CN102689908B - Method for improving acidolysis and filtration of boron-riched paigeite slag and improving quality of boric acid product - Google Patents
Method for improving acidolysis and filtration of boron-riched paigeite slag and improving quality of boric acid product Download PDFInfo
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- CN102689908B CN102689908B CN201110067238.2A CN201110067238A CN102689908B CN 102689908 B CN102689908 B CN 102689908B CN 201110067238 A CN201110067238 A CN 201110067238A CN 102689908 B CN102689908 B CN 102689908B
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- boron
- acidolysis
- boric acid
- rich slag
- slag
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- 239000002893 slag Substances 0.000 title claims abstract description 61
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000004327 boric acid Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001914 filtration Methods 0.000 title abstract description 24
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 66
- 229910052796 boron Inorganic materials 0.000 claims abstract description 66
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 18
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 11
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 8
- 239000004571 lime Substances 0.000 claims abstract description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 8
- 159000000007 calcium salts Chemical class 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 239000012752 auxiliary agent Substances 0.000 claims description 14
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 13
- 239000000292 calcium oxide Substances 0.000 claims description 8
- 235000012255 calcium oxide Nutrition 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
- 239000000920 calcium hydroxide Substances 0.000 claims description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 6
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 6
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 9
- 239000000654 additive Substances 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 4
- 238000003889 chemical engineering Methods 0.000 abstract description 2
- 229940028001 boric acid antiseptic and disinfectant Drugs 0.000 abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 235000010338 boric acid Nutrition 0.000 description 21
- 229960002645 boric acid Drugs 0.000 description 21
- 239000000047 product Substances 0.000 description 17
- 238000002386 leaching Methods 0.000 description 9
- 239000012065 filter cake Substances 0.000 description 6
- 239000011575 calcium Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 238000005903 acid hydrolysis reaction Methods 0.000 description 4
- 229910001678 gehlenite Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 235000010755 mineral Nutrition 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 238000010792 warming Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 235000011132 calcium sulphate Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052839 forsterite Inorganic materials 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 229910021538 borax Inorganic materials 0.000 description 2
- QYHKLBKLFBZGAI-UHFFFAOYSA-N boron magnesium Chemical compound [B].[Mg] QYHKLBKLFBZGAI-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004328 sodium tetraborate Substances 0.000 description 2
- 235000010339 sodium tetraborate Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- QHFQAJHNDKBRBO-UHFFFAOYSA-L calcium chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Ca+2] QHFQAJHNDKBRBO-UHFFFAOYSA-L 0.000 description 1
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical class [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Silicon Compounds (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a method for improving acidolysis and filtration of boron-riched paigeite slag and improving quality of boric acid products, and pertains to the field of chemical engineering. By adding filtration aids and desiliconization aids into an acidolysis slurry of the boron-riched slag, the filtration velocity of the acidolysis slurry of the boron-riched slag is increased, loss of active components in the acidolysis solution is reduced, and silica sol in the acidolysis solution is removed so as to improve the quality of the boric acid products. The method takes lime and other calcium salts, etc. as mixed additives, the additives reacts with excess sulfuric acid in the acidolysis slurry of the boron-riched slag to produce calcium sulfate crystals, the filtration velocity of the acidolysis slurry can be increased, at the same time the calcium-contained additives can also reacts with the silica sol in the acidolysis solution to reduce silicon content in the acidolysis solution, so that the quality of the boric acid products is improved. After the acidolysis slurry of the boron-riched slag is subjected to the above-mentioned processes, the filtration velocity of the acidolysis slurry can reach 1.5-3.0M<3>/m<2>.h, and SiO2 content in the boric acid products is less than 0.05 wt%. The method has advantages of low processing cost, high boron yield, good boric acid product quality, and the like.
Description
Technical field
The present invention relates to a kind of method that boric acid quality product was filtered and improved in the boron-rich slag acidolysis of paigeite of improving, the mixture etc. of Wingdale, lime or slaked lime and calcium salt of take improves the filtration procedure of boron-rich slag acid hydrolysis solution as additive, reduce silicone content in acid hydrolysis solution simultaneously, improve the quality of product boric acid, belong to chemical engineering subject field.
