CN1775689A - Sintering process sodium aluminate solution desilicification method - Google Patents
Sintering process sodium aluminate solution desilicification method Download PDFInfo
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- CN1775689A CN1775689A CN 200510124011 CN200510124011A CN1775689A CN 1775689 A CN1775689 A CN 1775689A CN 200510124011 CN200510124011 CN 200510124011 CN 200510124011 A CN200510124011 A CN 200510124011A CN 1775689 A CN1775689 A CN 1775689A
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- white residue
- desiliconization
- desiliconizing
- solution
- solid
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000005245 sintering Methods 0.000 title claims abstract description 17
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910001388 sodium aluminate Inorganic materials 0.000 title claims abstract description 15
- 230000008569 process Effects 0.000 title claims description 36
- 239000007788 liquid Substances 0.000 claims abstract description 29
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000013078 crystal Substances 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims abstract description 19
- 238000001704 evaporation Methods 0.000 claims abstract description 12
- 230000008020 evaporation Effects 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 19
- 239000010703 silicon Substances 0.000 claims description 19
- 239000002002 slurry Substances 0.000 claims description 14
- 239000000920 calcium hydroxide Substances 0.000 claims description 13
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 13
- 230000004913 activation Effects 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 abstract description 36
- 210000002966 serum Anatomy 0.000 abstract description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000004571 lime Substances 0.000 abstract 2
- 239000008267 milk Substances 0.000 abstract 2
- 210000004080 milk Anatomy 0.000 abstract 2
- 235000013336 milk Nutrition 0.000 abstract 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 1
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 1
- 239000010413 mother solution Substances 0.000 abstract 1
- 238000005498 polishing Methods 0.000 abstract 1
- 238000001994 activation Methods 0.000 description 11
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 9
- 239000000404 calcium aluminium silicate Substances 0.000 description 9
- 229940078583 calcium aluminosilicate Drugs 0.000 description 9
- 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 8
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 8
- 238000000498 ball milling Methods 0.000 description 6
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- -1 calcium aluminosilicate hydrates Chemical class 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 210000000582 semen Anatomy 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical class O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 description 1
- 229940115440 aluminum sodium silicate Drugs 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000010951 particle size reduction Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000007420 reactivation Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000429 sodium aluminium silicate Substances 0.000 description 1
- 235000012217 sodium aluminium silicate Nutrition 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Abstract
The invention relates to a method for desiliconizing sodium aluminate solution by sintering, relating to a method for updating desiliconized residues and desiliconizing during two-stage desiliconization normal pressure desiliconizing-lime milk adding depth desiliconizing in the alumina producing course, characterized in firstly mixing silicon residues with sorting evaporation mother solution, polishing to complete the surface updating of the silicon residues, then adopting the silicon residues with updated surfaces as crystal seeds, and making normal pressure desiliconization on the conditions of temperature 98 deg.C-105 deg.C, activated crystal seeds of silicon residues 80-100 g/l, desiliconizing original liquor alpha K 1.45-1.52 and desiliconizing time 4-5 hours. After separated from the normal pressure desiliconizing pulp, the solid acts as desiliconizing crystal seeds and the residual solution is separated into two flows: one flow is processed by sorting resolution and the other flow is deeply desiliconized by addition of lime milk, and the solid liquid separation is made on the serum: the PaCO2 estimation is made on the obtained solution and the silicon residues are distributed by sintering. The method has simple flow and low processing energy consumption.
Description
Technical field
A kind of sintering process sodium aluminate solution desilicification method relates to alumina-producing method.
Background technology
In alumina by sintering was produced, the existing pre-desiliconization of the normal pressure-middle pressure that is generally was pressed three sections desilication process that boil desiliconization-Jia milk of lime deep desilication.β-2CaOSiO in the grog process in leaching
2Decomposed by alkali lye, make SiO
2Enter solution, so that contain SiO in the thick liquid
25～6g/l, siliceous modulus 20～30, these SiO
2Be unsettled, major part is separated out and is entered aluminium hydroxide in decomposition course, influences quality product, must set up independent desiliconization process that thick liquid is carried out desiliconization and handle, to be met the wrought aluminum acid sodium solution of decomposition process requirement.The essence of sodium aluminate solution desilicification process is exactly the SiO that makes in the solution
2Changing the very little compound precipitation of solubleness into separates out.Desilication method can be divided into two classes: a class is to make SiO
2Become hydrated aluminum silicate and separate out, another kind of is to make most of SiO
2After becoming hydrated aluminum silicate and separating out, make all the other SiO again
2Become the deep desilication that calcium aluminosilicate hydrate is further separated out.
