CN108658110A - A kind of technique of integrated treatment red mud, flyash and low-grade bauxite - Google Patents
A kind of technique of integrated treatment red mud, flyash and low-grade bauxite Download PDFInfo
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- CN108658110A CN108658110A CN201810711352.6A CN201810711352A CN108658110A CN 108658110 A CN108658110 A CN 108658110A CN 201810711352 A CN201810711352 A CN 201810711352A CN 108658110 A CN108658110 A CN 108658110A
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- low
- flyash
- red mud
- grade bauxite
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- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 73
- 239000010881 fly ash Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000002994 raw material Substances 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 15
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive Effects 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 238000007792 addition Methods 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N al2o3 Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 40
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 19
- GNVXPFBEZCSHQZ-UHFFFAOYSA-N iron(2+);sulfide Chemical compound [S-2].[Fe+2] GNVXPFBEZCSHQZ-UHFFFAOYSA-N 0.000 claims description 13
- 238000004090 dissolution Methods 0.000 claims description 12
- 229910001884 aluminium oxide Inorganic materials 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000002244 precipitate Substances 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 238000005188 flotation Methods 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- WNROFYMDJYEPJX-UHFFFAOYSA-K Aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 7
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L na2so4 Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- GNTDGMZSJNCJKK-UHFFFAOYSA-N Vanadium(V) oxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 238000006555 catalytic reaction Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 229910000460 iron oxide Inorganic materials 0.000 claims description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Chemical group [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical group C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 3
- 239000003830 anthracite Substances 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000001187 sodium carbonate Substances 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 238000004131 Bayer process Methods 0.000 claims description 2
- 235000017550 sodium carbonate Nutrition 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 1
- 239000004411 aluminium Substances 0.000 abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 13
- 238000011084 recovery Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 14
- 239000000203 mixture Substances 0.000 description 11
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 10
- 239000000377 silicon dioxide Substances 0.000 description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 10
- 238000004458 analytical method Methods 0.000 description 9
- 229910052681 coesite Inorganic materials 0.000 description 9
- 229910052906 cristobalite Inorganic materials 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 9
- 229910052904 quartz Inorganic materials 0.000 description 9
- 229910052682 stishovite Inorganic materials 0.000 description 9
- 229910052905 tridymite Inorganic materials 0.000 description 9
- 229910052593 corundum Inorganic materials 0.000 description 8
- 229910001388 sodium aluminate Inorganic materials 0.000 description 8
- 229910001845 yogo sapphire Inorganic materials 0.000 description 8
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 6
- IYJYQHRNMMNLRH-UHFFFAOYSA-N Sodium aluminate Chemical compound [Na+].O=[Al-]=O IYJYQHRNMMNLRH-UHFFFAOYSA-N 0.000 description 6
- NTGONJLAOZZDJO-UHFFFAOYSA-M disodium;hydroxide Chemical compound [OH-].[Na+].[Na+] NTGONJLAOZZDJO-UHFFFAOYSA-M 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 5
- 239000005864 Sulphur Substances 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L Calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 229910052925 anhydrite Inorganic materials 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- MBMLMWLHJBBADN-UHFFFAOYSA-N iron-sulfur Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 2
- 229910052976 metal sulfide Inorganic materials 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- JHLNERQLKQQLRZ-UHFFFAOYSA-N Calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N Phosphite Chemical compound [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
- 229940047431 Recombinate Drugs 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001399 aluminium compounds Chemical class 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- -1 calcirm-fluoride Chemical compound 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- GJYLKIZKRHDRER-UHFFFAOYSA-N calcium;sulfuric acid Chemical group [Ca].OS(O)(=O)=O GJYLKIZKRHDRER-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001376 precipitating Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/0693—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process from waste-like raw materials, e.g. fly ash or Bayer calcination dust
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
- C01F7/141—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by neutralisation with an acidic agent
- C01F7/142—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by neutralisation with an acidic agent with carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/06—Ferric oxide (Fe2O3)
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/12—Sulfides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
The invention discloses the techniques of a kind of integrated treatment red mud, flyash and low-grade bauxite, include the following steps：1）Ardealite, red mud, flyash, low-grade bauxite, additive and modifying agent are mixed and ground, raw material are made, the weight ratio for controlling ardealite in raw material, red mud, flyash and low-grade bauxite is 1:0.3‑0.7:0.2‑0.4：0.1 0.4, additive adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixed proportion of modifying agent are the 10 20% of raw material total weight；Raw material are sent into kiln and are roasted, clinker is made；2）By step 1）It dissolves out, and is separated by solid-liquid separation after clinker grinding obtained.The present invention has opened up the new opplication of ardealite, red mud, flyash and low-grade bauxite, has treatment process simple, at low cost, and added value is high, and the valuable material rate of recovery is high, the high feature of the aluminium component purity of recycling.
