step, in sintering step, by flyash and alkaline cosolvent (such as calcium oxide, calcium salt and
One or more in sodium salt) it is sintered, aluminium is transformed into soluble in water or dilute alkaline soln salt；In dissolution step, use
Water or dilute alkaline soln are by the aluminium dissolution in obtained sintered clinker, SiO2Then it is retained in solid slag Deng material, so as to by aluminium
Extracted from flyash.
Because silicone content is larger in flyash, in order to improve the utilization rate of silicon in flyash and reduce low value silicon-containing solid
Mass flow in waste residue amount and technical process, carry out proposing aluminium operation again after flyash generally is carried out into pre-desiliconizing.Pre-desiliconizing one
As be to be dissolved out the amorphous silicon in flyash with highly basic, aluminum oxide is retained in solid phase, so as to realize pre-desiliconizing.
Therefore, in the technique for extracting aluminium from flyash using alkaline process, it is related to multistep liquid-solid reaction.For liquid-solid reaction
Speech, the dispersion stabilization of solid in a liquid is improved, it is that raising reaction efficiency and material are defeated to suppress solid material Subsidence trend
Transport the key of smoothness.
At present, generally by the stirring efficiency improved in pre-desiliconizing reactor and sintered clinker reactor for leaching and/or
It is introduced into side line and plays circulation to improve the uniformity and stability of solid particle in the liquid phase in pre-desiliconizing reaction and process in leaching, such as
Change the rotating speed of the type of agitating paddle and/or raising agitating paddle in reactor；Introducing side line in reactor bottom makes in reactor
The solid serum recycle of liquid.But there is increase equipment investment cost and the deficiency of operation energy consumption in these methods.
In addition, for the liquid-solid reaction being related in flyash alkalinity extraction aluminium technique, obtained material needs are reacted
Separation of solid and liquid is carried out, but the mixture that respectively step liquid-solid reaction obtains is being used such as plate and frame filter typically in slurry
When energy-dissipating type separator is separated, separating energy consumption is high.
The content of the invention
During it is an object of the invention to solve to extract aluminium from flyash using alkaline process in existing following two problems
One or two：(1) in the process of liquid-solid reaction is related to, solid material is easy to settle, and influences reaction efficiency and material is defeated
The smoothness of fortune；(2) slurries that liquid-solid reaction obtains energy consumption when being separated is too high.
The present inventor has found in research process：For flyash alkalinity extraction aluminium technique dissolution step and
Speech, such as hydramine and/or the water-soluble polymer of polyethylene glycol can play under different dosages and improve the scattered of the solid mixed liquor of liquid
The effect of the settling efficiency of effect or the solid mixed liquor of raising liquid, therefore separate rank by adjusting the stage of reaction and corresponding product
The amount of hydramine and/or the water-soluble polymer such as polyethylene glycol in liquid stereoplasm liquid involved by section, can be effectively in the stage of reaction
Suppress the trend that settles of solid material in liquid stereoplasm liquid, improve the stability of slurries and smoothness that material transports, simultaneously
The efficiency of reaction can be effectively improved；It can then improve the separation of solid and liquid performance of slurries in separation phase, reduce separating energy consumption, together
When can also improve the settling properties of slurries, a big chunk liquid is just separated by the sedimentation without consumed energy, so as to effectively
Mitigate the burden of the separator such as plate and frame filter, further reduce the energy consumption needed for separation.Complete on this basis
The present invention.
According to the first aspect of the invention, the invention provides a kind of coal ash alkali sintered clinker aluminium dissolving-out method, institute
It is that this method includes following step obtained from flyash is sintered with least one alkaline cosolvent to state alkaline sintering clinker
Suddenly：
(1) the first aqueous dispersions are being enough from the alkaline sintering clinker to be reacted aluminium under conditions of dissolution, obtained
To dissolution slurries, first aqueous dispersions contain the alkaline sintering clinker, water, at least one auxiliary agent and optional alkali, institute
It is hydramine and/or water-soluble polymer to state auxiliary agent,
Wherein, the auxiliary agent in first aqueous dispersions is hydramine, relative to 100 parts by weight alkaline sintering clinkers, described
The content of auxiliary agent is not higher than 3.5 parts by weight in one aqueous dispersions；Or
Auxiliary agent in first aqueous dispersions is water-soluble polymer, described relative to 100 parts by weight alkaline sintering clinkers
The content of auxiliary agent is not higher than 3.5 parts by weight in first aqueous dispersions；Or
Auxiliary agent in first aqueous dispersions is hydramine and water-soluble polymer, ripe relative to 100 parts by weight alkaline sinterings
Expect, the total amount of auxiliary agent is not higher than 4 parts by weight in first aqueous dispersions；
(2) supplement addition hydramine and/or water-soluble polymer, hydramine and/or water-soluble polymeric into the dissolution slurries
The supplement addition of thing causes：
When auxiliary agent in the dissolution slurries is hydramine, relative to 100 parts by weight alkaline sintering clinkers, in the dissolution slurries
The content of auxiliary agent is more than 4 parts by weight；Or
It is described molten relative to 100 parts by weight alkaline sintering clinkers when auxiliary agent in the dissolution slurries is water-soluble polymer
Go out the content of auxiliary agent in slurries to be more than 4 parts by weight；Or
When auxiliary agent in the dissolution slurries is hydramine and water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers,
The content of auxiliary agent is more than 4.5 parts by weight in the dissolution slurries；
(3) the dissolution slurries progress separation of solid and liquid that with the addition of hydramine and/or water-soluble polymer will be supplemented, obtains containing aluminium liquid
Body material.
According to the second aspect of the invention, the invention provides a kind of coal ash alkali sintered clinker aluminium dissolving-out method, institute
It is that this method includes following step obtained from flyash is sintered with least one alkaline cosolvent to state alkaline sintering clinker
Suddenly：
(1) the first aqueous dispersions are being enough from the alkaline sintering clinker to be reacted aluminium under conditions of dissolution, obtained
To dissolution slurries, first aqueous dispersions contain the alkaline sintering clinker, water and optional alkali；
(2) at least one auxiliary agent is added into the dissolution slurries, the auxiliary agent is hydramine and/or water-soluble polymer,
The addition of hydramine and/or water-soluble polymer causes：
When auxiliary agent in the dissolution slurries is hydramine, relative to 100 parts by weight alkaline sintering clinkers, in the dissolution slurries
The content of auxiliary agent is more than 4 parts by weight；Or
It is described molten relative to 100 parts by weight alkaline sintering clinkers when auxiliary agent in the dissolution slurries is water-soluble polymer
Go out the content of auxiliary agent in slurries to be more than 4 parts by weight；Or
When auxiliary agent in the dissolution slurries is hydramine and water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers,
The content of auxiliary agent is more than 4.5 parts by weight in the dissolution slurries；
(3) the dissolution slurries that with the addition of hydramine and/or water-soluble polymer are subjected to separation of solid and liquid, obtain liquids containing aluminium
Material；
(4) isolate aluminium from the liquid material containing aluminium, obtain raffinate, the raffinate is diluted or to
Supplement addition hydramine and/or water-soluble polymer Posterior circle are used to prepare the first aqueous dispersions in the raffinate, so as to prepare
The first obtained aqueous dispersions contain at least one auxiliary agent, the dilute strength of the raffinate or the hydramine and/or water-soluble
The supplement addition of property polymer causes：
When the auxiliary agent prepared in the first obtained aqueous dispersions is hydramine, relative to 100 parts by weight alkaline sintering clinkers, prepare
The content of auxiliary agent is not higher than 3.5 parts by weight in the first obtained aqueous dispersions；Or
When the auxiliary agent prepared in the first obtained aqueous dispersions is water-soluble polymer, relative to 100 parts by weight alkaline sinterings
Clinker, the content of auxiliary agent is not higher than 3.5 parts by weight in the first aqueous dispersions for preparing to obtain；Or
When the auxiliary agent prepared in the first obtained aqueous dispersions is hydramine and water-soluble polymer, relative to 100 parts by weight
Alkaline sintering clinker, the total amount of auxiliary agent is not higher than 4 parts by weight in the first aqueous dispersions for preparing to obtain.
According to the dissolving-out method of one side of the invention, by adjusting the hydramine introduced in the stage of reaction and separation phase
And/or the amount of water-soluble polymer, the trend effect that solid material settles in the stage of reaction realizes suppression dispersion liquid, from
And the efficiency of reaction is improved, higher target product yield is obtained, simultaneously effective improves the smoothness that material transports；Separating
Stage then realizes the separation of solid and liquid performance for improving liquid stereoplasm liquid, reduces separating energy consumption, while can also realize and improve liquid stereoplasm liquid
The effect of settling efficiency, more liquid phases is separated by settling with solid phase, reduce the separation entered such as plate and frame filter
The inventory of device, further reduces separating energy consumption.
According to the dissolving-out method of second aspect of the present invention, hydramine and/or water-soluble polymer are introduced in dissolution slurries,
The separation of solid and liquid performance of liquid stereoplasm liquid can be improved, reduce separating energy consumption；Simultaneously, moreover it is possible to improve the settling efficiency of liquid stereoplasm liquid, make
More liquid phases are separated by settling with solid phase, are reduced the inventory for entering the separator such as plate and frame filter, are entered one
Step reduces separating energy consumption.Also, the liquid phase isolated from dissolution slurries is used to prepare the by this method through separating aluminium Posterior circle
One aqueous dispersions, so as to introduce hydramine and/or water-soluble polymer in the first aqueous dispersions, and by having isolated aluminium
The amount of hydramine and/or water-soluble polymer is adjusted in liquid phase, can be solid in the dissolution stage of reaction realizes suppression dispersion liquid
The trend effect that body material settles, so as to improve the efficiency of reaction, higher target product yield is obtained, simultaneously effective
Improve the smoothness that material transports.
According to the dissolving-out method of one side of the invention and second aspect, by adjusting the dissolution stage of reaction and separation
The amount of hydramine and/or water-soluble polymer in slurries involved by stage, while solve the stage of reaction and suppress solid material sedimentation
Solid material is promoted to settle the technical problem of the two contradictions each other with separation phase, and it is easy to operate, it is easy to implement.Separately
Outside, the hydramine of addition and water-soluble polymer can recycle with circulation liquid phase, reduce further the operation of the inventive method into
This.
According to the third aspect of the present invention, the invention provides a kind of coal ash alkali sintered clinker aluminium dissolution reaction side
Method, the alkaline sintering clinker are obtained from flyash is sintered with least one alkaline cosolvent, and this method includes will
First aqueous dispersions are being enough from the alkaline sintering clinker to be reacted aluminium under conditions of dissolution, obtain dissolution slurries, institute
State the first aqueous dispersions and contain the alkaline sintering clinker, water, at least one auxiliary agent and optional alkali, the auxiliary agent is hydramine
And/or water-soluble polymer,
Wherein, the auxiliary agent in first aqueous dispersions is hydramine, relative to 100 parts by weight alkaline sintering clinkers, described
The content of auxiliary agent is not higher than 3.5 parts by weight in one aqueous dispersions；Or
Auxiliary agent in first aqueous dispersions is water-soluble polymer, described relative to 100 parts by weight alkaline sintering clinkers
The content of auxiliary agent is not higher than 3.5 parts by weight in first aqueous dispersions；Or
Auxiliary agent in first aqueous dispersions is hydramine and water-soluble polymer, ripe relative to 100 parts by weight alkaline sinterings
Expect, the total amount of auxiliary agent is not higher than 4 parts by weight in first aqueous dispersions.
According to the dissolution reaction method of third aspect of the present invention, it can effectively suppress solid material in dispersion liquid and occur to sink
The trend of drop, the efficiency of reaction is improved, obtain higher target product yield, simultaneously effective raising material transports smooth
Property.
According to the fourth aspect of the present invention, the invention provides a kind of separation of coal ash alkali sintered clinker aluminium dissolution slurries
Method, the dissolution slurries are that this method is included at least one and helped obtained from the aluminium in alkaline sintering clinker is carried out into dissolution
In the presence of agent, the dissolution slurries are subjected to separation of solid and liquid, obtain liquid material containing aluminium, the auxiliary agent is hydramine and/or water-soluble
Property polymer；
Wherein, it is described molten relative to 100 parts by weight alkaline sintering clinkers when the auxiliary agent in the pre-desiliconizing slurries is hydramine
Go out the content of auxiliary agent in slurries to be more than 4 parts by weight；Or
It is described relative to 100 parts by weight alkaline sintering clinkers when auxiliary agent in the pre-desiliconizing slurries is water-soluble polymer
The content of auxiliary agent is more than 4 parts by weight in dissolution slurries；Or
It is ripe relative to 100 parts by weight alkaline sinterings when auxiliary agent in the pre-desiliconizing slurries is hydramine and water-soluble polymer
Expect, the content of auxiliary agent is more than 4.5 parts by weight in the dissolution slurries.
According to the separation method of the 4th aspect of the present invention, it can effectively improve the separation of solid and liquid performance of liquid stereoplasm liquid, drop
Low separating energy consumption, simultaneously, moreover it is possible to the settling efficiency of liquid stereoplasm liquid is improved, more liquid phases is separated by settling with solid phase,
The inventory for entering the energy expenditure type separator such as plate and frame filter is reduced, further reduces separating energy consumption.
According to the fifth aspect of the present invention, the invention provides a kind of aluminum-extracted pulverized fuel ash method, this method includes pre- de-
Silicon step, sintering step and dissolution step,
In the pre-desilication step, the second aqueous dispersions are reacted under pre-desiliconizing reaction condition, obtained pre- de-
Silicon slurries, second aqueous dispersions contain flyash and at least one alkali, and pre-desiliconizing slurries are carried out into separation of solid and liquid, obtained pre-
Desiliconization flyash and siliceous liquid material；
In the sintering step, the pre-desiliconizing flyash and at least one alkaline cosolvent are sintered, obtained
Alkaline sintering clinker；
In the dissolution step, the second aqueous dispersions containing the alkaline sintering clinker, water and optional alkali are existed
It is enough aluminium carrying out dissolution reaction under conditions of dissolution from alkaline sintering clinker, the slurries that dissolution is obtained carry out separation of solid and liquid,
Obtain liquid material containing aluminium and silicon-containing waste residue；
Wherein, the dissolution reaction is carried out using according to the dissolution reaction method of third aspect of the present invention, or dissolution
Used in step and separation of solid and liquid is carried out according to the separation method of the 4th aspect of the present invention, or the dissolution step uses basis
The dissolving-out method of one side of the invention is carried out, or the pre-desilication step is used according to the molten of second aspect of the present invention
Go out method progress.
Aluminium method is carried according to the 5th aspect of the present invention, higher reaction efficiency and/or lower separation can be obtained
Energy consumption.
Brief description of the drawings
Fig. 1 is a kind of preferred embodiment according to the aluminum-extracted pulverized fuel ash method of the present invention.
Fig. 2 is used to illustrate test case 1-5 result, be added in pre-desiliconizing reacts dispersion liquid various concentrations (0.0%,
0.2%th, during 0.4%, 0.6%, 0.8% and 50wt%PEG+50wt%MEA 1.0%) dispersion liquid with the time dispersive property
Curve map.
Fig. 3 is used to illustrate test case 6-10 result, be added in pre-desiliconizing reacts dispersion liquid various concentrations (0.0%,
0.2%th, 0.4%, 0.6%, 0.8% and 1.0%) MEA when dispersion liquid with the time dispersive property curve map.
Fig. 4 is used for the result for illustrating test case 11-15, is to add various concentrations in pre-desiliconizing reacts dispersion liquid
During (0.0%, 0.2%, 0.4%, 0.6%, 0.8% and 1.0%) PEG dispersion liquid with the time dispersive property curve map.
Fig. 5 is used for the result for illustrating test comparison example 1-3, is to add various concentrations in pre-desiliconizing reacts dispersion liquid
During (0.0%, 0.2%, 0.4% and 0.8%) PPG dispersion liquid with the time dispersive property curve map.
Fig. 6 is used for the result for illustrating test comparison example 4-6, is to add various concentrations in pre-desiliconizing reacts dispersion liquid
During (0.0%, 0.2%, 0.5% and 0.8%) sodium lignin sulfonate dispersion liquid with the time dispersive property curve map.
Fig. 7 is used for the result for illustrating test case 16-20, is to add various concentrations in the dispersion liquid of dissolution reaction
Dispersion liquid disperses with the time during (0.0%, 0.2%, 0.4%, 0.6%, 0.8% and 1.0%) 50wt%PEG+50wt%MEA
Performance chart.