Background technology
The boron resource of China mainly exists with the form of boron magnesium ore deposit and paigeite, and rich ore is few, lean ore many (Li Jie etc., mineral products comprehensive utilization, 2009 (1): 3-7).Along with to the continually developing of higher-grade boron resource, abundant ore source constantly reduces, and therefore fully utilizes low-grade boron ore resource and is of great practical significance.Boron-rich slag is the low-grade paigeite by product that melt selective reduction obtains after by boron, iron separation in electric furnace or blast furnace, and this technique makes boron in slag, obtain enrichment (an aobvious boron etc., iron and steel, 30 (12), 1995), B
2o
3grade content can reach 12～20%, met or exceeded the standard in one-level boron magnesium ore deposit (12%), the raw material with its alternative szaibelyite as borax processed and boric acid.Although the grade of boron has improved in boron-rich slag, but because having major part, the boron oxide in boron-rich slag in the cool down after pyrotic smelting becomes vitreous state, make boron-rich slag reactive behavior lower than 50%, be difficult to adopt carbon alkaline process processing borax (Lang Jianfeng etc. processed, inorganic chemicals industry, (4), 1994).The main thing of boron-rich slag is suanite (2MgOB mutually
2o
3) and forsterite (2MgOSiO
2) and a small amount of gehlenite (Ca
2al
2siO
7) (Liu Sulan etc., chemical mine technology, 1997 (05): 38-40).Because the leaching of sulfuric acid is very capable, not only perfect crystal easily leaches, and a small amount of crystallite also has part to separate out, high (the Liu Sulan etc. of acidolysis rate, Northeastern University's journal, 1996 (04)), so utilize the technique of the boron-rich slag preparing boracic acid of sulfuric acid solution to there is very large industrial application value.
Although acid system decomposes the boron-rich slag preparing boric acid of paigeite, have larger industrial application value, some problems that exist in boron-rich slag acidolysis process have restricted the application of this technique in actual production.In boron-rich slag except boron mineral suanite (2MgOB
2o
3) outside, also have other siliceous mineral forsterites (2MgOSiO
2) and gehlenite (Ca
2al
2siO
7).During boron-rich slag acidolysis, these silicate mineralss also participate in reaction and generate corresponding calcium magnesium salts and silicic acid sol.The generation of these by products not only affects the filtration of boron-rich slag acidolysis slip, causes that acidolysis slag moisture content is high, the boron rate of recovery is low, and silicic acid sol also produces and has a strong impact on boric acid quality product.For many years, due to the essence of above-mentioned technological difficulties is lacked to careful research, problem is outstanding always, has directly restricted the application aborning of this technique.
Summary of the invention
In order to solve the problem existing in above-mentioned boron-rich slag acidolysis preparing boric acid technological process, the invention provides a kind of method that boric acid quality product was filtered and improved in the boron-rich slag acidolysis of paigeite of improving, the method is simple to operate, cost is lower, be easy to industrializing implementation.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of improve that the boron-rich slag acidolysis of paigeite is filtered and the method that improves boric acid quality product is that with sulfuric acid, to decompose granularity be 60-350 order, containing B
2o
3the boron-rich slag that weight percentage is 10～20%, MgO weight percentage is 30～55%, CaO weight percentage is 2～15%, at normal pressure and room temperature～110 ℃, employing weight is that lime and the calcium salt admixture of boron-rich slag gross weight 1%～25% is interpolation auxiliary agent, make to add the sulfuric acid reaction in auxiliary agent and boron-rich slag acidolysis slip, generate the CaSO that a kind of length-to-diameter ratio is larger
42H
2o rhabdolith; Add auxiliary agent simultaneously and also react with the silicic acid sol in boron-rich slag acidolysis slip, generate a kind of insoluble Calucium Silicate powder.
Described boron-rich slag is the separated boron-rich slag obtaining of paigeite blast furnace, or the separated boron-rich slag obtaining of paigeite electric furnace.
In described interpolation auxiliary agent, lime is unslaked lime, slaked lime, limestone dust or their mixture, and described calcium salt is calcium sulfate, nitrocalcite, calcium chloride or their mixture.
Calcic of the present invention adds auxiliary agent and can after boron-rich slag acidolysis reaction mid-term, last stage reaction or acidolysis reaction finish, add, and acidolysis slip can adopt plate-and-frame filter press or other solid-liquid separating equipment to carry out separation.Add the reaction times of auxiliary agent and slip etc. at 5-30 minute, digestion time 2-60 minute.
Principle of the present invention is: in boron-rich slag, main thing is suanite (2MgOB mutually
2o
3) and forsterite (2MgOSiO
2) and a small amount of gehlenite (Ca
2al
2siO
7).When adopting sulfuric acid Decomposition of Boron-rich Slag preparing boric acid, there is reaction as follows:
2MgO·B
2O
3+2H
2SO
4+H
2O＝2H
3BO
3+2MgSO
4
2MgO·SiO
2+2H
2SO
4＝2MgSO
4+H
2SiO
3+H
2O
Ca
2Al
2SiO
7+5H
2SO
4＝2CaSO
4+Al
2(SO
4)
3+H
2SiO
3+4H
2O
When above-mentioned reaction is carried out, in acidolysis feed liquid, there are boric acid, magnesium sulfate, Tai-Ace S 150 and silicic acid sol, in acidolysis slag, be mainly calcium sulfate and unreacted forsterite and gehlenite.