Description
Technical field
The present invention relates to the techniques of a kind of integrated treatment red mud, flyash and low-grade bauxite, belong to chemical metallurgy neck
Domain.
Background technology
Ardealite refer in phosphoric acid production with sulfuric acid treating phosphorite when the solid slag that generates, main component is sulfuric acid
Calcium (CaSO4), content generally can reach 70~90% or so.In addition, ardealite also contains plurality of impurities：Undecomposed phosphorus
Mine, phosphoric acid, calcirm-fluoride, iron, aluminium compound, acid non-soluble substance, organic matter of non-washes clean etc..
Red mud is the waste residue of generation during bauxite aluminium, and the red mud generated during Bayer process production aluminium is called Bayer
Red mud.Although the iron content in common red mud is less, usually less than 7% or so, wherein containing a large amount of sial element.
Flyash is to capture the solids to get off in the flue gas after coal combustion, is concentrated mainly on the area of coal fired power generation,
In contain the valuable constituents such as a large amount of aluminium, iron, silicon.The flyash that China generates every year is about more than 100,000,000 tons, and the overwhelming majority passes through
Stockpiling mode is handled, and seriously polluted local environment.And for the processing of flyash, it is now concentrated mainly at present for cement etc.
The raw material of building materials.
Low-grade bauxite refers to remaining tailing after ore concentration of bauxite, and wherein aluminium silicone content ratio is very low, generally reach 4 with
Under can be referred to as low-grade bauxite.Since its silicone content is excessively high, seldom it is used as alumina producing.But with
The content for high-grade bauxite is fewer and fewer, and low-grade bauxite is more and more, how to carry out low-grade bauxite effective
Using being a now current big project.Due to its alumina silica ratio is very low, now be presently mainly as building wall brick or
Person non-burning brick raw material uses, although being applied, added value is very low.
Although containing a large amount of valuable material, such as sulphur, iron, aluminium, silicon in ardealite, red mud and flyash；But China
Annual about 20,000,000 tons of ardealite of discharge, adds up nearly hundred million tons of discharge capacity.And 1 ton of aluminium oxide is often produced, about generate red mud 0.8-1.5
Ton.The year yield of China's red mud is tens million of tons, and accumulative volume of cargo in storage is up to several hundred million tons.And the flyash generated every year is about one
More than hundred million tons, the low-grade bauxite accumulated because difficult is also flood tide.
Since the amount of ardealite, red mud, flyash and low-grade bauxite is huge, meanwhile, now at present for ardealite, red
The application of mud, flyash and low-grade bauxite is less, paves the way mainly for the production of building building cement and directly, and passes through phosphorus stone
The complex process of cream, red mud, flyash and low-grade bauxite extraction recycling valuable material, it is of high cost.Result in now current phosphorus
Gypsum, red mud, the consumption of flyash and low-grade bauxite are few, and ardealite, red mud, flyash and low-grade bauxite are answered
With the low defect of added value.And comprehensively utilize ardealite, red mud, flyash and low-grade bauxite, extraction recycling has
Valence object Quality Research has not been reported.
Goal of the invention
The object of the present invention is to provide the techniques of a kind of integrated treatment red mud, flyash and low-grade bauxite.This hair
The bright new opplication for having opened up ardealite, red mud, flyash and low-grade bauxite has treatment process simple, at low cost, adds
Value is high, and the valuable material rate of recovery is high, the high feature of the aluminium component purity of recycling.