Fig. 8 is used for the result for illustrating test case 21-25, is to add various concentrations in the dispersion liquid of dissolution reaction
During (0.0%, 0.2%, 0.4%, 0.6%, 0.8% and 1.0%) MEA dispersion liquid with the time dispersive property curve map.
Fig. 9 is used for the result for illustrating test case 26-30, is to add various concentrations in the dispersion liquid of dissolution reaction
During (0.0%, 0.2%, 0.4%, 0.6%, 0.8% and 1.0%) PEG dispersion liquid with the time dispersive property curve map.
Figure 10 is used for the result for illustrating test comparison example 7-9, is to add various concentrations in the dispersion liquid of dissolution reaction
During (0.0%, 0.2%, 0.5% and 1.0%) PPG dispersion liquid with the time dispersive property curve map.
Figure 11 is used for the result for illustrating test comparison example 10-12, is to add various concentrations in the dispersion liquid of dissolution reaction
During (0.0%, 0.2%, 0.5% and 1.0%) sodium lignin sulfonate dispersion liquid with the time dispersive property curve map.
Figure 12 is used for the result for illustrating test case 31-34, is to add various concentrations in the dispersion liquid of de-alkali reaction
During (0.0%, 0.2%, 0.4%, 0.6% and 1.0%) PEG dispersion liquid with the time dispersive property curve map.
Figure 13 is used for the result for illustrating test comparison example 13-16, is to add various concentrations in the dispersion liquid of de-alkali reaction
Dispersion liquid is bent with the dispersive property of time during (0.0%, 0.2%, 0.4%, 0.6% and 1.0%) 50wt%PEG+50wt%MEA
Line chart.
Figure 14 is used for the result for illustrating test comparison example 17-20, is to add various concentrations in the dispersion liquid of de-alkali reaction
During (0.0%, 0.2%, 0.4%, 0.6% and 0.8%) MEA dispersion liquid with the time dispersive property curve map.
Figure 15 is used for the result for illustrating test comparison example 21-24, is to add various concentrations in the dispersion liquid of de-alkali reaction
During (0.0%, 0.2%, 0.4%, 0.6% and 1.0%) PPG dispersion liquid with the time dispersive property curve map.
Figure 16 is used for the result for illustrating test comparison example 25-28, is to add various concentrations in the dispersion liquid of de-alkali reaction
During (0.0%, 0.2%, 0.4%, 0.6% and 1.0%) sodium lignin sulfonate dispersion liquid with the time dispersive property curve map.
Figure 17 is used for test case 35-39 and test case 40-44 result, for illustrating to compare between monoethanolamine and polyethylene glycol
The different influence to dispersive property of example, abscissa represents MEA content in figure, and ordinate represents that the solid in dispersion liquid is being measured
Cylinder in settling height and calculate the percentage of settling height and the total height of dispersion liquid.
Embodiment
It is " optional " to represent inessential, it can be understood as with or without or including or not include in the present invention." at least one
Kind " represent one or more kinds of.
In the present invention, hydramine refers to the organic matter for containing-OH and amino in molecular structure simultaneously, such as aliphatic hydramine.Institute
Stating amino includes-NH2And-NH2One or both of the H groups that are substituted with a substituent and are formed.
Specifically, the hydramine can be selected from hydramine shown in Formulas I, hydramine shown in Formula II and hydramine shown in formula III,
In Formulas I, R1For C2-C10Alkylidene, R2And R3For hydrogen or C1-C5Alkyl (be preferably C1-C5Alkyl)；
In Formula II and formula III, R4、R5、R7、R8And R9Respectively C1-C10Alkylidene, R6For hydrogen or C1-C5Alkyl it is (excellent
Elect C as1-C5Alkyl).
In Formulas I, R1Instantiation can include but is not limited to ethylidene, propylidene and its isomers, butylidene and its
Isomers, pentylidene and its isomers, hexylidene and its isomers, heptamethylene and its isomers, octamethylene and its isomers or
Decylene and its isomers.R1Preferably C2-C5Alkylidene.
In Formula II and formula III, R4、R5、R7、R8And R9Instantiation can each include but is not limited to methylene, sub- second
Base, propylidene and its isomers, butylidene and its isomers, pentylidene and its isomers, hexylidene and its isomers, heptamethylene
And its isomers, octamethylene and its isomers or decylene and its isomers.Preferably, R4、R5、R7、R8And R9Respectively C2-C5
Alkylidene.
In Formulas I, Formula II and formula III, R2、R3And R6Instantiation can each include but is not limited to hydrogen, methyl, ethyl,
Propyl group and its isomers, butyl and its isomers and amyl group and its isomers.In Formulas I, R2And R3In it is at least one be preferably
Hydrogen.
The instantiation of the hydramine can include but is not limited to：Monoethanolamine, diethanol amine, N methyldiethanol amine, three
Monoethanolamine, n-propanolamine, isopropanolamine, diisopropanolamine (DIPA), triisopropanolamine, n-butanol amine, isobutyl hydramine, ethylenediamine butanol,
Amylalcohol amine, hexanol amine, enanthol amine, octanol amine and decyl alcohol amine.
In the present invention, water-soluble polymer refers to dissolve to form solution or can be swelled to be formed in water in water
The polymer of stable dispersion liquid, such as polyethylene glycol.Because polypropylene glycol just has water solubility only when molecular weight is relatively low, because
This heretofore described water-soluble polymer does not include polypropylene glycol.
First, coal ash alkali sintered clinker aluminium dissolution reaction method of the invention
According to the present invention coal ash alkali sintered clinker aluminium dissolution reaction method, the alkaline sintering clinker be by flyash with
Obtained from least one alkaline cosolvent is sintered.
The flyash can be through pre-desiliconizing, can also be preferably preferred through pre-desiliconizing, i.e., described flyash without pre-desiliconizing
For pre-desiliconizing flyash.The method of the pre-desiliconizing can be conventional method, for example, can by flyash and at least one alkali and
Water is reacted under pre-desiliconizing reaction condition, and the slurries that reaction is obtained carry out separation of solid and liquid, so as to obtain pre-desiliconizing fine coal
Ash.Pre-desiliconizing is reacted and the separation of solid and liquid of pre-desiliconizing slurries can also use hereafter method for optimizing progress described in Part V, i.e.,
Pre-desiliconizing reaction and the separation of pre-desiliconizing slurries are carried out in the presence of hydramine and/or water-soluble polymer.The alkali can be each
Kind is enough the amorphous Si O in flyash2The alkali being dissolved out, preferably sodium hydroxide.The dosage of the alkali can basis
The property of flyash is selected.Usually, relative to 100 weight parts of fine coal ash, the dosage of the alkali can be 5-150 weight
Part, preferably 50-100 parts by weight.The temperature of pre-desiliconizing reaction can be carried out at a temperature of 80-140 DEG C.
The alkaline cosolvent can be the various cosolvents commonly used in flyash alkaline process sintering, such as can be selected from carbonic acid
Sodium, calcium oxide and the precursor (such as calcium carbonate) that calcium oxide can be formed under sintering condition.Preferably, the alkaline cosolvent
For sodium carbonate and calcium oxide and/or calcium carbonate.It is highly preferred that the alkaline cosolvent is sodium carbonate and calcium carbonate.The alkali
The dosage of property cosolvent can be selected according to the composition of flyash, be not particularly limited.Usually, flyash and alkaline auxiliary
The weight ratio of solvent can be 1：0.1-10；When the alkaline cosolvent is sodium carbonate and calcium carbonate, the flyash and carbon
The weight ratio of sour sodium can be 1：0.2-2, preferably 1：The weight ratio of 0.2-0.8, flyash and calcium carbonate can be 1：0.1-
5, preferably 1：0.8-1.2.
The temperature of the sintering can be conventional selection, typically can be 950-1250 DEG C.
According to the present invention coal ash alkali sintered clinker aluminium dissolution reaction method, including by the first aqueous dispersions be enough by
Aluminium is reacted from the alkaline sintering clinker under conditions of dissolution, obtains dissolution slurries, first aqueous dispersions are containing
Alkaline sintering clinker, water, at least one auxiliary agent and optional alkali are stated, the auxiliary agent is hydramine and/or water-soluble polymer.Hydramine
It may be used alone, can also be used in combination with water-soluble polymer, the dosage of hydramine and water-soluble polymer can be according to alcohol
Depending on amine and water-soluble polymer are single use or are applied in combination.
In one embodiment, the auxiliary agent in first aqueous dispersions is hydramine, relative to 100 parts by weight alkaline sinterings
Clinker, in first aqueous dispersions content of auxiliary agent be not higher than 3.5 parts by weight, preferably 0.05-3.5 parts by weight, it is more excellent
Elect 0.5-3 parts by weight, more preferably 1-2 parts by weight as.
In another embodiment, the auxiliary agent in first aqueous dispersions is water-soluble polymer, relative to 100 weights
Part alkaline sintering clinker is measured, the content of auxiliary agent is not higher than 3.5 parts by weight, preferably 0.05-3.5 weights in first aqueous dispersions
Part, more preferably 0.5-3.5 parts by weight, more preferably 1-3.5 parts by weight are measured, is still more preferably 2.5-3.2 weight
Part.
Although dissolution reaction is only carried out in the presence of water-soluble polymer or hydramine, it is also possible to obtain is suppressed the first moisture and is dissipated
The effect of dissolution efficiency occurs to settle and improve for solid material in liquid, but dissolution reaction in water-soluble polymer and
When being carried out in the presence of hydramine, in the case of remaining condition identical, the effect for preferably suppressing solid material sedimentation can be obtained
And obtain higher dissolution efficiency.Therefore, in dissolution step, preferably hydramine and water-soluble polymer are applied in combination.At this
In a kind of preferred embodiment of invention, the auxiliary agent in first aqueous dispersions is hydramine and/or water-soluble polymer, phase
For 100 parts by weight alkaline sintering clinkers, the total amount of auxiliary agent is not higher than 4 parts by weight in first aqueous dispersions, is preferably
0.05-4 parts by weight, more preferably 1-4 parts by weight, more preferably 1-3 parts by weight.In the preferred embodiment, from
The angle for further improving dispersion effect is set out, and the weight ratio of hydramine and water-soluble polymer can be 1：0.1-10, it is preferably
1：0.2-5, more preferably 1：0.4-2.5, more preferably 1：0.8-1.2.
According to the dissolution reaction method of the present invention, the hydramine is preferably monoethanolamine, can not only so be obtained preferably
Suppress the effect of solid material sedimentation and higher dissolution efficiency, and can further reduce running cost.Walked in dissolution
In rapid, the water-soluble polymer is preferably polyethylene glycol.The number-average molecular weight of the water-soluble polymer is preferably 200-
8000, more preferably 400-2000, more preferably 500-1000.Herein, number-average molecular weight is to use gel infiltration color
Spectrometry measure.
According to the present invention, although need to only introduce a certain amount of hydramine and/or a certain amount of water-soluble in the first aqueous dispersions
Property polymer can obtain the effect for preferably suppressing solid material sedimentation and obtain higher dissolution reaction efficiency, but also may be used
Can realize that the Combination of Methods for suppressing solid material sedimentation uses with other, such as：Using with more preferable mixing effect
Agitating paddle, improve mixing speed and circulated the material in reactor in the bottom of reactor introducing side line.
According to the coal ash alkali sintered clinker aluminium dissolution reaction method of the present invention, the particle diameter of the alkaline sintering clinker is preferably
150-250 μm, it can so obtain more preferable result of extraction.Conventional various methods can be used to make the particle diameter of alkaline sintering clinker
Within above range, such as alkaline sintering clinker can be ground, it is ripe so as to obtain the alkaline sintering with above-mentioned particle diameter
Material.
First aqueous dispersions can contain alkali, can also be free of alkali.Preferably, first aqueous dispersions contain
Alkali.The alkali can be the various alkali commonly used in alkaline sintering clinker aluminium process in leaching, such as can be sodium hydroxide and/or carbonic acid
Sodium.The dosage of the alkali can be conventional selection, the weight ratio preferably 1 of the alkaline sintering clinker and alkali：0.1-10, more preferably
For 1：5-10.
The dissolution can be carried out under normal conditions, be carried out preferably at a temperature of 70-90 DEG C.
The slurries that dissolution reacts to obtain can use conventional method to carry out separation of solid and liquid, so as to obtain liquid material containing aluminium.
The separation of solid and liquid can use it is conventional it is various can realize the method for separating solid matter from liquid, such as：
The combination of one or both of sedimentation, centrifugation and filtering above method, preferably filtering or sedimentation and/or centrifugation and filtering
Combination.The filtering can be carried out in such as filter of plate and frame filter.In addition, the separation of solid and liquid can also adopt
The separation method described with hereafter Part II is carried out.
2nd, alkaline sintering clinker aluminium dissolution slurries separation method of the invention
According to the alkaline sintering clinker aluminium dissolution slurries separation method of the present invention, the dissolution slurries are by alkaline sintering clinker
Aluminium carry out dissolution obtained from, the alkaline sintering clinker is that flyash is sintered with least one alkaline cosolvent and is obtained
Arrive.Described alkaline sintering clinker and preparation method thereof is identical with described in this paper Part I, is no longer described in detail herein.
According to the alkaline sintering clinker aluminium dissolution slurries separation method of the present invention, the dissolution slurries can use conventional method
Obtain, i.e., be enough from the alkaline sintering clinker to enter aluminium under conditions of dissolution with water by alkaline sintering clinker and optional alkali
Row reacts and obtained.The dissolution can be carried out in the presence of base, can not also be carried out in the presence of base, preferably in alkali
In the presence of carry out.The alkali can be the various alkali commonly used in alkaline sintering clinker aluminium process in leaching, such as can be sodium hydroxide
And/or sodium carbonate.The dosage of the alkali can be conventional selection, the weight ratio preferably 1 of the alkaline sintering clinker and alkali：0.1-
10, more preferably 1：5-10.The dissolution can be carried out under normal conditions, be carried out preferably at a temperature of 70-90 DEG C.It is described
The method that dissolution reaction can also describe according to this paper Part I is carried out.
According to the alkaline sintering clinker aluminium dissolution slurries separation method of the present invention, it is included in the presence of at least one auxiliary agent, will
The dissolution slurries carry out separation of solid and liquid, obtain liquid material containing aluminium, the auxiliary agent is hydramine and/or water-soluble polymer.Alcohol
Amine and water-soluble polymer may be used alone, can also be used in combination, and dosage can be according to hydramine and water-soluble polymer
Depending on exclusive use is still applied in combination.
In one embodiment, the auxiliary agent in the dissolution slurries is hydramine, ripe relative to 100 parts by weight alkaline sinterings
Material, the content of auxiliary agent is more than 4 parts by weight in the dissolution slurries, preferably 4-20 parts by weight, more preferably 4-10 parts by weight,
More preferably 4-6 parts by weight.
In another embodiment, the auxiliary agent in the dissolution slurries is water-soluble polymer, relative to 100 parts by weight
Alkaline sintering clinker, the content of auxiliary agent is more than 4 parts by weight in the dissolution slurries, preferably 4-20 parts by weight, more preferably 4-
10 parts by weight, more preferably 4-6 parts by weight.
In another embodiment, the auxiliary agent in the dissolution slurries is hydramine and water-soluble polymer, relative to 100
Parts by weight alkaline sintering clinker, the content of auxiliary agent is more than 4.5 parts by weight in the dissolution slurries, preferably 4.5-20 parts by weight,
More preferably 4.5-10 parts by weight, more preferably 5-8 parts by weight.In this embodiment, solid-liquid point is improved from further
Angle from performance is set out, the weight ratio preferably 1 of the hydramine and the water-soluble polymer：0.1-10, more preferably 1：
0.2-5, more preferably 1：1-2.5.
According to the dissolution slurries separation method of the present invention, the hydramine is preferably monoethanolamine, can not only so be obtained more
Good strainability and settling property, and can further reduce the running cost of the inventive method.The water-soluble polymeric
Thing is preferably polyethylene glycol.The preferred 200-8000 of number-average molecular weight of the water-soluble polymer, more preferably 400-2000, enters
One step is preferably 500-1000.
It is the dissolution slurry obtained using Part I methods described above in dissolution slurries according to the separation method of the present invention
During liquid, part hydramine and/or water-soluble polymer can derive from the hydramine and/or water-soluble poly added in dissolution course of reaction
Compound, addition hydramine and/or water-soluble polymer now need to be only supplemented into dissolution slurries；Conversely, in dissolution reaction not
It is when being carried out in the presence of hydramine and/or water-soluble polymer, then needs to add hydramine and/or water-soluble poly into dissolution slurries
Compound.