The filtration of boron-rich slag acidolysis slip is cake filtration, considers that filter operation gained filter cake is incompressible, the filtering rate equation after simplification:
In formula, V-liquid volume, m
3; A-filtration area, m
2; T-filtration time, s;
Δ P-filtered driving force, Pa; The dry filter cake quality that m-unit's filtration area is held back, kgm
-2;
μ-filtrate viscosity, PaS; R
m-filter(ing)medium resistance, m
-1;
α
m-filter cake average quality resistivity, mkg
-1;
And α
mrelational expression as follows:
ε-filter cake porosity; d
s-particle median size
The factor that can change obviously, only has μ and α
mif can manage to reduce liquid phase viscosity μ and filter cake resistivity α
m, will make filtration resistance decline, improve intensity filter.Filtered while hot can reduce filtrate viscosity, mu, improves intensity filter.Known from formula (2), particle median size d
slarger, porosity ε is also larger, α
mless, filtering rate is larger.When adding calcic to add auxiliary agent agent, there is reaction as follows:
CaO+H
2SO
4+H
2O＝CaSO
4·2H
2O
2CaO+H
2SiO
3＝Ca
2SiO
4+H
2O
Take suitable means and processing method to control CaSO in acidolysis slag
42H
2the growth of O crystal, makes it grow into thick column crystal, can improve filter cake average quality resistivity α
m, improve boron-rich slag acidolysis slurries and filter; The auxiliary agent of calcic interpolation simultaneously can be converted into precipitated calcium silicate by silicic acid sol, reduces the content of acid hydrolysis solution mesosilicic acid colloidal sol, and the silicone content in product boric acid is reduced, and improves the quality of products.
The invention has the beneficial effects as follows: the mixture of lime and calcium salt of take be to add auxiliary agent and boron-rich slag acidolysis slurry reaction, not only can improve the filtration of boron-rich slag acidolysis slip, reduce the moisture content of acidolysis slag, the yield of raising boron, the interpolation auxiliary agent of calcic also can react with the silicic acid sol in acidolysis slip simultaneously, silicone content in acid hydrolysis solution is reduced, improve the quality of product boric acid.Adopt this method that boric acid quality product was filtered and improved in the boron-rich slag acidolysis of paigeite of improving, the filtration velocity of acidolysis slip can reach 1.5～3.0M
3/ m
2h (in acidolysis slip), SiO in boric acid product
2content is lower than 0.05%.Aforesaid method operation is implemented simple, and cost is lower, has solved acid system and has processed the shortcoming that boron-rich slag acidolysis slurry filtration is difficult, product boric acid silicone content is high and the boron rate of recovery is low.
Embodiment
For further understanding present method, below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
500g 120 orders are contained to B
2o
3in the reactor that the boron-rich slag of blast furnace of 18.5% (weight) and 1.65 premium on currency join 3 liters, then adding 0.35 liter of concentration is the vitriol oil of 93% (weight), reaction mixture was warming up to 90 ℃ of stirring reactions after 1 hour, add 30g 80 object limestone dusts and 5g anhydrous calciumsulphate, at 90 ℃, continue stirring reaction 30 minutes, mixed slurry is heated to 95 ℃ of vacuum filtrations, filtration time 5 minutes.Analytical results shows: the leaching yield of boron is 95.2%, and the leaching yield of magnesium is 90.7%; SiO in product boric acid
2content is lower than 0.01% (weight).
Embodiment 2
800g 80 objects are contained to B
2o
3in the acidolysis reaction device that the boron-rich slag of electric furnace of 15.8% (weight) and 2.8 premium on currency join 4.5 liters, by the concentration of 0.5 liter, be then that the vitriol oil of 93% (weight) joins in said mixture at twice; Add first 0.40 liter of vitriol oil, be warming up to 95 ℃ of stirring reactions after 30 minutes, add again 0.10 liter of remaining strong sulfuric acid response 35 minutes, then add 15g to contain slaked lime, 40g 90 order limestone dusts and the 3g nitrocalcite of calcium oxide 70.1%, continuation reaction aging at 95 ℃ filtered after 25 minutes, filtration time 7.5 minutes.Analytical results is as follows: the leaching yield 93.4% of boron-rich slag boron, the leaching yield 94.5% of magnesium; SiO in product boric acid
2content is lower than 0.03% (weight).