Technical scheme of the present invention
The technique of a kind of integrated treatment red mud, flyash and low-grade bauxite, includes the following steps：
1) ardealite, red mud, flyash, low-grade bauxite, additive and modifying agent are mixed and are ground and raw material are made,
The weight ratio for controlling ardealite in raw material, red mud, flyash and low-grade bauxite is 1:0.3-0.7:0.2-0.4：0.1-
0.4, additive adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, modifying agent mix
Composition and division in a proportion example is the 10-20% of raw material total weight；Raw material are sent into kiln and are roasted, clinker is made；
2) it will dissolve out, and be separated by solid-liquid separation after clinker grinding made from step 1).
The technique of integrated treatment red mud above-mentioned, flyash and low-grade bauxite, in step 1), the red mud is to visit
Ear method red mud, wherein Fe2O3Content be less than 7%；Al/Si ＜ 4 in the low-grade bauxite；The additive be sodium carbonate,
Sodium sulphate or caustic soda；The modifying agent is anthracite, carbon or gangue.
The technique of integrated treatment red mud above-mentioned, flyash and low-grade bauxite, in step 1), the kiln is that industry is returned
Rotary kiln, Industry Tunnel Kiln or industrial shaft kiln.
The technique of integrated treatment red mud above-mentioned, flyash and low-grade bauxite, in step 1), the raw material are in temperature
Roasting time 2-4 hours at 1050-1150 DEG C of degree.
The technique of integrated treatment red mud above-mentioned, flyash and low-grade bauxite, it is described to be ground to water in step 2)
Mill, when dissolution with it is water-soluble go out.
The technique of integrated treatment red mud above-mentioned, flyash and low-grade bauxite, in step 2), the liquid when dissolution
Gu volume ratio is 4-6:1.
The technique of integrated treatment red mud above-mentioned, flyash and low-grade bauxite is separated by solid-liquid separation in step 2) and to obtain
Precipitation carries out flotation, isolates iron sulfide, and the flue gas after iron sulfide is roasted is used for relieving haperacidity, and residue is iron oxide.
The technique of integrated treatment red mud above-mentioned, flyash and low-grade bauxite, the iron sulfide are placed in 20-30%
Oxygen-enriched environment under, roasted 1-3 hours at 800-900 DEG C, roast the flue gas of generation and used after vanadic anhydride catalysis reaction
The concentrated sulfuric acid, which absorbs, is made sulfuric acid.
The technique of integrated treatment red mud above-mentioned, flyash and low-grade bauxite, to liquid isolated in step 2)
CO is added in body2It is no longer generated to white precipitate, white precipitate is then filtered out into rear cleaning, drying, obtains aluminium hydroxide, by gained
Aluminium hydroxide roasting, obtain aluminium oxide.
The technique of integrated treatment red mud above-mentioned, flyash and low-grade bauxite, the roasting is in temperature 800-900
Roasting time 1-3 hours at DEG C.
The present invention is by by ardealite and red mud reaction, recombination, making utility.The net reaction of principle is：
CaSO4(ardealite)+Na2O·SiO2·Al2O3(red mud, flyash, low-grade bauxite) → Na2O·Al2O3+
CaO·SiO2↓+[sulphur]
From the reaction equation it is found that with the CaO and SiO in red mud, flyash and low-grade bauxite in ardealite2It generates
Calcium orthosilicate (2CaOSiO2↓) after, obtain soluble fabulous sodium aluminate (Na2O·Al2O3).[sulphur] in reaction equation is
Refer to and adds modifying agent technique, the metal sulfide of generation, main component FeS by raw material；After leaching the sodium aluminate in clinker,
Obtained sediment flotation be can be obtained into FeS.
Advantageous effect
1, the present invention is by using ardealite, red mud, flyash and low-grade bauxite as primary raw material, by being added
Dissolution is ground after adding agent and modifying agent to roast, you can obtains the mainly solution containing sodium aluminate, for recycling aluminium, and precipitating residue passes through
It can be used to production sulfuric acid after flotation and recycle iron, carried to which main valuable material sulphur, silicon and aluminium have been carried out effective recycling
It takes, opens the new direction of ardealite, red mud, flyash and low-grade bauxite comprehensive utilization.