Dissolution slurries are subjected to separation of solid and liquid, obtain liquid material containing aluminium and leftover materials, aluminium is primarily present in described contain
In aluminium liquid phase, silicon is then primarily present in leftover materials, therefore the leftover materials also are referred to as into silicon-containing waste residue herein.It is described solid
Liquid separation can use it is conventional it is various can realize the method for separating solid matter from liquid, such as：Sedimentation, from
The combination of one or both of the heart and filtering above method, preferably filtering or the combination of sedimentation and/or centrifugation and filtering.Institute
Stating filtering can be carried out in such as filter of plate and frame filter.
The separation method of the present invention adds at least one auxiliary agent into dissolution slurries, on the one hand can improve liquid stereoplasm liquid
Separation of solid and liquid performance, reduce separating energy consumption；On the other hand the effect for the settling efficiency for improving liquid stereoplasm liquid can be realized, is made more
Liquid phase is separated by settling with solid phase, is reduced the inventory for entering the separator such as plate and frame filter, is further reduced
Separating energy consumption.
In a preferred embodiment, the separation of solid and liquid includes settling dissolution slurries and separating supernatant
Liquid, the liquid phase in remaining slurries is isolated, merges the supernatant and the liquid phase, obtain liquid material containing aluminium, it is preferred to use
Filter to isolate the liquid phase in remaining slurries.According to the preferred embodiment, a big chunk liquid is by need not in slurries
The sedimentation of consumed energy is separated, so as to greatly mitigate such as the energy-dissipating type separator of plate and frame filter
Burden, further reduces separating energy consumption.
Conventional various methods can be used to separate aluminium from the liquid material containing aluminium.Such as：Can by institute
State liquid material containing aluminium and carry out carbon point (that is, being passed through carbon dioxide), obtain the aluminium hydroxide and raffinate as solid phase.Isolate
Aluminium hydroxide be optionally calcined to obtain aluminum oxide.By it is described mutually carry out containing aluminium liquid carbon point before, as the case may be also
Conventional various methods can be used to carry out deep desilication, with the further purity for improving the aluminium hydroxide prepared.Isolate
The raffinate of aluminium hydroxide can recycle.
3rd, coal ash alkali sintered clinker aluminium dissolving-out method of the invention
According to the dissolving-out method, the alkaline sintering clinker and preparation method thereof of the present invention and phase described in this paper Part I
Together, no longer it is described in detail herein.
According to the first embodiment of the coal ash alkali sintered clinker aluminium dissolving-out method of the present invention, comprise the following steps：
(1) the first aqueous dispersions are being enough from the alkaline sintering clinker to be reacted aluminium under conditions of dissolution, obtained
To dissolution slurries, first aqueous dispersions contain the alkaline sintering clinker, water, at least one auxiliary agent and optional alkali, institute
It is hydramine and/or water-soluble polymer to state auxiliary agent,
Wherein, the auxiliary agent in first aqueous dispersions is hydramine, relative to 100 parts by weight alkaline sintering clinkers, the alcohol
The dosage of amine is not higher than 3.5 parts by weight；Or
Auxiliary agent in first aqueous dispersions is water-soluble polymer, described relative to 100 parts by weight alkaline sintering clinkers
The content of auxiliary agent is not higher than 3.5 parts by weight in first aqueous dispersions；Or
Auxiliary agent in first aqueous dispersions is hydramine and water-soluble polymer, ripe relative to 100 parts by weight alkaline sinterings
Expect, the total amount of auxiliary agent is not higher than 4 parts by weight in first aqueous dispersions；
(2) supplement addition hydramine and/or water-soluble polymer into dissolution slurries, hydramine and/or water-soluble polymer
Supplement addition causes：
When auxiliary agent in the dissolution slurries is hydramine, relative to 100 parts by weight alkaline sintering clinkers, in the dissolution slurries
The content of auxiliary agent is more than 4 parts by weight；Or
It is described molten relative to 100 parts by weight alkaline sintering clinkers when auxiliary agent in the dissolution slurries is water-soluble polymer
Go out the content of auxiliary agent in slurries to be more than 4 parts by weight；Or
When auxiliary agent in the dissolution slurries is hydramine and water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers,
The content of auxiliary agent is more than 4.5 parts by weight in the dissolution slurries；
(3) the dissolution slurries progress separation of solid and liquid that with the addition of hydramine and/or water-soluble polymer will be supplemented, obtains containing aluminium liquid
Body material.
According to the first embodiment, step (1) can use dissolution reaction method described in this paper Part I to carry out,
No longer it is described in detail herein.
According to the first embodiment, step (2) supplements hydramine and/or water-soluble polymer into dissolution slurries, with
The content of hydramine and/or water-soluble polymer in dissolution slurries is set to meet the requirement of separation method described in this paper Part II；Mend
Having filled the dissolution slurries of hydramine and/or water-soluble polymer can be consolidated according to solid-liquid separating method described in this paper Part II
Liquid separates, so as to obtain liquid material containing aluminium.It is preferred that dissolution slurries are settled, supernatant is separated, and isolates remaining slurry
Liquid phase in liquid, merge supernatant and the liquid phase, so as to obtain liquid material containing aluminium, residue is more preferably isolated by filtration out
Liquid phase in slurries.
According to the first embodiment, the isolated liquid material containing aluminium of step (3) separated aluminium therein it
Afterwards, the raffinate obtained can be circulated for the first aqueous dispersions in preparation steps (1), such hydramine and water-soluble polymer
It can also realize and recycle, so as to further reduce operating cost.Circulated in the raffinate for preparing described the
Before one aqueous dispersions, raffinate described in preferred pair is diluted or supplemented into the raffinate hydramine and/or water solubility
Polymer, so that the content of hydramine and/or water-soluble polymer meets to require in the first aqueous dispersions.
According to second of embodiment of the coal ash alkali sintered clinker aluminium dissolving-out method of the present invention, comprise the following steps：
(1) the first aqueous dispersions are being enough from the alkaline sintering clinker to be reacted aluminium under conditions of dissolution, obtained
To dissolution slurries, first aqueous dispersions contain the alkaline sintering clinker, water and optional alkali；
(2) at least one auxiliary agent is added into the dissolution slurries, the auxiliary agent is hydramine and/or water-soluble polymer,
The addition of hydramine and/or water-soluble polymer causes：
When auxiliary agent in the dissolution slurries is hydramine, relative to 100 parts by weight alkaline sintering clinkers, in the dissolution slurries
The content of auxiliary agent is more than 4 parts by weight；Or
It is described molten relative to 100 parts by weight alkaline sintering clinkers when auxiliary agent in the dissolution slurries is water-soluble polymer
Go out the content of auxiliary agent in slurries to be more than 4 parts by weight；Or
When auxiliary agent in the dissolution slurries is hydramine and water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers,
The content of auxiliary agent is more than 4.5 parts by weight in the dissolution slurries；
(3) the dissolution slurries that with the addition of hydramine and/or water-soluble polymer are subjected to separation of solid and liquid, obtain liquids containing aluminium
Material；
(4) isolate aluminium from the liquid material containing aluminium, obtain raffinate, the raffinate is diluted or to
Supplement addition hydramine and/or water-soluble polymer Posterior circle are used to prepare the first aqueous dispersions in the raffinate, so as to prepare
The first obtained aqueous dispersions contain at least one auxiliary agent, the dilute strength of the raffinate or the hydramine and/or water-soluble
The supplement addition of property polymer causes：
It is described relative to 100 parts by weight alkaline sintering clinkers when the auxiliary agent prepared in the first obtained aqueous dispersions is hydramine
The dosage of hydramine is not higher than 3.5 parts by weight；Or
When the auxiliary agent prepared in the first obtained aqueous dispersions is water-soluble polymer, relative to 100 parts by weight alkaline sinterings
Clinker, the content of auxiliary agent is not higher than 3.5 parts by weight in first aqueous dispersions；Or
When the auxiliary agent prepared in the first obtained aqueous dispersions is hydramine and water-soluble polymer, relative to 100 parts by weight
Alkaline sintering clinker, the total amount of auxiliary agent is not higher than 4 parts by weight in first aqueous dispersions.
According to second of embodiment, initial period, dissolution reaction is not depositing in hydramine and/or water-soluble polymer
In lower progress, hydramine and/or water-soluble polymer are added into dissolution slurries, the separation of solid and liquid performance of liquid stereoplasm liquid can be improved,
Reduce separating energy consumption；Simultaneously, moreover it is possible to improve the settling efficiency of liquid stereoplasm liquid, more liquid phases is separated by settling with solid phase
Open, reduce the inventory for entering the separator such as plate and frame filter, further reduce separating energy consumption；Also, by will be from
The processing Posterior circle that the liquid material containing aluminium isolated in dissolution slurries remove aluminium is used to prepare the first aqueous dispersions so that
Dissolution reaction is carried out in the presence of hydramine and/or water-soluble polymer, improves the dispersive property of the first aqueous dispersions.
According to second of embodiment, in step (2), the hydramine and/or water-soluble polymer that are added into dissolution slurries
Amount meet using separation method described in this paper Part II requirement；Step (3) can retouch according to this paper Part II
The solid-liquid separating method stated is carried out, and preferably settles dissolution slurries, separates supernatant, and isolates the liquid in remaining slurries
Phase, merge supernatant and the liquid phase, so as to obtain liquid material containing aluminium, be more preferably isolated by filtration out in remaining slurries
Liquid phase.
According to second of embodiment, the method for this paper Part II description can be used to be separated from liquid material containing aluminium
Go out silicon, raffinate is circulated for preparing the first aqueous dispersions, now raffinate is diluted or supplemented into raffinate
Hydramine/or water-soluble polymer are added, so as to prepare containing for hydramine in the first obtained aqueous dispersions and/or water-soluble polymer
Amount meets the requirement that dissolution described in this paper Part I is reacted.
4th, aluminum-extracted pulverized fuel ash method of the invention
According to the aluminum-extracted pulverized fuel ash method of the present invention, including pre-desilication step, sintering step and dissolution step,
In the pre-desilication step, the second aqueous dispersions are reacted under pre-desiliconizing reaction condition, obtained pre- de-
Silicon slurries, second aqueous dispersions contain flyash and at least one alkali, and pre-desiliconizing slurries are carried out into separation of solid and liquid, obtained pre-
Desiliconization flyash and siliceous liquid material；
In the sintering step, the pre-desiliconizing flyash and at least one alkaline cosolvent are sintered, obtained
Alkaline sintering clinker；
In the dissolution step, the second aqueous dispersions containing the alkaline sintering clinker, water and optional alkali are existed
It is enough aluminium carrying out dissolution reaction under conditions of dissolution from alkaline sintering clinker, the slurries that dissolution is obtained carry out separation of solid and liquid,
Obtain liquid material containing aluminium and silicon-containing waste residue；
Wherein, the dissolution reaction is carried out using the dissolution reaction method according to Part I of the present invention, or dissolution
The separation method according to Part II of the present invention is used to carry out separation of solid and liquid in step, or the dissolution step uses basis
Dissolving-out method described in the first embodiment of Part III of the present invention is carried out, or the pre-desilication step is used according to the present invention
Dissolving-out method described in second of embodiment of Part III is carried out.
Aluminium method is carried according to the present invention, in pre-desilication step, the alkali can be that various be enough will be non-in flyash
Crystalline state SiO2The alkali being dissolved out, preferably sodium hydroxide.The dosage of the alkali can be selected according to the property of flyash.
Usually, relative to 100 weight parts of fine coal ash, the dosage of the alkali can be 5-150 parts by weight, preferably 50-100 weight
Part.The temperature of the pre-desiliconizing reaction can be carried out at a temperature of 80-140 DEG C.
In a kind of preferred embodiment of the present invention, second aqueous dispersions also contain at least one auxiliary agent, institute
It is hydramine and/or water-soluble polymer to state auxiliary agent, and so can effectively suppress that solid material in liquid stereoplasm liquid settles becomes
Gesture, improves the stability of slurries and smoothness that material transports, while can effectively improve the efficiency of reaction.Hydramine and water-soluble
Property polymer may be used alone, can also be used in combination, and the dosage of hydramine and water-soluble polymer can be according to hydramine and water
Depending on soluble polymer is single use or is applied in combination.
In one embodiment, the auxiliary agent in second aqueous dispersions is hydramine, relative to 100 weight parts of fine coal
Ash, the content of auxiliary agent is not higher than 3.5 parts by weight, preferably 0.01-3.5 parts by weight in second aqueous dispersions, more preferably
0.5-3 parts by weight, more preferably 1-3 parts by weight, it is still more preferably 1-2 parts by weight.
In another embodiment, the auxiliary agent in second aqueous dispersions is water-soluble polymer, relative to 100 weights
Part flyash is measured, the content of auxiliary agent is not higher than 2.5 parts by weight, preferably 0.01-2.5 parts by weight in second aqueous dispersions,
More preferably 1-2 parts by weight.
It is obtained with suppressing the solids in the second aqueous dispersions although the auxiliary agent is water-soluble polymer or hydramine
Material occurs to settle and improves the effect of pre-desiliconizing reaction efficiency, but when the auxiliary agent is water-soluble polymer and hydramine,
In the case of remaining condition identical, more preferable anti-settling effect and Geng Gao pre-desiliconizing reaction efficiency can be obtained.Therefore, it is of the invention
The aluminium method that carries preferably hydramine and water-soluble polymer are applied in combination.
In a kind of preferred embodiment of the present invention, the auxiliary agent in second aqueous dispersions is hydramine and water solubility
Polymer, relative to 100 weight parts of fine coal ash, the total amount of auxiliary agent is not higher than 3.5 parts by weight in second aqueous dispersions, preferably
For 0.01-3.5 parts by weight, more preferably 0.5-3 parts by weight, more preferably 1-3 parts by weight.In the preferred embodiment
In, the weight ratio of hydramine and water-soluble polymer can be 1：0.1-20, preferably 1：0.2-5, more preferably 1：0.4-2.5,
More preferably 1：0.8-1.2.
Aluminium method is carried according to the present invention, the hydramine is preferably monoethanolamine, can not only so obtain and preferably suppress heavy
The effect of drop and higher pre-desiliconizing reaction efficiency, and can further reduce the running cost of the inventive method.It is described
Water-soluble polymer is preferably polyethylene glycol.The number-average molecular weight of the water-soluble polymer is preferably 200-8000, more preferably
For 400-2000, more preferably 500-1000.
Aluminium method is carried according to the present invention, although need to only introduce a certain amount of hydramine and/or one in the second aqueous dispersions
Quantitative water-soluble polymer can obtain the effect for preferably suppressing solid material sedimentation and obtain higher pre-desiliconizing reaction
Efficiency, but the present invention carry aluminium method can also with it is other can realize suppress solid material sedimentation Combination of Methods use,
Such as：Make instead using the agitating paddle with more preferable mixing effect, raising mixing speed and in the bottom of reactor introducing side line
The material in device is answered to be circulated.
The slurries that pre-desiliconizing reacts to obtain can use conventional method to carry out separation of solid and liquid, so as to obtain siliceous liquid material
And pre-desiliconizing flyash.The separation of solid and liquid can use conventional various can realize to separate solid matter from liquid
Method out, such as：The combination of one or both of sedimentation, centrifugation and filtering above method, preferably filters or settles
And/or the combination of centrifugation and filtering.The filtering can be carried out in such as filter of plate and frame filter.
In a preferred embodiment, before pre-desiliconizing slurries are carried out into separation of solid and liquid, of the invention carries aluminium side
Method also includes adding or supplementing into the pre-desiliconizing slurries adding at least one auxiliary agent, and the auxiliary agent is hydramine and/or water
It soluble polymer, on the one hand can so improve the separation of solid and liquid performance of slurries, reduce the energy consumption needed for separation of solid and liquid；The opposing party
Face can also improve the settling property of slurries so that and more slurries can be separated by the sedimentation method without energy, from
And the burden of the energy expenditure type separator such as plate and frame separator is reduced, further reduce separating energy consumption.Hydramine and water-soluble
Property polymer may be used alone, can also be used in combination, and the dosage of hydramine and water-soluble polymer can also be according to being independent
Depending on being still applied in combination.
In one embodiment, the auxiliary agent in pre-desiliconizing slurries is hydramine, described relative to 100 weight parts of fine coal ash
The content of auxiliary agent is more than 3.6 parts by weight preferably 3.6-20 parts by weight, more preferably 3.8-10 weight in pre-desiliconizing slurries
Part, more preferably 4-8 parts by weight.
In another embodiment, the auxiliary agent in pre-desiliconizing slurries is water-soluble polymer, relative to 100 parts by weight powder
Coal ash, the content of auxiliary agent is more than 3 parts by weight in the pre-desiliconizing slurries, preferably 3-20 parts by weight, more preferably 3.5-10
Parts by weight, more preferably 4-8 parts by weight.