Embodiment 3
1000g 160 objects are contained to B
2o
3in the acidolysis reaction device that the boron-rich slag of blast furnace of 20.6% (weight) and 3.5 premium on currency join 5 liters, then the vitriol oil that is 93% (weight) by 0.8 liter of concentration joins in above-mentioned reaction mixture, and be warming up to 95 ℃ reaction 40 minutes, then add 9g to contain commercial lime, 60g 90 order limestone dusts and the 2g calcium chloride hexahydrate of calcium oxide 95%, continuation reaction aging at 95 ℃ filtered after 10 minutes, filtration time 6.5 minutes.Analytical results is as follows: the leaching yield 92.5% of boron-rich slag boron, the leaching yield 90.3% of magnesium; SiO in product boric acid
2content is lower than 0.04% (weight).
Embodiment 4
1500g 60 objects are contained to B
2o
3in the acidolysis reaction device that 13.6% the boron-rich slag of electric furnace and 4.8 premium on currency join 7.5 liters, after dispersed with stirring, the vitriol oil that is 93% (weight) by 1.1 liters of concentration joins in above-mentioned solidliquid mixture; Be warming up to 95 ℃ of stirring reactions after 50 minutes, add 50g to contain industrial slaked lime and the 3g terra alba of calcium oxide 70.1%, continuation is reacted after 20 minutes and is added 60g industry slaked lime again at 95 ℃, and ageing is filtered while hot after 15 minutes, filtration time 7 minutes.Analytical results is as follows: the leaching yield 89.5% of boron-rich slag boron, the leaching yield 87.4% of magnesium; SiO in product boric acid
2content is lower than 0.01%.
Claims (3)
1. improve the boron-rich slag acidolysis of paigeite and filter and improve a method for boric acid quality product, it is characterized in that: with sulfuric acid, to decompose granularity be 60-350 order, containing B
2o
3the boron-rich slag that weight percentage is 10～20%, MgO weight percentage is 30～55%, CaO weight percentage is 2～15%, at normal pressure and room temperature～110 ℃, employing weight is that lime and the calcium salt admixture of boron-rich slag gross weight 1%～25% is interpolation auxiliary agent, make to add the sulfuric acid reaction in auxiliary agent and boron-rich slag acidolysis slip, generate the CaSO that a kind of length-to-diameter ratio is larger
42H
2o rhabdolith; Add auxiliary agent simultaneously and also react with the silicic acid sol in boron-rich slag acidolysis slip, generate a kind of insoluble Calucium Silicate powder.
2. according to a kind of method that boric acid quality product was filtered and improved in the boron-rich slag acidolysis of paigeite of improving claimed in claim 1, it is characterized in that: described boron-rich slag is the separated boron-rich slag obtaining of paigeite blast furnace, or the separated boron-rich slag obtaining of paigeite electric furnace.
3. according to a kind of method that boric acid quality product was filtered and improved in the boron-rich slag acidolysis of paigeite of improving claimed in claim 1, it is characterized in that: in described interpolation auxiliary agent, lime is unslaked lime, slaked lime, limestone dust or their mixture, described calcium salt is calcium sulfate, nitrocalcite, calcium chloride or their mixture.
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|---|---|---|---|
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110067238.2A CN102689908B (en) | 2011-03-20 | 2011-03-20 | Method for improving acidolysis and filtration of boron-riched paigeite slag and improving quality of boric acid product |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3917801A (en) * | 1974-01-03 | 1975-11-04 | United States Borax Chem | Flotation of boric acid from sodium sulfate obtained during the processing of borate ores |
| CN1130595A (en) * | 1995-03-03 | 1996-09-11 | 大连理工大学 | Comprehensive utilization method for decomposition of B-Mg-Fe ore with sulfuric acid |
| CN101549876A (en) * | 2009-05-15 | 2009-10-07 | 东北大学 | Method for producing boric acid and co-produce magnesium hydrate and calcium sulphate by utilizing boron-rich slag |
-
2011
- 2011-03-20 CN CN201110067238.2A patent/CN102689908B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3917801A (en) * | 1974-01-03 | 1975-11-04 | United States Borax Chem | Flotation of boric acid from sodium sulfate obtained during the processing of borate ores |
| CN1130595A (en) * | 1995-03-03 | 1996-09-11 | 大连理工大学 | Comprehensive utilization method for decomposition of B-Mg-Fe ore with sulfuric acid |
| CN101549876A (en) * | 2009-05-15 | 2009-10-07 | 东北大学 | Method for producing boric acid and co-produce magnesium hydrate and calcium sulphate by utilizing boron-rich slag |
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| CN102689908A (en) | 2012-09-26 |
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