2, the present invention only needs that modifying agent is added after mixing ardealite, red mud, flyash and low-grade bauxite and adds
Agent is added to roast, then dissolution is separated by solid-liquid separation, and solid portion and liquid portion can be incited somebody to action by conventional extraction process
Valuable material ingredient carries out separation and Extraction, simple for process, and key reaction material is all waste residue, greatly reduces integrated application
Cost, and improve the added value of ardealite, red mud, flyash and low-grade bauxite.
3, the present invention makes substance recombinate by roasting, forms main silicate, metal sulfide and sodium aluminate ingredient, and
Sodium aluminate can be directly dissolved in water, and other compositions can detach main iron sulfide after flotation in solid residue,
Relieving haperacidity carries iron after roasting, easily separated because ingredient is clearly demarcated, substantially increases the rate of recovery of each ingredient, simultaneously as readily soluble
It is mainly sodium aluminate in the ingredient of water, other compositions are seldom, almost without the purity of the aluminium of recycling is substantially increased.
Tests prove that after present invention process processing, the purity of the aluminium oxide recycled can reach 99% or more.
Specific implementation mode
With reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
The embodiment of the present invention
Embodiment 1：
The Principle components analysis table of the present embodiment red mud
| Composition | Al2O3 | Fe2O3 | CaO | SiO2 | TiO2 | Na2O | MgO | Igloss |
| Content | 26.2% | 6.5% | 18.2% | 21.1% | 5.1% | 6.2% | 0.6% | 11.2% |
The Principle components analysis table of the present embodiment flyash
| Composition | Al2O3 | Fe2O3 | CaO | SiO2 | TiO2 | Na2O | MgO | C | P | S |
| Content | 22.6% | 16.8% | 15.6% | 22.1% | 1.9% | 0.8% | 0.7% | 0.1% | 0.4% | 3.1% |
The Principle components analysis table of the present embodiment low-grade bauxite
The technique of a kind of integrated treatment red mud, flyash and low-grade bauxite, steps are as follows：
1) ardealite, red mud, flyash, low-grade bauxite, sodium carbonate and anthracite are mixed and are ground and raw material are made,
The weight ratio for controlling ardealite in raw material, red mud, flyash and low-grade bauxite is 1:0.3:0.2：0.1, additive addition
Ratio presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:The mixed proportion of 1 addition, modifying agent is that raw material are total
The 10% of weight；Raw material are sent into industrial rotary kiln roasting time 4 hours at 1050 DEG C of temperature, clinker is made；
2) by clinker water mill made from step 1), when dissolution with it is water-soluble go out, it is 4 that liquid when dissolution, which consolidates volume ratio,:1, it goes forward side by side
Row is separated by solid-liquid separation.
Embodiment 2：
The Principle components analysis table of the present embodiment red mud
| Composition | Al2O3 | Fe2O3 | CaO | SiO2 | TiO2 | Na2O | MgO | Igloss |
| Content | 22.7% | 6.9% | 14.8% | 19.1% | 6.1% | 5.2% | 0.6% | 10.1% |
The Principle components analysis table of the present embodiment flyash
| Composition | Al2O3 | Fe2O3 | CaO | SiO2 | TiO2 | Na2O | MgO | C | P | S |
| Content | 20.1% | 17.7% | 12.7% | 25.5% | 1.5% | 0.5% | 0.7% | 0.1% | 0.3% | 3.1% |
The Principle components analysis table of the present embodiment low-grade bauxite
| Composition | Al2O3 | SiO2 | Fe2O3 | Other |
| Content | 57.2% | 15.7% | 8.9% | 18.2% |
The technique of a kind of integrated treatment red mud, flyash and low-grade bauxite, steps are as follows：
1) ardealite, red mud, flyash, low-grade bauxite, sodium sulphate and carbon are mixed and is ground and raw material are made, controlled
Ardealite in raw material, red mud, flyash and low-grade bauxite weight ratio be 1:0.5:0.3：0.3, additive adding proportion
By contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:The mixed proportion of 1 addition, modifying agent is raw material total weight
15%；Raw material are sent into Industry Tunnel Kiln roasting time 3 hours at 1000 DEG C of temperature, clinker is made；
2) by clinker water mill made from step 1), when dissolution with it is water-soluble go out, it is 5 that liquid when dissolution, which consolidates volume ratio,:1, it goes forward side by side
Row is separated by solid-liquid separation.