In another embodiment, the auxiliary agent in pre-desiliconizing slurries is hydramine and water-soluble polymer, relative to 100 weights
Part flyash is measured, the content of auxiliary agent is more than 3.6 parts by weight in the pre-desiliconizing slurries, and preferably 3.6-20 parts by weight are more excellent
Elect 4-15 parts by weight as.In this embodiment, the weight ratio preferably 1 of the hydramine and the water-soluble polymer：0.1-
10, more preferably 1：0.5-2, more preferably 1：1-2.
Preferably, the separation of solid and liquid is at least carried out in the presence of at least one water-soluble polymer.
According to the pre-desiliconizing slurries separation method of the present invention, the hydramine is preferably monoethanolamine, can not only so be obtained
More preferable strainability and settling property, and can further reduce the running cost of the inventive method.The water-soluble poly
Compound is preferably polyethylene glycol.Number-average molecular weight preferred 200-8000, the more preferably 400-2000 of the water-soluble polymer,
More preferably 500-1000.
Whether the source of auxiliary agent can be according to the second aqueous dispersions containing auxiliary agent determination, described second in pre-desiliconizing slurries
When aqueous dispersions contain auxiliary agent, the part of auxiliary in pre-desiliconizing slurries can derive from the first aqueous dispersions, and remainder then leads to
Supplement addition is crossed to obtain；When the second aqueous dispersions are free of auxiliary agent, auxiliary agent is added directly into pre-desiliconizing slurries.
Aluminium method is carried according to the present invention, in a kind of preferred embodiment of pre-desilication step, second moisture
Dispersion liquid contains hydramine and/or water-soluble polymer, and into pre-desiliconizing slurries, supplement addition hydramine and/or water-soluble polymer are laggard
Row separation of solid and liquid, siliceous liquid phase and pre-desiliconizing flyash is obtained, isolate silicon from the siliceous liquid phase, and raffinate is circulated
For preparing the second aqueous dispersions.In another preferred embodiment of pre-desilication step, initial period dissolution is reacted not
Carried out in the presence of hydramine and/or water-soluble polymer, after adding hydramine and/or water-soluble polymer into pre-desiliconizing slurries
Separation of solid and liquid is carried out, phase containing aluminium liquid and pre-desiliconizing flyash is obtained, isolates silicon from the siliceous liquid phase, and raffinate is followed
Ring is used to prepare the second aqueous dispersions, so as to introduce hydramine and/or water-soluble polymer in the second aqueous dispersions.According to this two
Kind of preferred embodiment, recycling for hydramine and/or water-soluble polymer can be realized, further reduces the fortune of the present invention
Row cost.
It is in a preferred embodiment, pre- de- when pre-desiliconizing slurries also contain hydramine and/or water-soluble polymer
In silicon step, the separation of solid and liquid includes settling the slurries and separating supernatant, isolates the liquid in remaining slurries
Phase, pre-desiliconizing flyash is obtained, merge the supernatant and the liquid phase, obtain siliceous liquid material, it is preferred to use filtering point
Separate out the liquid phase in remaining slurries.According to the preferred embodiment, a big chunk liquid is by that need not consume energy in slurries
The sedimentation of amount is separated, so as to greatly mitigate the burden of the energy-dissipating type separator such as plate and frame filter,
Further reduce separating energy consumption.
Silicon substrate sheet in the siliceous liquid material exists in the form of silicate, the silicate can be transformed into two
Silica simultaneously isolates silica, and raffinate can then recycle.Conventional various methods can be used to turn silicate
Become silica, such as：It can use the method for carbon point that silicate is transformed into silica, i.e., into siliceous liquid material
Carbon dioxide is passed through, silicate is decomposed into silica and corresponding carbonate.
According to the aluminum-extracted pulverized fuel ash method of the present invention, the alkaline cosolvent can be to be commonly used in flyash alkaline process sintering
Various cosolvents, such as sodium carbonate, calcium oxide and precursor (such as carbon that calcium oxide can be formed under sintering condition can be selected from
Sour calcium).Preferably, the alkaline cosolvent is sodium carbonate and calcium oxide and/or calcium carbonate.It is highly preferred that the alkaline auxiliary
Solvent is sodium carbonate and calcium carbonate.The dosage of the alkaline cosolvent can be selected according to the composition of pre-desiliconizing flyash,
It is not particularly limited.Usually, the weight ratio of pre-desiliconizing flyash and alkaline cosolvent can be 1：0.1-10；In the alkalescence
When cosolvent is sodium carbonate and calcium carbonate, the weight ratio of pre-desiliconizing flyash and sodium carbonate can be 1：0.2-2, preferably 1：
The weight ratio of 0.2-0.8, pre-desiliconizing flyash and calcium carbonate can be 1：0.1-5, preferably 1：0.8-1.2.
The temperature of the sintering can be conventional selection, typically can be 950-1250 DEG C.
The particle diameter of the alkaline sintering clinker is preferably 150-250 μm, can so obtain more preferable result of extraction.It can adopt
The particle diameter for making alkaline sintering clinker with conventional various methods is within above range, such as can be ground alkaline sintering clinker
Mill, so as to obtain the alkaline sintering clinker with above-mentioned particle diameter.
Aluminium method is carried according to the present invention, the silicon-containing waste residue that dissolution step obtains can be handled using conventional method,
Further utilized with realizing.Because the silicon-containing waste residue that dissolution step obtains contains alkali, when silicon-containing waste residue is used for into some occasions,
Need to remove alkali therein.Therefore, it is of the invention to put forward aluminium method and include dealkalize step：In dealkalize step, it will contain
3rd aqueous dispersions of the silicon-containing waste residue, water and optional alkali are reacted under hydrolysising condition.
It is preferred that the silicon-containing waste residue is contacted with water and alkali, it can so obtain more preferable material and transport effect and filtering effect
Fruit.The species and dosage of the alkali can be conventional selection.Usually, the alkali can be sodium hydroxide.Relative to 100 weight
Part silicon-containing waste residue, the dosage of the alkali can be 10-100 parts by weight, preferably 40-80 parts by weight.The hydrolysis
It can be carried out at a temperature of 100-180 DEG C.
The hydrolysis is also a liquid-solid reaction.Preferably, the hydrolysis is at least one water-soluble polymeric
Carried out in the presence of thing, can so play suppression solid material and settle, improve the stability of solid 3rd aqueous dispersions of liquid,
So as to improve the effect of the smoothness of the efficiency of hydrolysis and material conveying.The water-soluble polymer is preferably poly- second two
Alcohol.The number-average molecular weight of the water-soluble polymer is preferably 200-8000, more preferably 400-2000, more preferably
500-1000.The number-average molecular weight is determined using gel permeation chromatography.The dosage of the water-soluble polymer can basis
The concentration of solid material is selected in reaction mass.Usually, relative to 100 parts by weight silicon-containing waste residues, the water-soluble poly
The dosage of compound can be 0.5-5 parts by weight, preferably 1-4 parts by weight, more preferably 1-3 parts by weight.
In dealkalize step, although only water-soluble polymer need to be introduced in the 3rd aqueous dispersions can obtain preferable suppression
The effect and higher hydrolysis efficiency that solid material processed settles, but solids can also be suppressed with other can realize
The Combination of Methods of material sedimentation uses, such as：Using the agitating paddle with more preferable mixing effect, raising mixing speed and reacting
The bottom of device, which introduces side line, is circulated the material in reactor.
Fig. 1 shows a kind of preferred embodiment for putting forward aluminium method according to the present invention, preferable to this referring to Fig. 1
Embodiment is described in detail.The preferred embodiment includes pre-desilication step, sintering step, dissolution step and dealkalize step
Suddenly.
In pre-desilication step, flyash, sodium hydroxide and a certain amount of hydramine and/or polyethylene glycol are dispersed in water
In, reacted under pre-desiliconizing reaction condition, by the amorphous Si O in flyash2Dissolution.Wherein, reacted in pre-desiliconizing
During the reaction that occurs mainly include：
SiO2(amorphous state)+2NaOH=Na2SiO3+H2O；
Al2O3+ 2NaOH=2NaAlO2+H2O。
Reacted by pre-desiliconizing, most of amorphous Si O in flyash2It is dissolved out, and it is most of in flyash
Al2O3Then it is retained in solid phase.Settled after supplementing hydramine and/or polyethylene glycol in the slurries for reacting to obtain to pre-desiliconizing, and
Supernatant is separated, remaining slurries are filtered, and obtain pre-desiliconizing flyash (that is, desiliconization flyash), merge supernatant and filtering
Obtained liquid phase, obtains sodium silicate solution, realizes the initial gross separation of sial.Wherein, pre-desiliconizing flyash enters in sintering step
It is sintered, sodium silicate solution isolates SiO therein by carbon2And carry out causticization and (that is, sodium carbonate therein is transformed into
Sodium hydroxide) Posterior circle use.
In sintering step, pre-desiliconizing flyash is mixed with calcium carbonate and sodium carbonate and is sintered, by pre-desiliconizing fine coal
Aluminium in ash is transformed into water miscible material, obtains alkaline sintering clinker.The reaction carried out in sintering step mainly includes：
Al2O3+Na2CO3=Na2O·Al2O3+CO2；
Fe2O3+Na2CO3=Na2O·Fe2O3+CO2；
SiO2+CaO+Na2CO3=Na2CaSiO4+CO2。
In dissolution step, by alkaline sintering clinker (that is, dry clinker), sodium hydroxide and a certain amount of hydramine and/or gather
Ethylene glycol is dispersed in water, and by the aluminium dissolution in alkaline sintering clinker, silicon then primarily enters solid phase.In the slurries obtained to dissolution
After supplementing hydramine and/or polyethylene glycol, settled and separate supernatant, remaining slurries are filtered, obtain calcium silicate slag, closed
And supernatant and the liquid phase being filtrated to get, obtain sodium aluminate solution.The reaction occurred in dissolution step mainly includes：
Na2O·Al2O3(Gu)+4H2O=2Na++2Al(OH)4 -；
Na2O·Fe2O3+4H2O=2NaOH+Fe2O3·3H2O。
Sodium aluminate solution can further carry out deep desilication, obtain sodium metaaluminate seminal fluid.Obtained sodium metaaluminate essence
Liquid carries out carbon point, after sodium metaaluminate is transformed into aluminium hydroxide, carries out separation of solid and liquid, the obtained aluminium hydroxide as solid phase enters
Aluminum oxide is obtained after row roasting.The supernatant isolated in sodium carbonate liquor and dissolution step that separation of solid and liquid obtains carries out severe
Change and sodium carbonate therein is transformed into the use of sodium hydroxide Posterior circle.
In dealkalize step, calcium silicate slag and a certain amount of polyethylene glycol that dissolution step is obtained mix with sodium hydroxide solution
Close, reaction is hydrolyzed, the alkali in calcium silicate slag is deviate from.The reaction occurred in dealkalize step mainly includes：
Na2CaSiO4+H2O+aq=Na2SiO3+Ca(OH)2+aq；
Na2SiO3+Ca(OH)2+H2O+aq=CaOSiO2·H2O+2NaOH+aq。
Dealkalize is obtained into mixture and carries out separation of solid and liquid, can obtain being adapted as the dealkalize calcium silicate slag of building material, is remained
Remaining liquid phase (that is, dealkalize liquid) can recycle after being cleaned.
According to the preferred embodiment, it can effectively suppress solid in pre-desiliconizing reaction, dissolution reaction and de-alkali reaction
The trend that body material settles, faster reaction rate and Geng Gao target can be obtained in the case of remaining condition identical
Product yield；And when material transports in pipeline, the probability settled reduces, and can reduce time dredged to pipeline
Number and/or the interval time extended between dredging；It then can effectively mitigate the burden of filter in separation phase, improve separation
Efficiency simultaneously reduces separating energy consumption.
The present invention is described in detail below in conjunction with test case and embodiment, but is not so limited the scope of the present invention.
The composition for the flyash that following test case and embodiment use is as shown in table 1.
Table 1 (by weight percentage)
| Numbering | SiO2 | TiO2 | Al2O3 | TFe2O3 | MnO | MgO | CaO | Na2O | K2O | P2O5 | Burn and lose | SO3 |
| A | 40.10 | 1.46 | 49.48 | 1.66 | 0.02 | 0.66 | 3.26 | 0.12 | 0.50 | 0.14 | 2.01 | 0.32 |
| B | 40.20 | 1.34 | 48.26 | 1.56 | 0.02 | 0.86 | 3.67 | 0.13 | 0.49 | 0.10 | 2.61 | 0.41 |
In following examples and comparative example, contained using silicon in method measure flyash specified in GB/T1574-2007
Amount, before and after dissolution in clinker in the content of aluminium and silicon-containing waste residue alkali content, desiliconization rate is calculated using below equation：
K=[(S0- S1)/S0] × 100%
Wherein：K-desiliconization rate,
S0Before-desiliconization in flyash silicon content,
S1After-desiliconization in flyash silicon content.
Dissolution rate is calculated using below equation：
L=[(A0- A1)/A0] × 100%
Wherein：L-dissolution rate,
A0Somehow the content of middle aluminium before-dissolution,
A1Somehow the content of middle aluminium after-dissolution.
Dealkalize rate is calculated using below equation：
N=[(C0- C1)/C0] × 100%
Wherein：N-dealkalize rate,
C0Before-dealkalize in silicon-containing waste residue alkali content,
C1After-dealkalize in silicon-containing waste residue alkali content.
The pre-desiliconizing reaction that embodiment 1-9 is used to illustrate in the pre-desilication step carried in aluminium method of the present invention.
Embodiment 1
By flyash A, monoethanolamine (that is, MEA), polyethylene glycol (that is, PEG, number-average molecular weight 600, purchased from Hai'an oil
Chemical company) and sodium hydroxide be dispersed in water, be uniformly mixing to obtain the second aqueous dispersions, wherein, it is flyash, monoethanolamine, poly-
The concentration of ethylene glycol and sodium hydroxide is listed in table 2.The temperature of second aqueous dispersions is increased to 90 DEG C, and at such a temperature
Stirring reaction 1 hour.The mixture that reaction obtains is filtered using plate and frame filter, it is (de- to obtain pre-desiliconizing flyash
Silicon rate is as shown in table 2) and the aqueous solution containing sodium metasilicate.
Embodiment 2-3
Flyash is carried out by pre-desiliconizing using method same as Example 1, unlike：Second is used only in embodiment 2
Hydramine；Polyethylene glycol is used only in embodiment 3.Experimental result is listed in table 2.
Comparative example 1-4
Flyash is carried out by pre-desiliconizing using method same as Example 1, unlike：In comparative example 1, what is used is poly-
The amount of ethylene glycol and monoethanolamine is as shown in table 2；In comparative example 2, with polypropylene glycol (number-average molecular weight 600, purchased from Hai'an oil
Chemical company) replace polyethylene glycol and monoethanolamine, dosage is as shown in table 2；In comparative example 3, (Hai'an is purchased from sodium lignin sulfonate
Petrochemical corporation (complex), number-average molecular weight 1124) replace polyethylene glycol and monoethanolamine, dosage is as shown in table 2；In comparative example 4, no
Use monoethanolamine and polyethylene glycol.Experimental result is listed in table 2.
Table 2
Embodiment 1-3 and comparative example 1-4's as a result, it was confirmed that by introducing a certain amount of hydramine in pre-desiliconizing reaction solution
And/or a certain amount of water-soluble polymer can improve the pre-desiliconizing rate of pre-desiliconizing reaction.Embodiment 1-3's as a result, it was confirmed that logical
Cross hydramine and water-soluble polymer being applied in combination and can obtain higher pre-desiliconizing rate.
Embodiment 4
By flyash B, monoethanolamine, polyethylene glycol (number-average molecular weight 1000, purchased from Hai'an petrochemical corporation (complex)) and hydrogen
Sodium oxide molybdena is dispersed in water, and is uniformly mixing to obtain the second aqueous dispersions, wherein, flyash, monoethanolamine, polyethylene glycol and hydroxide
The concentration of sodium is listed in table 3.The temperature of first aqueous dispersions is increased to 90 DEG C, and stirring reaction 1 hour at such a temperature.
The mixture that reaction obtains is filtered using plate and frame filter, obtains pre-desiliconizing flyash (desiliconization rate is as shown in table 3)
With the aqueous solution containing sodium metasilicate.
Embodiment 5 and 6
Flyash is carried out by pre-desiliconizing using method same as Example 4, unlike：Second is used only in embodiment 5
Hydramine, is used only polyethylene glycol in embodiment 6, and the dosage of monoethanolamine and polyethylene glycol is listed in table 3.Experimental result is in table 3
In list.
Embodiment 7-9
Flyash is carried out by pre-desiliconizing using method same as Example 4, unlike, poly- second two in embodiment 7-9
The dosage of alcohol and monoethanolamine difference is as shown in table 3.Experimental result is listed in table 3.
Table 3
Table 3 as a result, it was confirmed that using the present invention method to flyash carry out pre-desiliconizing, high pre-desiliconizing can be obtained
Rate.
Embodiment 10-17 is used to illustrate the pre-desiliconizing slurries separation side in the pre-desilication step for putting forward aluminium method of the present invention
Method.
Embodiment 10
Pre-desiliconizing slurries are prepared using method same as Example 1, monoethanolamine and poly- second are supplemented into pre-desiliconizing slurries
Glycol (number-average molecular weight 600, purchased from Hai'an petrochemical corporation (complex)), after supplement, monoethanolamine and poly- second two in pre-desiliconizing slurries
The content of alcohol is listed in table 4.After stirring, following two methods are respectively adopted and are separated：
Method one：Pre-desiliconizing slurries are sent into plate and frame filter and filtered, filtering energy consumption is listed in table 4；
Method two：Pre-desiliconizing slurries are stood 20 minutes, is settled, then separates supernatant, by raffinate sheet frame
Formula filter filters.Supernatant accounts for the percentage of the total amount of pre-desiliconizing slurries and filtering energy consumption is listed in table 4.
Comparative example 5
Pre-desiliconizing slurries are prepared using method same as in Example 10, following two methods are respectively adopted and are separated：
Method one：Pre-desiliconizing slurries are sent into plate and frame filter and filtered, filtering energy consumption is listed in table 4；
Method two：Pre-desiliconizing slurries are stood 20 minutes, supernatant are then separated, by raffinate plate and frame filter mistake
Filter.Supernatant accounts for the percentage of the total amount of pre-desiliconizing slurries and filtering energy consumption is listed in table 4.
Embodiment 11
Pre-desiliconizing slurries are prepared using with the identical method of comparative example 4, monoethanolamine and poly- second are added into pre-desiliconizing slurries
Glycol (number-average molecular weight 600, purchased from Hai'an petrochemical corporation (complex)), after addition, monoethanolamine and poly- second two in pre-desiliconizing slurries
The content of alcohol is listed in table 4.After stirring, pre-desiliconizing slurries are stood 20 minutes, is settled, then separates supernatant
Liquid, raffinate is filtered with plate and frame filter.Supernatant accounts for the percentage of the total amount of pre-desiliconizing slurries and filtering energy consumption exists
Listed in table 4.
Comparative example 6
Pre-desiliconizing slurries are prepared using with the identical method of comparative example 4, pre-desiliconizing slurries are then stood 20 minutes, carried out
Sedimentation, then separates supernatant, and raffinate is filtered with plate and frame filter.Supernatant accounts for the percentage of the total amount of pre-desiliconizing slurries
Than and filtering energy consumption listed in table 4.
Embodiment 12
Pre-desiliconizing slurries are prepared using method same as Example 2, monoethanolamine is supplemented into pre-desiliconizing slurries, are supplemented
Afterwards, the content of monoethanolamine is listed in table 4 in pre-desiliconizing slurries.After stirring, pre-desiliconizing slurries are stood 20 minutes, carried out
Sedimentation, then separates supernatant, and raffinate is filtered with plate and frame filter.Supernatant accounts for the percentage of the total amount of pre-desiliconizing slurries
Than being listed in table 4.
Embodiment 13
Pre-desiliconizing slurries are prepared using method same as Example 3, polyethylene glycol is supplemented into pre-desiliconizing slurries, and (number is equal
Molecular weight is 600, purchased from Hai'an petrochemical corporation (complex)), after supplement, the content of polyethylene glycol arranges in table 4 in pre-desiliconizing slurries
Go out.Stir, pre-desiliconizing slurries are stood 20 minutes, is settled, then separates supernatant, by raffinate plate and frame mistake
Filter filters.The percentage that supernatant accounts for the total amount of pre-desiliconizing slurries is listed in table 4.
Embodiment 14
Pre-desiliconizing slurries are prepared using method same as Example 4, monoethanolamine and poly- second are supplemented into pre-desiliconizing slurries
Glycol, after supplement, monoethanolamine and polyethylene glycol in pre-desiliconizing slurries (number-average molecular weight 1000, it is public purchased from Hai'an petrochemical industry
Department) content listed in table 4.After stirring, pre-desiliconizing slurries are stood 20 minutes, is settled, then separates supernatant
Liquid, raffinate is filtered with plate and frame filter.The percentage that supernatant accounts for the total amount of pre-desiliconizing slurries is listed in table 4.
Embodiment 15
Pre-desiliconizing slurries are prepared using method same as Example 4, monoethanolamine and poly- second are supplemented into pre-desiliconizing slurries
Glycol (number-average molecular weight 1000, purchased from Hai'an petrochemical corporation (complex)), after supplement, monoethanolamine and poly- second two in pre-desiliconizing slurries
The content of alcohol is listed in table 4.After stirring, pre-desiliconizing slurries are stood 20 minutes, is settled, then separates supernatant
Liquid, raffinate is filtered with plate and frame filter.The percentage that supernatant accounts for the total amount of pre-desiliconizing slurries is listed in table 4.
Embodiment 16
Using preparation pre-desiliconizing slurries same as Example 5, monoethanolamine is supplemented into pre-desiliconizing slurries, it is pre- de- after supplement
The content of monoethanolamine is listed in table 4 in silicon slurries.After stirring, pre-desiliconizing slurries are stood 20 minutes, settled, so
After separate supernatant, by raffinate with plate and frame filter filter.Supernatant accounts for the percentage of the total amount of pre-desiliconizing slurries in table 4
In list.
Embodiment 17
Using preparation pre-desiliconizing slurries same as Example 6, polyethylene glycol (number-average molecular weight is supplemented into pre-desiliconizing slurries
For 1000, purchased from Hai'an petrochemical corporation (complex)), after supplement, the content of polyethylene glycol is listed in table 4 in pre-desiliconizing slurries.Stir
After mixing uniformly, pre-desiliconizing slurries are stood 20 minutes, is settled, then separates supernatant, raffinate is filtered with plate and frame
Machine filters.The percentage that supernatant accounts for the total amount of pre-desiliconizing slurries is listed in table 4.
Table 4
*：On the basis of the filtering energy consumption of the method one of comparative example 5, the slippage of energy consumption is filtered；
**：On the basis of the filtering energy consumption of comparative example 6, the slippage of energy consumption is filtered.
Table 4 as a result, it was confirmed that by adding a certain amount of monoethanolamine and/or polyethylene glycol, a side in pre-desiliconizing slurries
Face can improve the strainability of pre-desiliconizing slurries, reduce the energy consumption of filter；On the other hand it is heavy then to effectively improve
Efficiency is dropped, so as to which more liquid phases be come out by sedimentation separation, mitigates the burden of filter, further reduces over filter device
Energy consumption.
Embodiment 18-27 is used for the dissolution reaction method for illustrating the present invention.
Embodiment 18
(1) sintering step
The pre-desiliconizing flyash that embodiment 1 obtains is mixed with calcium carbonate and sodium carbonate, 1 is sintered at a temperature of 1050 DEG C
Hour.Sintered product is ground to particle diameter within the scope of 150-250 μm in ball mill, so as to obtain alkaline sintering clinker.
Wherein, relative to 100 parts by weight pre-desiliconizing flyash, the dosage of calcium carbonate is 108 parts by weight, and the dosage of sodium carbonate is 34 weight
Part.
(2) dissolution step
Alkaline sintering clinker that step (1) is obtained, monoethanolamine, polyethylene glycol (number-average molecular weight 600, purchased from Hai'an stone
Oily chemical company) and sodium hydroxide be dispersed in water, stir, obtain the first aqueous dispersions, wherein, alkaline sintering clinker, second
The concentration of hydramine, polyethylene glycol and sodium hydroxide is listed in table 5.The temperature of first aqueous dispersions is increased to 85 DEG C, and
Stirring reaction 0.2 hour at this temperature.The aluminium dissolution slurries that reaction obtains are filtered using plate and frame filter, contained
There are the liquid phase and calcium silicate slag of sodium metaaluminate (dissolution rate is as shown in table 5).
Embodiment 19-20
Pre-desiliconizing flyash is sintered and dissolution using with the identical method of embodiment 18, unlike, dissolution step
In rapid, monoethanolamine is used only in embodiment 19, and polyethylene glycol is used only in embodiment 20.Experimental result is listed in table 5.
Comparative example 7-9
Pre-desiliconizing flyash is sintered and dissolution using with the identical method of embodiment 18, unlike, comparative example 7
In, the polyethylene glycol and the amount of monoethanolamine used is as shown in table 5；In comparative example 8, with polypropylene glycol (number-average molecular weight 600,
Purchased from Hai'an petrochemical corporation (complex)) replace polyethylene glycol and monoethanolamine；In comparative example 9, (Hai'an stone is purchased from sodium lignin sulfonate
Oily chemical company) replace polyethylene glycol and monoethanolamine.Experimental result is listed in table 5.
Comparative example 10
(1) using pre-desiliconizing flyash prepared by comparative example 4 being sintered with the identical method of embodiment 18, obtain alkali
Sintered clinker.
(2) the alkaline sintering clinker and sodium hydroxide obtained step (1) is dispersed in water, and is stirred, is obtained moisture and dissipate
Liquid, wherein, the concentration of alkaline sintering clinker and sodium hydroxide is listed in table 5.The temperature of aqueous dispersions is increased to 85 DEG C, and
Stirring reaction 0.2 hour at this temperature.The aluminium dissolution slurries that reaction obtains are filtered using plate and frame filter, contained
There are the liquid phase and calcium silicate slag of sodium metaaluminate (dissolution rate is as shown in table 5).
Embodiment 21
Using being sintered with the identical method of embodiment 18 to pre-desiliconizing flyash and dissolution, unlike, poly- second two
The amount of alcohol and monoethanolamine is as shown in table 5.Experimental result is listed in table 5.
Table 5
Embodiment 18-21 and comparative example 7-10 experimental result confirm, a certain amount of by being introduced in dissolution reaction solution
Hydramine and/or a certain amount of water-soluble polymer can improve dissolution reaction dissolution rate.Embodiment 18-20 experimental result
Confirm, higher pre-desiliconizing rate can be obtained by the way that hydramine and water-soluble polymer are applied in combination.
Embodiment 22
(1) sintering step
The pre-desiliconizing flyash that embodiment 4 obtains is mixed with calcium carbonate and sodium carbonate, 1 is sintered at a temperature of 1050 DEG C
Hour.Sintered product is ground to particle diameter within the scope of 150-250 μm in ball mill, so as to obtain alkaline sintering clinker.
Wherein, relative to 100 parts by weight pre-desiliconizing flyash, the dosage of calcium carbonate is 108 parts by weight, and the dosage of sodium carbonate is 34 weight
Part.
(2) dissolution step
Alkaline sintering clinker that step (1) is obtained, monoethanolamine, polyethylene glycol (number-average molecular weight 1000, purchased from Hai'an stone
Oily chemical company) and sodium hydroxide be dispersed in water, stir, obtain the first aqueous dispersions, wherein, alkaline sintering clinker, second
The concentration of hydramine, polyethylene glycol and sodium hydroxide is listed in table 6.The temperature of first aqueous dispersions is increased to 85 DEG C, and
Stirring reaction 0.2 hour at this temperature.The aluminium dissolution slurries that reaction obtains are filtered using plate and frame filter, contained
There are the liquid phase and calcium silicate slag of sodium metaaluminate (dissolution rate is as shown in table 6).
Embodiment 23 and 24
Using being sintered with the identical method of embodiment 22 to pre-desiliconizing flyash and dissolution, unlike, embodiment
Monoethanolamine is used only in 23 dissolution steps, and dosage is as shown in table 6；Polyethylene glycol, dosage and reality is used only in the dissolution step of embodiment 24
It is as shown in table 6 to test result.
Embodiment 25-27
Using being sintered with the identical method of embodiment 22 to pre-desiliconizing flyash and dissolution, unlike, embodiment
The dosage of monoethanolamine and polyethylene glycol difference is as shown in table 6 in 25-27.Experimental result is listed in table 6.
Table 6
Embodiment 22-27's as a result, it was confirmed that using the present invention preferable dissolving-out method coal ash alkali sintered clinker is entered
Row dissolution, higher dissolution rate can be obtained.
Embodiment 28-35 is used for the dissolution slurries separation method for illustrating the present invention.
Embodiment 28
Aluminium dissolution slurries are prepared using with the identical method of embodiment 18, monoethanolamine and poly- second are supplemented into aluminium dissolution slurries
Glycol (number-average molecular weight 600, purchased from Hai'an petrochemical corporation (complex)), after supplement, monoethanolamine and poly- second two in aluminium dissolution slurries
The content of alcohol is listed in table 7.Stir, aluminium dissolution slurries stood 20 minutes, is settled, then separates supernatant,
Raffinate is filtered with plate and frame filter.The percentage that supernatant accounts for the total amount of aluminium dissolution slurries is listed in table 7.
Embodiment 29
Aluminium dissolution slurries are prepared using with the identical method of comparative example 10, monoethanolamine and poly- second are added into aluminium dissolution slurries
Glycol (number-average molecular weight 600, purchased from Hai'an petrochemical corporation (complex)), after addition, monoethanolamine and poly- second two in aluminium dissolution slurries
The content of alcohol is listed in table 7.Stir, following two methods are respectively adopted and are separated：
Method one：Slurries are sent into plate and frame filter and filtered, filtering energy consumption is listed in table 7；
Method two：Aluminium dissolution slurries are stood 20 minutes, is settled, then separates supernatant, by raffinate sheet frame
Formula filter filters.The percentage that supernatant accounts for the total amount of aluminium dissolution slurries is listed in table 7.
Comparative example 11
Aluminium dissolution slurries are prepared using with the identical method of comparative example 10, following two methods are respectively adopted and are separated：
Method one：Slurries are sent into plate and frame filter and filtered, filtering energy consumption is listed in table 7；
Method two：Aluminium dissolution slurries are stood 20 minutes, is settled, then separates supernatant, by raffinate sheet frame
Formula filter filters.Supernatant accounts for the percentage of the total amount of aluminium dissolution slurries, and when the rate of filtration is listed in table 7.
Embodiment 30
Aluminium dissolution slurries are prepared using with the identical method of embodiment 19, monoethanolamine is supplemented into aluminium dissolution slurries, are supplemented
The content of monoethanolamine is listed in table 7 in aluminium dissolution slurries afterwards.Stir, aluminium dissolution slurries are stood 20 minutes, sunk
Drop, then separates supernatant, and raffinate is filtered with plate and frame filter.Supernatant accounts for the percentage of the total amount of aluminium dissolution slurries
Listed in table 7.
Embodiment 31
Aluminium dissolution slurries are prepared using with the identical method of embodiment 20, polyethylene glycol (number is supplemented into aluminium dissolution slurries
Average molecular weight is 600, purchased from Hai'an petrochemical corporation (complex)), the content of polyethylene glycol arranges in table 7 in aluminium dissolution slurries after supplement
Go out.Stir, aluminium dissolution slurries are stood 20 minutes, is settled, then separates supernatant, by raffinate plate and frame mistake
Filter filters.The percentage that supernatant accounts for the total amount of aluminium dissolution slurries is listed in table 7.
Embodiment 32
Aluminium dissolution slurries are prepared using with the identical method of embodiment 22, monoethanolamine and poly- second are supplemented into aluminium dissolution slurries
Glycol (number-average molecular weight 1000, purchased from Hai'an petrochemical corporation (complex)), after supplement, monoethanolamine and poly- second two in aluminium dissolution slurries
The content of alcohol is listed in table 7.Stir, aluminium dissolution slurries stood 20 minutes, is settled, then separates supernatant,
Raffinate is filtered with plate and frame filter.The percentage that supernatant accounts for the total amount of aluminium dissolution slurries is listed in table 7.
Embodiment 33
Aluminium dissolution slurries are prepared using with the identical method of embodiment 22, monoethanolamine and poly- second are supplemented into aluminium dissolution slurries
Glycol (number-average molecular weight 1000, purchased from Hai'an petrochemical corporation (complex)), after supplement, monoethanolamine and poly- second two in aluminium dissolution slurries
The content of alcohol is listed in table 7.Stir, aluminium dissolution slurries stood 20 minutes, is settled, then separates supernatant,
Raffinate is filtered with plate and frame filter.The percentage that supernatant accounts for the total amount of aluminium dissolution slurries is listed in table 7.