Embodiment 3：
The Principle components analysis table of the present embodiment red mud
| Composition | Al2O3 | Fe2O3 | CaO | SiO2 | TiO2 | Na2O | MgO | Igloss |
| Content | 26.3% | 6.2% | 19.6% | 22.5% | 5.6% | 6.0% | 0.6% | 10.3% |
The Principle components analysis table of the present embodiment flyash
The Principle components analysis table of the present embodiment low-grade bauxite
| Composition | Al2O3 | SiO2 | Fe2O3 | Other |
| Content | 52.1% | 28.7% | 6.4% | 12.8% |
The technique of a kind of integrated treatment red mud, flyash and low-grade bauxite, steps are as follows：
1) ardealite, red mud, flyash, low-grade bauxite, caustic soda and gangue are mixed and is ground and raw material are made, controlled
Ardealite in raw material processed, red mud, flyash and low-grade bauxite weight ratio be 1:0.7:0.4：0.4, additive adds ratio
Example is by contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:The mixed proportion of 1 addition, modifying agent is raw material gross weight
The 20% of amount；Raw material are sent into industrial shaft kiln roasting time 2 hours at 1150 DEG C of temperature, clinker is made；
2) by clinker water mill made from step 1), when dissolution with it is water-soluble go out, it is 6 that liquid when dissolution, which consolidates volume ratio,:1, it goes forward side by side
Row is separated by solid-liquid separation.
Embodiment 4：The technique of a kind of integrated treatment red mud, flyash and low-grade bauxite, by 1/2/3 solid-liquid of embodiment
Isolated precipitation carries out flotation, isolates iron sulfide, iron sulfide is placed under 20% oxygen-enriched environment, roasted at 800 DEG C
It burns 3 hours, the flue gas for roasting generation absorbs obtained sulfuric acid after vanadic anhydride catalysis reaction with the concentrated sulfuric acid, and residue is oxidation
Iron.
In the present embodiment, the rate of recovery of iron oxide is 97.6%.
Embodiment 5：The technique of a kind of integrated treatment red mud, flyash and low-grade bauxite, by 1/2/3 solid-liquid of embodiment
Isolated precipitation carries out flotation, isolates iron sulfide, iron sulfide is placed under 25% oxygen-enriched environment, roasted at 850 DEG C
It burns 2 hours, the flue gas for roasting generation absorbs obtained sulfuric acid after vanadic anhydride catalysis reaction with the concentrated sulfuric acid, and residue is oxidation
Iron.
In the present embodiment, the rate of recovery of iron oxide is 97.2%.
Embodiment 6：The technique of a kind of integrated treatment red mud, flyash and low-grade bauxite, by 1/2/3 solid-liquid of embodiment
Isolated precipitation carries out flotation, isolates iron sulfide, iron sulfide is placed under 30% oxygen-enriched environment, roasted at 900 DEG C
It burns 1 hour, the flue gas for roasting generation absorbs obtained sulfuric acid after vanadic anhydride catalysis reaction with the concentrated sulfuric acid, and residue is oxidation
Iron.
In the present embodiment, the rate of recovery of iron oxide is 97.9%.
Embodiment 7：The technique of a kind of integrated treatment red mud, flyash and low-grade bauxite, to 1/2/3 solid-liquid of embodiment
CO is added in isolated liquid2It is no longer generated to white precipitate, white precipitate is then filtered out into rear cleaning, drying, obtains hydrogen-oxygen
Change aluminium, by the aluminium hydroxide of gained at 800 DEG C of temperature roasting time 3 hours, obtain aluminium oxide.
The rate of recovery of aluminium oxide is 94.2% in the present embodiment, purity 99.7%.
Embodiment 8：The technique of a kind of integrated treatment red mud, flyash and low-grade bauxite, to 1/2/3 solid-liquid of embodiment
CO is added in isolated liquid2It is no longer generated to white precipitate, white precipitate is then filtered out into rear cleaning, drying, obtains hydrogen-oxygen
Change aluminium, by the aluminium hydroxide of gained at 850 DEG C of temperature roasting time 2 hours, obtain aluminium oxide.