Embodiment 34
Aluminium dissolution slurries are prepared using with the identical method of embodiment 23, monoethanolamine is supplemented into aluminium dissolution slurries, are supplemented
Afterwards, the content of monoethanolamine is listed in table 7 in aluminium dissolution slurries.Stir, aluminium dissolution slurries are stood 20 minutes, sunk
Drop, then separates supernatant, and raffinate is filtered with plate and frame filter.Supernatant accounts for the percentage of the total amount of aluminium dissolution slurries
Listed in table 7.
Embodiment 35
Aluminium dissolution slurries are prepared using with the identical method of embodiment 24, polyethylene glycol (number is supplemented into aluminium dissolution slurries
Average molecular weight is 1000, purchased from Hai'an petrochemical corporation (complex)), after supplement in aluminium dissolution slurries the content of polyethylene glycol in table 7
List.Stir, aluminium dissolution slurries are stood 20 minutes, is settled, then separates supernatant, by raffinate plate and frame
Filter filters.The percentage that supernatant accounts for the total amount of aluminium dissolution slurries is listed in table 7.
Table 7
*：On the basis of the filtering energy consumption of the method one of comparative example 11, the slippage of energy consumption is filtered
Embodiment 28-35 and comparative example 11 introduce monoethanolamine and/or poly- second into aluminium dissolution slurries as a result, it was confirmed that passing through
It glycol, on the one hand can improve the strainability of slurries, reduce the energy consumption of filter；On the other hand it is heavy to effectively improve
Efficiency is dropped, so as to which more liquid phases be come out by sedimentation separation, mitigates the burden of filter, further reduces over filter device
Energy consumption.
Embodiment 36-38 is used to illustrate the dealkalize step in the aluminum-extracted pulverized fuel ash method of the present invention.
Embodiment 36
Calcium silicate slag, polyethylene glycol and the sodium hydroxide mixing that embodiment 18 is obtained are dispersed in water, and are uniformly mixing to obtain
3rd aqueous dispersions, wherein, calcium silicate slag, polyethylene glycol (number-average molecular weight 1000, purchased from Hai'an petrochemical corporation (complex)) and hydrogen
The concentration of sodium oxide molybdena is listed in table 8.The temperature of 3rd aqueous dispersions is increased to 160 DEG C, and stirring reaction 1 at such a temperature
Hour.The mixture that reaction obtains is filtered using plate and frame filter, obtains dealkalize calcium silicate slag (the dealkalize rate such as institute of table 8
Show).
Comparative example 12-15
Dealkalize is carried out to calcium silicate slag using with the identical method of embodiment 36, unlike, the second of the equivalent of comparative example 12
Hydramine replaces polyethylene glycol, comparative example 13 with the polypropylene glycol of equivalent (number-average molecular weight 1000, it is public purchased from Hai'an petrochemical industry
Department) polyethylene glycol is replaced, comparative example 14 replaces polyethylene glycol with the sodium lignin sulfonate of equivalent, and comparative example 15 is without using poly- second two
Alcohol.Experimental result is listed in table 8.
Embodiment 37
Calcium silicate slag, the polyethylene glycol (number-average molecular weight 600, purchased from Hai'an petrochemical corporation (complex)) that embodiment 22 is obtained
It is dispersed in water with sodium hydroxide mixing, is uniformly mixing to obtain the 3rd aqueous dispersions, wherein, calcium silicate slag, polyethylene glycol and hydrogen-oxygen
The concentration for changing sodium is listed in table 8.The temperature of 3rd aqueous dispersions is increased to 160 DEG C, and stirring reaction 1 is small at such a temperature
When.The mixture that reaction obtains is filtered using plate and frame filter, obtains dealkalize calcium silicate slag (the dealkalize rate such as institute of table 8
Show).
Comparative example 16
Dealkalize is carried out to calcium silicate slag using with the identical method of embodiment 37, unlike, the dosage such as table 8 of polyethylene glycol
It is shown.Experimental result is listed in table 8.
Embodiment 38
Dealkalize is carried out to calcium silicate slag using with the identical method of embodiment 37, unlike, the dosage such as table 8 of polyethylene glycol
It is shown.Experimental result is listed in table 8.
Table 8
Embodiment 36-38 and comparative example 12-17's as a result, it was confirmed that introducing a certain amount of polyethylene glycol in de-alkali reaction liquid
Dealkalize rate can be improved.
Test case 1-15
By flyash A and monoethanolamine (that is, MEA) and/or polyethylene glycol, (that is, PEG, number-average molecular weight 600, is purchased from
Hai'an petrochemical corporation (complex)) it is added in sodium hydrate aqueous solution, stirred at a temperature of 90 DEG C 60 minutes and form dispersion liquid, its
In, the content of flyash is 20 weight %, and the content of sodium hydroxide is 15 weight %.Dispersion liquid is placed in 100mL graduated cylinder,
The regular hour is stood, settling height of the solid in graduated cylinder in dispersion liquid is observed and calculates the total of settling height and dispersion liquid
The percentage of height, the percentage is bigger, illustrates that dispersiveness is better, on the contrary then illustrate that sedimentation effect is better.In test case 1-15,
The addition of monoethanolamine and polyethylene glycol is listed in table 9.Determine under equal conditions but do not add monoethanolamine and poly- second two
Settling height of the solid in graduated cylinder in the dispersion liquid that alcohol obtains simultaneously calculates the percentage of settling height and the total height of dispersion liquid
It is used for compareing.
Test comparison example 1-6
Test comparison example 1-6 uses to be carried out with test case 1-15 identicals method, and simply test comparison example 1-6 is without using second
Hydramine and polyethylene glycol, but use polypropylene glycol (that is, PPG, number-average molecular weight 600, purchased from Hai'an petrochemical corporation (complex))
Or sodium lignin sulfonate, addition are listed in table 9.
Table 9
| Numbering | MEA/wt% | PEG/wt% | MEA+PEG/wt% | PPG/wt% | Sodium lignin sulfonate/wt% |
| Test case 1 | 0.1 | 0.1 | 0.2 | / | / |
| Test case 2 | 0.2 | 0.2 | 0.4 | / | / |
| Test case 3 | 0.3 | 0.3 | 0.6 | / | / |
| Test case 4 | 0.4 | 0.4 | 0.8 | / | / |
| Test case 5 | 0.5 | 0.5 | 1.0 | / | / |
| Test case 6 | 0.2 | / | 0.2 | / | / |
| Test case 7 | 0.4 | / | 0.4 | / | / |
| Test case 8 | 0.6 | / | 0.6 | / | / |
| Test case 9 | 0.8 | / | 0.8 | / | / |
| Test case 10 | 1.0 | / | 1.0 | / | / |
| Test case 11 | / | 0.2 | 0.2 | / | / |
| Test case 12 | / | 0.4 | 0.4 | / | / |
| Test case 13 | / | 0.6 | 0.6 | / | / |
| Test case 14 | / | 0.8 | 0.8 | / | / |
| Test case 15 | / | 1.0 | 1.0 | / | / |
| Test comparison example 1 | / | / | / | 0.2 | / |
| Test comparison example 2 | / | / | / | 0.4 | / |
| Test comparison example 3 | / | / | / | 0.8 | / |
| Test comparison example 4 | / | / | / | / | 0.2 |
| Test comparison example 5 | / | / | / | / | 0.5 |
| Test comparison example 6 | / | / | / | / | 0.8 |
Figure 3 illustrates test case 11-15's figure 2 illustrates, test case 6-10 result for test case 1-5 result
As a result figure 4 illustrates test comparison example 1-3 result is in fig. 5 it is shown that test comparison example 4-6 result is shown in figure 6
Go out.
Fig. 2-6 is compared as can be seen that monoethanolamine and/or polyethylene glycol are added in aqueous dispersions, in addition
When relatively low, the trend that solid material settles can be substantially reduced；Improving the dosage of monoethanolamine and polyethylene glycol can then improve
The effect of settling of dispersion liquid.Therefore, it is possible to the stage of reaction in pre-desiliconizing adds a small amount of monoethanolamine and/or polyethylene glycol, drop
The trend that solid material settles during low reaction, monoethanolamine and/or poly- second two then can be accordingly improved in separation phase
The addition of alcohol, on the one hand improve the separation of solid and liquid performance of slurries, reduce the energy consumption of energy-dissipating type equipment for separating liquid from solid；On the other hand
More liquid phases can be gone out by sedimentation separation, remaining slurries are filtered, to mitigate the burden of filter, further dropped
The energy consumption of low filter.
Test case 16-30
The alkaline sintering clinker prepared using the step of embodiment 18 (1), it forms as shown in table 10.
Table 10 (by weight percentage)
| SiO2 | TiO2 | Al2O3 | TFe2O3 | MnO | MgO | CaO | Na2O | K2O | P2O5 | Burn and lose | SO3 |
| 10.06 | 0.78 | 21.19 | 0.83 | 0.13 | 0.52 | 9.70 | 42.11 | 0.00 | 0.045 | 14.2 | 0.08 |
By alkaline sintering clinker and monoethanolamine and/or polyethylene glycol (number-average molecular weight 600, purchased from Hai'an petrochemical industry
Company) add in sodium hydrate aqueous solution, form dispersion liquid within 15 minutes in 85 DEG C of stirrings, wherein, the content of alkaline sintering clinker is
20 weight %, the content of sodium hydroxide is 2 weight %.Dispersion liquid is placed in 100mL graduated cylinder, stands the regular hour, is seen
Examine settling height of the solid in dispersion liquid in graduated cylinder and calculate the percentage of settling height and the total height of dispersion liquid, this hundred
Point ratio is bigger, and it is dispersed better illustrate, on the contrary then illustrate that sedimentation effect is better.In test case 16-30, monoethanolamine and polyethylene glycol
Addition listed in table 11.Determine under equal conditions but do not add in the dispersion liquid that monoethanolamine and polyethylene glycol obtain
Settling height of the solid in graduated cylinder and calculate the percentage of settling height and the total height of dispersion liquid as compareing.
Test comparison example 7-18
Test comparison example 7-18 uses to be carried out with test case 16-30 identicals method, unlike, test comparison example 7-18
Without using monoethanolamine and polyethylene glycol, but use polypropylene glycol (number-average molecular weight 600, purchased from Hai'an petrochemical corporation (complex))
Or sodium lignin sulfonate (being purchased from Hai'an petrochemical corporation (complex)), addition is listed in table 11.
Table 11
| Numbering | MEA/wt% | PEG/wt% | MEA+PEG/wt% | PPG/wt% | Sodium lignin sulfonate/wt% |
| Test case 16 | 0.1 | 0.1 | 0.2 | / | / |
| Test case 17 | 0.2 | 0.2 | 0.4 | / | / |
| Test case 18 | 0.3 | 0.3 | 0.6 | / | / |
| Test case 19 | 0.3 | 0.3 | 0.8 | / | / |
| Test case 20 | 0.5 | 0.5 | 1.0 | / | / |
| Test case 21 | 0.2 | / | 0.2 | / | / |
| Test case 22 | 0.4 | / | 0.4 | / | / |
| Test case 23 | 0.6 | / | 0.6 | / | / |
| Test case 24 | 0.8 | / | 0.8 | / | / |
| Test case 25 | 1.0 | / | 1.0 | / | / |
| Test case 26 | / | 0.2 | 0.2 | / | / |
| Test case 27 | / | 0.4 | 0.4 | / | / |
| Test case 28 | / | 0.6 | 0.6 | / | / |
| Test case 29 | / | 0.8 | 0.8 | / | / |
| Test case 30 | / | 1.0 | 1.0 | / | / |
| Test comparison example 7 | / | / | / | 0.2 | / |
| Test comparison example 8 | / | / | / | 0.5 | / |
| Test comparison example 9 | / | / | / | 1.0 | / |
| Test comparison example 10 | / | / | / | / | 0.2 |
| Test comparison example 11 | / | / | / | / | 0.5 |
| Test comparison example 12 | / | / | / | / | 1.0 |
Figure 7 illustrates figure 8 illustrates test case 26-30 for test case 21-25 result for test case 16-20 result
Result figure 9 illustrates figure 10 illustrates test comparison example 10-12 result is in Figure 11 for test comparison example 7-9 result
In show.
Fig. 7-12 is compared as can be seen that being added in the aqueous dispersions of the dissolution process of alkaline sintering clinker a certain amount of
Monoethanolamine and/or polyethylene glycol, when addition is relatively low, the dispersion stabilization of dispersion liquid can be effectively improved, hence it is evident that drop
The trend that low solid material settles；The dosage of raising monoethanolamine and polyethylene glycol can then improve the sedimentation effect of dispersion liquid
Fruit.Therefore, a small amount of monoethanolamine and/or polyethylene glycol are added in the stage of reaction of dissolution, reduces solid material in course of reaction and send out
The trend of raw sedimentation, the addition of monoethanolamine and/or polyethylene glycol then can be accordingly improved in separation phase, on the one hand improves slurry
The separation of solid and liquid performance of liquid, reduce the energy consumption of energy-dissipating type equipment for separating liquid from solid；On the other hand can be gone out by sedimentation separation more
Liquid phase, remaining slurries are filtered, to mitigate the burden of filter, further reduce over the energy consumption of filter.
Test case 31-34 is used to illustrate the dealkalize step in the aluminum-extracted pulverized fuel ash method of the present invention.
The calcium silicate slag obtained using the step of embodiment 18 (2), it forms as shown in table 12.
Table 12 (by weight percentage)
| SiO2 | TiO2 | Al2O3 | TFe2O3 | CaO | Na2O |
| 27.53 | 2.01 | 1.88 | 2.21 | 28.57 | 27.05 |
Calcium silicate slag and polyethylene glycol (number-average molecular weight 600, purchased from Hai'an petrochemical corporation (complex)) are added to hydrogen-oxygen
Change in sodium water solution, dispersion liquid is formed within 60 minutes in 160 DEG C of stirrings, wherein, the content of calcium silicate slag is 20 weight %, sodium hydroxide
Content be 12 weight %.Dispersion liquid is placed in 100mL graduated cylinder, stands the regular hour, observes the solid in dispersion liquid
Settling height in graduated cylinder simultaneously calculates the percentage of settling height and the total height of dispersion liquid, and the percentage is bigger, illustrates point
Scattered property is better, on the contrary then illustrate that sedimentation effect is better.In test case 31-34, the addition of polyethylene glycol is listed in table 13.Survey
Settling height and calculating of the solid in graduated cylinder in determining under equal conditions but not adding the dispersion liquid that polyethylene glycol obtains
Settling height is used as with the percentage of the total height of dispersion liquid and compareed.
Test comparison example 13-28
Test comparison example 13-28 uses to be carried out with test case 31-34 identicals method, and simply test comparison example 13-16 makes
With monoethanolamine and polyethylene glycol (number-average molecular weight 600, purchased from Hai'an petrochemical corporation (complex)), test comparison example 17-20 is used
Monoethanolamine, test comparison example 21-24 use polypropylene glycol (number-average molecular weight 600, purchased from Hai'an petrochemical corporation (complex)), test
Comparative example 25-28 uses sodium lignin sulfonate.
Table 13
| Numbering | MEA/wt% | PEG/wt% | PPG/wt% | Sodium lignin sulfonate/wt% |
| Test case 31 | / | 0.2 | / | / |
| Test case 32 | / | 0.4 | / | / |
| Test case 33 | / | 0.6 | / | / |
| Test case 34 | / | 1.0 | / | / |
| Test comparison example 13 | 0.1 | 0.1 | / | / |
| Test comparison example 14 | 0.2 | 0.2 | / | / |
| Test comparison example 15 | 0.3 | 0.3 | / | / |
| Test comparison example 16 | 0.5 | 0.5 | / | / |
| Test comparison example 17 | 0.2 | / | / | / |
| Test comparison example 18 | 0.4 | / | / | / |
| Test comparison example 19 | 0.6 | / | / | / |
| Test comparison example 20 | 0.8 | / | / | / |
| Test comparison example 21 | / | / | 0.2 | / |
| Test comparison example 22 | / | / | 0.4 | / |
| Test comparison example 23 | / | / | 0.6 | / |
| Test comparison example 24 | / | / | 1.0 | / |
| Test comparison example 25 | / | / | / | 0.2 |
| Test comparison example 26 | / | / | / | 0.4 |
| Test comparison example 27 | / | / | / | 0.6 |
| Test comparison example 28 | / | / | / | 1.0 |
Figure 12 illustrates figure 13 illustrates test for test comparison example 13-16 result for test case 31-34 result
Figure 14 illustrates figure 15 illustrates test comparison example 25- for test comparison example 21-24 result for comparative example 17-20 result
28 result figure 16 illustrates.