The rate of recovery of aluminium oxide is 94.2% in the present embodiment, purity 99.4%.
Embodiment 9：The technique of a kind of integrated treatment red mud, flyash and low-grade bauxite, to 1/2/3 solid-liquid of embodiment
CO is added in isolated liquid2It is no longer generated to white precipitate, white precipitate is then filtered out into rear cleaning, drying, obtains hydrogen-oxygen
Change aluminium, by the aluminium hydroxide of gained at 900 DEG C of temperature roasting time 1 hour, obtain aluminium oxide.
The rate of recovery of aluminium oxide is 95.4% in the present embodiment, purity 99.8%.
Claims (10)
1. the technique of a kind of integrated treatment red mud, flyash and low-grade bauxite, which is characterized in that include the following steps：
1）Ardealite, red mud, flyash, low-grade bauxite, additive and modifying agent are mixed and ground, raw material are made, controlled
Ardealite in raw material, red mud, flyash and low-grade bauxite weight ratio be 1:0.3-0.7:0.2-0.4：0.1-0.4 adds
Add agent adding proportion by contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixed proportion of modifying agent
For the 10-20% of raw material total weight；Raw material are sent into kiln and are roasted, clinker is made；
2）By step 1）It dissolves out, and is separated by solid-liquid separation after clinker grinding obtained.
2. the technique of integrated treatment red mud according to claim 1, flyash and low-grade bauxite, it is characterised in that：
Step 1）In, the red mud is Bayer process red mud, wherein Fe2O3Content be less than 7%；Al/Si in the low-grade bauxite
＜ 4；The additive is sodium carbonate, sodium sulphate or caustic soda；The modifying agent is anthracite, carbon or gangue.
3. the technique of integrated treatment red mud according to claim 1, flyash and low-grade bauxite, it is characterised in that：
Step 1）In, the kiln is industrial rotary kiln, Industry Tunnel Kiln or industrial shaft kiln.
4. the technique of integrated treatment red mud according to claim 1, flyash and low-grade bauxite, it is characterised in that：
Step 1）In, the raw material are roasting time 2-4 hours at 1050-1150 DEG C of temperature.
5. the technique of integrated treatment red mud according to claim 1, flyash and low-grade bauxite, it is characterised in that：
Step 2）In, it is described to be ground to water mill, when dissolution with it is water-soluble go out.
6. the technique of integrated treatment red mud according to claim 1, flyash and low-grade bauxite, it is characterised in that：
Step 2）In, it is 4-6 that the liquid when dissolution, which consolidates volume ratio,:1.
7. the technique of integrated treatment red mud according to claim 1, flyash and low-grade bauxite, it is characterised in that：
Step 2）The middle obtained precipitation that is separated by solid-liquid separation carries out flotation, isolates iron sulfide, and the flue gas after iron sulfide is roasted is used for relieving haperacidity,
Residue is iron oxide.
8. the technique of integrated treatment red mud according to claim 7, flyash and low-grade bauxite, it is characterised in that：
The iron sulfide is placed under the oxygen-enriched environment of 20-30%, is roasted 1-3 hours at 800-900 DEG C, and the flue gas warp of generation is roasted
It is absorbed with the concentrated sulfuric acid after vanadic anhydride catalysis reaction and sulfuric acid is made.
9. the technique of integrated treatment red mud according to claim 1, flyash and low-grade bauxite, it is characterised in that：
To step 2）In CO is added in isolated liquid2It no longer generates to white precipitate, is cleaned after then filtering out white precipitate
Drying, obtains aluminium hydroxide, by the Aluminium hydroxide roasting of gained, obtains aluminium oxide.
10. the technique of integrated treatment red mud according to claim 9, flyash and low-grade bauxite, it is characterised in that：
The roasting is roasting time 1-3 hours at 800-900 DEG C of temperature.
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| CN108483408A (en) * | 2018-07-03 | 2018-09-04 | 贵州大学 | A kind of comprehensive utilization process of ardealite, red mud and low-grade bauxite |
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