It can be seen that to be effectively reduced using the method for the present invention from Figure 12-16 result and improve in dealkalize step
The dispersion stabilization of the solid dispersion liquid of liquid.
Test case 35-39
By flyash A and monoethanolamine and/or polyethylene glycol (number-average molecular weight 600, purchased from Hai'an petrochemical industry public affairs
Department) add in sodium hydrate aqueous solution, wherein, flyash A content is 20 weight %, and the content of sodium hydroxide is 15 weights
Measure %.Stirring forms dispersion liquid in 60 minutes, and dispersion liquid is placed in 100mL graduated cylinder, stands 20 minutes, observes in dispersion liquid
Settling height of the solid in graduated cylinder simultaneously calculates the percentage of settling height and the total height of dispersion liquid, and the percentage is bigger, says
Bright dispersiveness is better.In test case 37-41, the addition of monoethanolamine and polyethylene glycol is listed in table 14.Experimental result is being schemed
Shown in 17.
Table 14
| Numbering | MEA/wt% | PEG/wt% | MEA+PEG/wt% |
| Test case 35 | 0 | 0.6 | 0.6 |
| Test case 36 | 0.18 | 0.42 | 0.6 |
| Test case 37 | 0.3 | 0.3 | 0.6 |
| Test case 38 | 0.42 | 0.18 | 0.6 |
| Test case 39 | 0.6 | 0 | 0.6 |
Test case 40-44
(number-average molecular weight is alkaline sintering clinker and monoethanolamine and/or polyethylene glycol prepared by the step of embodiment 18 (1)
600, purchased from Hai'an petrochemical corporation (complex)) be added in sodium hydrate aqueous solution, stir 15 minutes and form dispersion liquid, wherein, alkali
The content of sintered clinker is 20 weight %, and the content of sodium hydroxide is 2 weight %.Dispersion liquid is placed in 100mL graduated cylinder, it is quiet
Put 20 minutes, observe settling height of the solid in graduated cylinder in dispersion liquid and calculate settling height and the total height of dispersion liquid
Percentage, the percentage is bigger, illustrates that dispersiveness is better.In test case 40-44, the addition of monoethanolamine and polyethylene glycol is in table
Listed in 15.Experimental result figure 17 illustrates.
Table 15
| Numbering | MEA/wt% | PEG/wt% | MEA+PEG/wt% |
| Test case 40 | 0 | 0.6 | 0.6 |
| Test case 41 | 0.18 | 0.42 | 0.6 |
| Test case 42 | 0.3 | 0.3 | 0.6 |
| Test case 43 | 0.42 | 0.18 | 0.6 |
| Test case 44 | 0.6 | 0 | 0.6 |
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (71)
1. a kind of coal ash alkali sintered clinker aluminium dissolving-out method, the alkaline sintering clinker is by flyash and at least one alkaline auxiliary
Obtained from solvent is sintered, this method comprises the following steps：
(1) the first aqueous dispersions are being enough from the alkaline sintering clinker to be reacted aluminium under conditions of dissolution, obtained molten
Go out slurries, first aqueous dispersions contain the alkaline sintering clinker, water, at least one auxiliary agent and optional alkali, described to help
Agent is hydramine and/or water-soluble polymer, wherein, the auxiliary agent in first aqueous dispersions is hydramine, relative to 100 parts by weight
Alkaline sintering clinker, the content of auxiliary agent is not higher than 3.5 parts by weight in first aqueous dispersions；Or
Auxiliary agent in first aqueous dispersions is water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers, described first
The content of auxiliary agent is not higher than 3.5 parts by weight in aqueous dispersions；Or
Auxiliary agent in first aqueous dispersions is hydramine and water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers, institute
The total amount for stating auxiliary agent in the first aqueous dispersions is not higher than 4 parts by weight；
(2) supplement addition hydramine and/or water-soluble polymer into the dissolution slurries, hydramine and/or water-soluble polymer
Supplement addition causes：
When auxiliary agent in the dissolution slurries is hydramine, relative to 100 parts by weight alkaline sintering clinkers, auxiliary agent in the dissolution slurries
Content to be more than 4 parts by weight；Or
When auxiliary agent in the dissolution slurries is water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers, the dissolution slurry
The content of auxiliary agent is more than 4 parts by weight in liquid；Or
It is described relative to 100 parts by weight alkaline sintering clinkers when auxiliary agent in the dissolution slurries is hydramine and water-soluble polymer
The content of auxiliary agent is more than 4.5 parts by weight in dissolution slurries；
(3) the dissolution slurries progress separation of solid and liquid that with the addition of hydramine and/or water-soluble polymer will be supplemented, obtains liquids containing aluminium
Material；
The water-soluble polymer is polyethylene glycol.
2. a kind of coal ash alkali sintered clinker aluminium dissolving-out method, the alkaline sintering clinker is by flyash and at least one alkaline auxiliary
Obtained from solvent is sintered, this method comprises the following steps：
(1) the first aqueous dispersions are being enough from the alkaline sintering clinker to be reacted aluminium under conditions of dissolution, obtained molten
Go out slurries, first aqueous dispersions contain the alkaline sintering clinker, water and optional alkali；
(2) at least one auxiliary agent is added into the dissolution slurries, the auxiliary agent is hydramine and/or water-soluble polymer, hydramine
And/or the addition of water-soluble polymer causes：
When auxiliary agent in the dissolution slurries is hydramine, relative to 100 parts by weight alkaline sintering clinkers, auxiliary agent in the dissolution slurries
Content to be more than 4 parts by weight；Or
When auxiliary agent in the dissolution slurries is water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers, the dissolution slurry
The content of auxiliary agent is more than 4 parts by weight in liquid；Or
It is described relative to 100 parts by weight alkaline sintering clinkers when auxiliary agent in the dissolution slurries is hydramine and water-soluble polymer
The content of auxiliary agent is more than 4.5 parts by weight in dissolution slurries；
(3) the dissolution slurries that with the addition of hydramine and/or water-soluble polymer are subjected to separation of solid and liquid, obtain liquid material containing aluminium；
(4) aluminium is isolated from the liquid material containing aluminium, obtains raffinate, the raffinate is diluted or to described
Supplement addition hydramine and/or water-soluble polymer Posterior circle are used to prepare the first aqueous dispersions in raffinate, are obtained so as to prepare
The first aqueous dispersions contain at least one auxiliary agent, the dilute strength of the raffinate or the hydramine and/or water-soluble poly
The supplement addition of compound causes：
When the auxiliary agent prepared in the first obtained aqueous dispersions is hydramine, relative to 100 parts by weight alkaline sintering clinkers, preparation obtains
The first aqueous dispersions in the content of auxiliary agent be not higher than 3.5 parts by weight；Or
When the auxiliary agent prepared in obtained the first aqueous dispersions is water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers,
The content for preparing auxiliary agent in the first obtained aqueous dispersions is not higher than 3.5 parts by weight；Or
When the auxiliary agent prepared in the first obtained aqueous dispersions is hydramine and water-soluble polymer, burnt relative to 100 parts by weight alkali
Clinker is tied, the total amount of auxiliary agent is not higher than 4 parts by weight in the first aqueous dispersions for preparing to obtain；
The water-soluble polymer is polyethylene glycol.
3. a kind of coal ash alkali sintered clinker aluminium dissolution reaction method, the alkaline sintering clinker is by flyash and at least one alkali
Property cosolvent be sintered obtained from, this method include the first aqueous dispersions are being enough aluminium from the alkaline sintering clinker
Reacted under conditions of dissolution, obtain dissolution slurries, first aqueous dispersions contain the alkaline sintering clinker, water, at least
A kind of auxiliary agent and optional alkali, the auxiliary agent are hydramine and/or water-soluble polymer,
Wherein, the auxiliary agent in first aqueous dispersions is hydramine, relative to 100 parts by weight alkaline sintering clinkers, first water
The content of auxiliary agent is not higher than 3.5 parts by weight in dispersion liquid；Or
Auxiliary agent in first aqueous dispersions is water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers, described first
The content of auxiliary agent is not higher than 3.5 parts by weight in aqueous dispersions；Or
Auxiliary agent in first aqueous dispersions is hydramine and water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers, institute
The total amount for stating auxiliary agent in the first aqueous dispersions is not higher than 4 parts by weight；
The water-soluble polymer is polyethylene glycol.
4. a kind of coal ash alkali sintered clinker aluminium dissolution slurries separation method, the dissolution slurries are by the aluminium in alkaline sintering clinker
Obtained from carrying out dissolution, this method is included in the presence of at least one auxiliary agent, and the dissolution slurries are carried out into separation of solid and liquid, obtained
To liquid material containing aluminium, the auxiliary agent is hydramine；
Wherein, when the auxiliary agent in the dissolution slurries is hydramine, relative to 100 parts by weight alkaline sintering clinkers, the dissolution slurries
The content of middle auxiliary agent is more than 4 parts by weight.
5. separation method according to claim 4, wherein, the dissolution slurries are by alkaline sintering clinker and optional alkali
With water obtained from being enough from the alkaline sintering clinker to be reacted aluminium under conditions of dissolution.
6. the separation method according to claim 4 or 5, wherein, the alkaline sintering clinker is by flyash and at least one
Obtained from alkaline cosolvent is sintered.
7. aluminium dissolving-out method according to claim 1, wherein, the first moisture that the first aqueous dispersions or preparation obtain dissipates
Auxiliary agent in liquid is hydramine, relative to 100 parts by weight alkaline sintering clinkers, the first aqueous dispersions or obtained the first moisture of preparation
The content of auxiliary agent is 0.05-3.5 parts by weight in dispersion liquid；Or
Auxiliary agent in the first aqueous dispersions that first aqueous dispersions or preparation obtain is water-soluble polymer, relative to 100 weights
Part alkaline sintering clinker is measured, the first aqueous dispersions or the content for preparing auxiliary agent in the first obtained aqueous dispersions are 0.05-3.5 weights
Measure part；Or
Auxiliary agent in first aqueous dispersions or obtained the first aqueous dispersions of preparation is hydramine and water-soluble polymer, relative to
The total amount of auxiliary agent is 0.05- in the first aqueous dispersions that 100 parts by weight alkaline sintering clinkers, the first aqueous dispersions or preparation obtain
4 parts by weight.
8. aluminium dissolving-out method according to claim 2, wherein, the first moisture that the first aqueous dispersions or preparation obtain dissipates
Auxiliary agent in liquid is hydramine, relative to 100 parts by weight alkaline sintering clinkers, the first aqueous dispersions or obtained the first moisture of preparation
The content of auxiliary agent is 0.05-3.5 parts by weight in dispersion liquid；Or
Auxiliary agent in the first aqueous dispersions that first aqueous dispersions or preparation obtain is water-soluble polymer, relative to 100 weights
Part alkaline sintering clinker is measured, the first aqueous dispersions or the content for preparing auxiliary agent in the first obtained aqueous dispersions are 0.05-3.5 weights
Measure part；Or
Auxiliary agent in first aqueous dispersions or obtained the first aqueous dispersions of preparation is hydramine and water-soluble polymer, relative to
The total amount of auxiliary agent is 0.05- in the first aqueous dispersions that 100 parts by weight alkaline sintering clinkers, the first aqueous dispersions or preparation obtain
4 parts by weight.
9. dissolution reaction method according to claim 3, wherein, the first moisture that the first aqueous dispersions or preparation obtain
Auxiliary agent in dispersion liquid is hydramine, relative to 100 parts by weight alkaline sintering clinkers, the first aqueous dispersions or obtained the first water of preparation
The content of auxiliary agent is 0.05-3.5 parts by weight in dispersion liquid；Or
Auxiliary agent in the first aqueous dispersions that first aqueous dispersions or preparation obtain is water-soluble polymer, relative to 100 weights
Part alkaline sintering clinker is measured, the first aqueous dispersions or the content for preparing auxiliary agent in the first obtained aqueous dispersions are 0.05-3.5 weights
Measure part；Or
Auxiliary agent in first aqueous dispersions or obtained the first aqueous dispersions of preparation is hydramine and water-soluble polymer, relative to
The total amount of auxiliary agent is 0.05- in the first aqueous dispersions that 100 parts by weight alkaline sintering clinkers, the first aqueous dispersions or preparation obtain
4 parts by weight.
10. according to the method described in any one in claim 7-9, wherein, the first aqueous dispersions or preparation obtain the
Auxiliary agent in one aqueous dispersions is hydramine, and relative to 100 parts by weight alkaline sintering clinkers, the first aqueous dispersions or preparation obtain
The content of auxiliary agent is 0.5-3 parts by weight in first aqueous dispersions；Or
Auxiliary agent in the first aqueous dispersions that first aqueous dispersions or preparation obtain is water-soluble polymer, relative to 100 weights
Part alkaline sintering clinker is measured, the first aqueous dispersions or the content for preparing auxiliary agent in the first obtained aqueous dispersions are 0.5-3.5 weights
Measure part；Or
Auxiliary agent in first aqueous dispersions or obtained the first aqueous dispersions of preparation is hydramine and water-soluble polymer, relative to
The total amount of auxiliary agent is 1-4 weights in the first aqueous dispersions that 100 parts by weight alkaline sintering clinkers, the first aqueous dispersions or preparation obtain
Measure part.
11. according to the method for claim 10, wherein, in the first aqueous dispersions or obtained the first aqueous dispersions of preparation
Auxiliary agent be hydramine, relative to 100 parts by weight alkaline sintering clinkers, the first aqueous dispersions or obtained the first aqueous dispersions of preparation
The content of middle auxiliary agent is 1-2 parts by weight；Or
Auxiliary agent in the first aqueous dispersions that first aqueous dispersions or preparation obtain is water-soluble polymer, relative to 100 weights
Part alkaline sintering clinker is measured, the first aqueous dispersions or the content for preparing auxiliary agent in the first obtained aqueous dispersions are 1-3.5 weight
Part；Or
Auxiliary agent in first aqueous dispersions or obtained the first aqueous dispersions of preparation is hydramine and water-soluble polymer, relative to
The total amount of auxiliary agent is 1-3 weights in the first aqueous dispersions that 100 parts by weight alkaline sintering clinkers, the first aqueous dispersions or preparation obtain
Measure part.
12. according to the method for claim 11, wherein, in the first aqueous dispersions or obtained the first aqueous dispersions of preparation
Auxiliary agent be water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers, the first aqueous dispersions or preparation obtain first
The content of auxiliary agent is 2.5-3.2 parts by weight in aqueous dispersions.
13. dissolving-out method according to claim 1 either dissolving-out method according to claim 2 or according to right
It is required that the dissolution reaction method described in 3, wherein, the first aqueous dispersions or the auxiliary agent prepared in the first obtained aqueous dispersions are
In the first aqueous dispersions that hydramine and water-soluble polymer, the first aqueous dispersions or preparation obtain, hydramine and water-soluble polymeric
The weight ratio of thing is 1：0.1-10.
14. according to the method for claim 13, wherein, the weight ratio of hydramine and water-soluble polymer is 1：0.2-5.
15. according to the method for claim 14, wherein, the weight ratio of hydramine and water-soluble polymer is 1：0.4-2.5.
16. according to the method for claim 14, wherein, the weight ratio of hydramine and water-soluble polymer is 1：0.8-1.2.
17. dissolving-out method according to any one in claim 1 and 7 or according to any one in claim 2 and 8
Described dissolving-out method, wherein, the auxiliary agent in the dissolution slurries is hydramine, described relative to 100 parts by weight alkaline sintering clinkers
The content of auxiliary agent is 4-20 parts by weight in dissolution slurries；Or
Auxiliary agent in the dissolution slurries is water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers, the dissolution slurries
The content of middle auxiliary agent is 4-20 parts by weight；Or
Auxiliary agent in the dissolution slurries is hydramine and water-soluble polymer, described molten relative to 100 parts by weight alkaline sintering clinkers
It is 4.5-20 parts by weight to go out the total amount of hydramine and water-soluble polymer in slurries.
18. according to the method for claim 17, wherein, the auxiliary agent in the dissolution slurries is hydramine, relative to 100 weight
Part alkaline sintering clinker, the content of auxiliary agent is 4-10 parts by weight in the dissolution slurries；Or
Auxiliary agent in the dissolution slurries is water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers, the dissolution slurries
The content of middle auxiliary agent is 4-10 parts by weight；Or
Auxiliary agent in the dissolution slurries is hydramine and water-soluble polymer, described molten relative to 100 parts by weight alkaline sintering clinkers
It is 4.5-10 parts by weight to go out the total amount of hydramine and water-soluble polymer in slurries.
19. according to the method for claim 18, wherein, the auxiliary agent in the dissolution slurries is hydramine, relative to 100 weight
Part alkaline sintering clinker, the content of auxiliary agent is 4-10 parts by weight in the dissolution slurries；Or
Auxiliary agent in the dissolution slurries is water-soluble polymer, relative to 100 parts by weight alkaline sintering clinkers, the dissolution slurries
The content of middle auxiliary agent is 4-6 parts by weight；Or
Auxiliary agent in the dissolution slurries is hydramine and water-soluble polymer, described molten relative to 100 parts by weight alkaline sintering clinkers
It is 5-8 parts by weight to go out the total amount of hydramine and water-soluble polymer in slurries.
20. the separation method according to claim 4 or 5, wherein, the auxiliary agent in the dissolution slurries is hydramine, relative to
100 parts by weight alkaline sintering clinkers, the content of auxiliary agent is 4-20 parts by weight in the dissolution slurries.
21. separation method according to claim 20, wherein, the auxiliary agent in the dissolution slurries is hydramine, relative to 100
Parts by weight alkaline sintering clinker, the content of auxiliary agent is 4-10 parts by weight in the dissolution slurries.
22. separation method according to claim 21, wherein, the auxiliary agent in the dissolution slurries is hydramine, relative to 100
Parts by weight alkaline sintering clinker, the content of auxiliary agent is 4-6 parts by weight in the dissolution slurries.
23. dissolving-out method according to any one in claim 1 and 7 or according to any one in claim 2 and 8
The dissolving-out method, wherein, the auxiliary agent in the dissolution slurries is hydramine and water-soluble polymer, in the dissolution slurries, alcohol
The weight of amine and water-soluble polymer ratio is 1：0.1-10.
24. according to the method for claim 23, wherein, the weight ratio of hydramine and water-soluble polymer is 1：0.2-5.
25. according to the method for claim 24, wherein, the weight ratio of hydramine and water-soluble polymer is 1：1-2.5.
26. dissolving-out method according to any one in claim 1 and 7 or according to any one in claim 2 and 8
Described dissolving-out method either the dissolution reaction method according to any one in claim 3 and 9 or according to right will
The separation method described in 5 is sought, wherein, the weight ratio of the alkaline sintering clinker and alkali is 1：0.1-10.
27. according to the method for claim 26, wherein, the alkali is sodium hydroxide and/or sodium carbonate.
28. dissolving-out method according to any one in claim 1 and 7 or according to any one in claim 2 and 8
Described dissolving-out method either the dissolution reaction method according to any one in claim 3 and 9 or according to right will
The separation method described in 5 is sought, wherein, dissolution reaction is carried out at a temperature of 70-90 DEG C.
29. dissolving-out method according to any one in claim 1 and 7 or according to any one in claim 2 and 8
Described dissolving-out method either the dissolution reaction method according to any one in claim 3 and 9 or according to right will
The separation method described in 6 is sought, wherein, the alkaline cosolvent is selected from sodium carbonate, calcium oxide and can formed under sintering condition
The precursor of calcium oxide.
30. dissolving-out method according to any one in claim 1 and 7 or according to any one in claim 2 and 8
Described dissolving-out method either the dissolution reaction method according to any one in claim 3 and 9 or according to right will
The separation method described in 6 is sought, wherein, the weight ratio of the flyash and the alkaline cosolvent is 1：0.1-10.
31. dissolving-out method according to any one in claim 1 and 7 or according to any one in claim 2 and 8
Described dissolving-out method either the dissolution reaction method according to any one in claim 3 and 9 or according to right will
The separation method described in 6 is sought, wherein, the temperature of the sintering is 950-1250 DEG C.
32. dissolving-out method according to any one in claim 1 and 7 or according to any one in claim 2 and 8
Described dissolving-out method either the dissolution reaction method according to any one in claim 3 and 9 or according to right will
The separation method described in 6 is sought, wherein, the flyash is through pre-desiliconizing.
33. dissolving-out method according to any one in claim 1 and 7 or according to any one in claim 2 and 8
Described dissolving-out method or the separation method according to any one in claim 4-5, wherein, the separation of solid and liquid bag
Include and the dissolution slurries settled and separate supernatant, isolate the liquid phase in remaining slurries, merge the supernatant and
The liquid phase, obtain liquid material containing aluminium.
34. the method according to claim 11, wherein, using the liquid phase filtered to isolate in remaining slurries.
35. according to the dissolving-out method described in any one in claim 1 and 7, wherein, this method also includes containing aluminium liquid from described
Aluminium is isolated in body material, and raffinate is circulated for preparing the first aqueous dispersions.
36. dissolving-out method according to claim 35, wherein, circulated by the raffinate for preparing first water
Before dispersion liquid, this method also includes being diluted the raffinate or the supplement addition auxiliary agent into the raffinate, with
The content of auxiliary agent in the first obtained aqueous dispersions is prepared in adjustment.
37. a kind of aluminum-extracted pulverized fuel ash method, this method includes pre-desilication step, sintering step and dissolution step,
In the pre-desilication step, the second aqueous dispersions are reacted under pre-desiliconizing reaction condition, obtain pre-desiliconizing slurry
Liquid, second aqueous dispersions contain flyash and at least one alkali, and pre-desiliconizing slurries are carried out into separation of solid and liquid, obtain pre-desiliconizing
Flyash and siliceous liquid material；
In the sintering step, the pre-desiliconizing flyash and at least one alkaline cosolvent are sintered, obtain alkali burning
Tie clinker；
In the dissolution step, the second aqueous dispersions containing the alkaline sintering clinker, water and optional alkali are being enough
Aluminium is subjected to dissolution reaction from alkaline sintering clinker under conditions of dissolution, the slurries that dissolution is obtained carry out separation of solid and liquid, obtain
Liquid material containing aluminium and silicon-containing waste residue；
Characterized in that, dissolution reaction side of the dissolution reaction described in using any one in claim 3,9-16,26-32
Method is carried out, or is consolidated in dissolution step using the separation method described in any one in claim 4,20-22 and 26-34
Liquid is separated, or the dissolution step is carried out using the dissolving-out method described in any one in claim 1,7 and 10-36, or
Dissolution step described in person is carried out using the dissolving-out method described in any one in claim 2,8 and 10-32.
38. aluminium method is put forward according to claim 37, wherein, second aqueous dispersions also contain at least one auxiliary agent,
The auxiliary agent is hydramine and/or water-soluble polymer,
It is grey relative to 100 weight parts of fine coal when auxiliary agent in second aqueous dispersions is hydramine, in second aqueous dispersions
The content of auxiliary agent is not higher than 3.5 parts by weight；Or
When auxiliary agent in second aqueous dispersions is water-soluble polymer, relative to 100 weight parts of fine coal ash, second water
The content of auxiliary agent is not higher than 2.5 parts by weight in dispersion liquid；Or
It is described relative to 100 weight parts of fine coal ash when auxiliary agent in second aqueous dispersions is hydramine and water-soluble polymer
The total amount of auxiliary agent is not higher than 3.5 parts by weight in second aqueous dispersions；
The water-soluble polymer is polyethylene glycol.
39. the method according to claim 11, wherein, when the auxiliary agent in second aqueous dispersions is hydramine, relative to
100 weight parts of fine coal are grey, and the content of auxiliary agent is 0.01-3.5 parts by weight in second aqueous dispersions；Or
When auxiliary agent in second aqueous dispersions is water-soluble polymer, relative to 100 weight parts of fine coal ash, second water
The content of auxiliary agent is 0.01-2.5 parts by weight in dispersion liquid；Or
It is described relative to 100 weight parts of fine coal ash when auxiliary agent in second aqueous dispersions is hydramine and water-soluble polymer
The total amount of auxiliary agent is 0.01-3.5 parts by weight in second aqueous dispersions.
40. the method according to claim 11, wherein, when the auxiliary agent in second aqueous dispersions is hydramine, relative to
100 weight parts of fine coal are grey, and the content of auxiliary agent is 0.5-3 parts by weight in second aqueous dispersions；Or
When auxiliary agent in second aqueous dispersions is water-soluble polymer, relative to 100 weight parts of fine coal ash, second water
The content of auxiliary agent is 1-2 parts by weight in dispersion liquid；Or
It is described relative to 100 weight parts of fine coal ash when auxiliary agent in second aqueous dispersions is hydramine and water-soluble polymer
The total amount of auxiliary agent is 0.5-3 parts by weight in second aqueous dispersions.
41. the method according to claim 11, wherein, when the auxiliary agent in second aqueous dispersions is hydramine, relative to
100 weight parts of fine coal are grey, and the content of auxiliary agent is 1-3 parts by weight in second aqueous dispersions；Or
It is described relative to 100 weight parts of fine coal ash when auxiliary agent in second aqueous dispersions is hydramine and water-soluble polymer
The total amount of auxiliary agent is 1-3 parts by weight in second aqueous dispersions.
42. the method according to claim 11, wherein, when the auxiliary agent in second aqueous dispersions is hydramine, relative to
100 weight parts of fine coal are grey, and the content of auxiliary agent is 1-2 parts by weight in second aqueous dispersions.
43. aluminium method is put forward according to any one in claim 37-42, wherein, helping in second aqueous dispersions
Agent is hydramine and water-soluble polymer, and the weight ratio of hydramine and water-soluble polymer is 1：0.1-20.
44. according to claim 43 put forward aluminium method, wherein, auxiliary agent in second aqueous dispersions is hydramine and water-soluble
Property polymer, the weight ratio of hydramine and water-soluble polymer is 1：0.2-5.
45. according to claim 44 put forward aluminium method, wherein, auxiliary agent in second aqueous dispersions is hydramine and water-soluble
The weight ratio of property polymer, hydramine and water-soluble polymer is 0.4-2.5.
46. according to claim 45 put forward aluminium method, wherein, auxiliary agent in second aqueous dispersions is hydramine and water-soluble
Property polymer, the weight ratio of hydramine and water-soluble polymer is 1：0.8-1.2.
47. aluminium method is put forward according to any one in claim 37-42, wherein, pre-desiliconizing slurries are being subjected to solid-liquid
Before separation, this method also includes adding or supplementing into the pre-desiliconizing slurries adding at least one auxiliary agent, the auxiliary agent
For hydramine and/or water-soluble polymer, the addition or supplement addition of the auxiliary agent cause：
It is grey relative to 100 weight parts of fine coal when auxiliary agent in the pre-desiliconizing slurries is hydramine, auxiliary agent in the pre-desiliconizing slurries
Content to be more than 3.6 parts by weight；Or
When auxiliary agent in the pre-desiliconizing slurries is water-soluble polymer, relative to 100 weight parts of fine coal ash, the pre-desiliconizing slurry
The content of auxiliary agent is more than 3 parts by weight in liquid；Or
It is described pre- relative to 100 weight parts of fine coal ash when auxiliary agent in the pre-desiliconizing slurries is hydramine and water-soluble polymer
The content of auxiliary agent is more than 3.6 parts by weight in desiliconization slurries；
The water-soluble polymer is polyethylene glycol.
48. the method according to claim 11, wherein, when the auxiliary agent in the pre-desiliconizing slurries is hydramine, relative to 100
Weight parts of fine coal is grey, and the content of auxiliary agent is 3.6-20 parts by weight in the pre-desiliconizing slurries；Or
When auxiliary agent in the pre-desiliconizing slurries is water-soluble polymer, relative to 100 weight parts of fine coal ash, the pre-desiliconizing slurry
The content of auxiliary agent is 3-20 parts by weight in liquid；Or
It is described pre- relative to 100 weight parts of fine coal ash when auxiliary agent in the pre-desiliconizing slurries is hydramine and water-soluble polymer
The content of auxiliary agent is 3.6-20 parts by weight in desiliconization slurries.
49. the method according to claim 11, wherein, when the auxiliary agent in the pre-desiliconizing slurries is hydramine, relative to 100
Weight parts of fine coal is grey, and the content of auxiliary agent is 3.8-10 parts by weight in the pre-desiliconizing slurries；Or
When auxiliary agent in the pre-desiliconizing slurries is water-soluble polymer, relative to 100 weight parts of fine coal ash, the pre-desiliconizing slurry
The content of auxiliary agent is 3.5-10 parts by weight in liquid；Or
It is described pre- relative to 100 weight parts of fine coal ash when auxiliary agent in the pre-desiliconizing slurries is hydramine and water-soluble polymer
The content of auxiliary agent is 4-15 parts by weight in desiliconization slurries.
50. the method according to claim 11, wherein, when the auxiliary agent in the pre-desiliconizing slurries is hydramine, relative to 100
Weight parts of fine coal is grey, and the content of auxiliary agent is 4-8 parts by weight in the pre-desiliconizing slurries；Or
When auxiliary agent in the pre-desiliconizing slurries is water-soluble polymer, relative to 100 weight parts of fine coal ash, the pre-desiliconizing slurry
The content of auxiliary agent is 4-8 parts by weight in liquid.
51. according to claim 47 put forward aluminium method, wherein, the auxiliary agent in the pre-desiliconizing slurries is hydramine and water solubility
Polymer, in the pre-desiliconizing slurries, the weight ratio of hydramine and water-soluble polymer is 1：0.1-10.
52. according to claim 51 put forward aluminium method, wherein, the weight ratio of hydramine and water-soluble polymer is 1：0.5-2.
53. according to claim 52 put forward aluminium method, wherein, the weight ratio of hydramine and water-soluble polymer is 1：1-2.
54. aluminium method is put forward according to any one in claim 37-42, wherein, in pre-desilication step, the solid-liquid point
From including pre-desiliconizing slurries are settled, supernatant is separated, and isolate the liquid phase in remaining slurries.
55. according to claim 54 put forward aluminium method, wherein, the liquid phase in remaining slurries is isolated by filtration out.
56. aluminium method is put forward according to any one in claim 37-42, wherein, this method is also included from siliceous liquid
Silicon is isolated in material, and obtained raffinate is circulated for preparing the second aqueous dispersions.
57. according to claim 4 put forward aluminium method, wherein, dissipated the raffinate is circulated for preparing the second moisture
Before liquid, this method also includes being diluted the raffinate or supplement addition at least one helps into the raffinate
Agent, the content of auxiliary agent in the second obtained aqueous dispersions is prepared with adjustment.
58. aluminium method is put forward according to any one in claim 37-42, wherein, in pre-desilication step, relative to 100
Weight parts of fine coal ash, the dosage of the alkali is 5-150 parts by weight.
59. according to claim 58 put forward aluminium method, wherein, the alkali is sodium hydroxide.
60. aluminium method is put forward according to any one in claim 37-42, wherein, in pre-desilication step, the reaction exists
Carried out at a temperature of 80-140 DEG C.
61. aluminium method is put forward according to any one in claim 37-42, wherein, this method also includes dealkalize step,
In the dealkalize step, reaction is hydrolyzed in the 3rd aqueous dispersions containing the silicon-containing waste residue, water and optional alkali.
62. according to claim 61 put forward aluminium method, wherein, the hydrolysis is at least one water-soluble polymer
In the presence of carry out.
63. according to claim 62 put forward aluminium method, wherein, relative to 100 parts by weight silicon-containing waste residues, the water-soluble poly
The dosage of compound is 0.5-5 parts by weight.
64. according to claim 63 put forward aluminium method, wherein, relative to 100 parts by weight silicon-containing waste residues, the water-soluble poly
The dosage of compound is 1-4 parts by weight.
65. according to claim 61 put forward aluminium method, wherein, in the dealkalize step, by the silicon-containing waste residue and water
Contacted with alkali, relative to silicon-containing waste residue described in 100 parts by weight, the dosage of the alkali is 10-100 parts by weight.
66. according to claim 65 put forward aluminium method, wherein, the alkali is sodium hydroxide.
67. according to claim 61 put forward aluminium method, wherein, the hydrolysis is carried out at a temperature of 100-180 DEG C.
68. aluminium method is put forward according to any one in claim 32-36, wherein, the mixture that hydrolysis is obtained is carried out
Separation of solid and liquid, dealkalize silicon-containing waste residue is obtained, and the liquid phase circulation isolated is used for the 3rd aqueous dispersions of preparation.
69. according to the method described in any one in claim 1-5 and 7-9, wherein, the hydramine is monoethanolamine.
70. according to the method described in any one in claim 38-42, wherein, the hydramine is monoethanolamine.
71. according to the method for claim 47, wherein, the hydramine is monoethanolamine.
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