In alumina by sintering was produced, adopting more desiliconization mode was three sections desilication process: at first add the white residue crystal seed at 95～100 ℃ of temperature, crystal seed amount 50～70g/l, desiliconization dope α by thick liquid
K1.45～1.52, carry out the pre-desiliconization of thick liquid under 3～4 hours the condition of desiliconization time, make the sodium aluminate solution siliceous modulus reach 80～100, in 150～160 ℃ of temperature, 45 minutes condition of desiliconization time are finished, press again and boil desiliconization, make the sodium aluminate solution siliceous modulus reach 400～450, after the liquid-solid separation of slurries, solution is at 95 ℃ of temperature, f
CaOFinish under 5～7g/l, 1～2 hour the condition of desiliconization time and add the milk of lime deep desilication, the sodium aluminate solution siliceous modulus is reached more than 600.There is following deficiency in this technology: the one, and technological process of production complexity, the 2nd, middle pressure presses the enforcement of boiling desilication process that energy consumption in the aluminum oxide production process, the steam consumption are significantly increased.
Summary of the invention
Purpose of the present invention is exactly to produce three sections existing deficiencies of desilication process technology at alumina by sintering, and the sintering process sodium aluminate solution desilicification method of two sections desiliconizations that a kind of technical process is simple, process energy consumption reduces is provided.
The present invention is achieved by the following technical solutions.
A kind of sintering process sodium aluminate solution desilicification method, it is characterized in that desiliconization process is: divide mother liquid evaporation to be mixed into the slurries of L/S3～4 through the white residue that filter carries out after the solid-liquid separation with planting in the white residue slurries behind the thick liquid atmospheric silicon removing, adding steel ball in ball mill ground 8～10 minutes, separate after finishing the Surface Renewal of white residue, the solution after the separation send kind of branch to decompose or a deep desilication; The white residue that Surface Renewal after separating is handled is done crystal seed, at 98～105 ℃ of temperature, activation white residue crystal seed amount 80～100g/l, desiliconization dope α
K1.45～1.52, carry out atmospheric silicon removing under 4～5 hours the condition of desiliconization time; Again with after the atmospheric silicon removing slurries solid-liquid separation, the solid white residue with plant divide mother liquid evaporation mixings a release grinding machine finish the white residue Surface Renewal do desiliconization brilliant with; Solution after the separation is divided into two plumes: a plume send kind of branch to decompose, and another plume is f at 95～98 ℃ of temperature, effective CaO content
CaOAdd the milk of lime deep desilication under 7～8g/l, 1～2 hour the condition of desiliconization time, the slurries solid-liquid separation, solution send the carbon branch, and white residue send the sintering process batching.
The mechanism of sintering process sodium white residue Surface Renewal technology is: at first, in desiliconization process, add white residue and do the difficulty that crystal seed has avoided the sodium aluminium silicate nucleus to be difficult to form, and increase the crystallization area, reach the purpose that improves desiliconization efficient.White residue is through grinding the back particle size reduction, and specific surface area increases, thereby pre-desiliconization efficient is significantly improved.This is that seed size is thin more because the crystal seed that adds is adsorbed on the nucleus active surface hydrated aluminum silicate molecule in the sodium aluminate solution as nucleus separates out, and the surface-area of nucleus is big more, and desiliconization speed is fast more; Simultaneously, in desiliconization process, add under the situation of same grain weight, nucleus quantity increases in the levigate Surface Renewal activation white residue of unit volume, and the crystal seed total surface area increases, and helps the carrying out of desilication reaction, thereby improves the desiliconization degree of depth.Therefore, compare, adopt levigate activatory white residue to do crystal seed and carry out atmospheric silicon removing, the siliceous modulus that can make solution after the desiliconization 80～100 bringing up to more than 300 before activate with original desilication process.
In addition, white residue Surface Renewal activation back is compared with former white residue, and the phase composite of white residue thing is constant substantially, but sodium white residue wherein reduces mutually, and calcium aluminosilicate hydrate increases mutually.This is because have in activation sodium white residue and have a large amount of calcium aluminosilicate hydrates, because calcium aluminosilicate hydrate is with unreacted Ca (OH) still
2Be core, there not to be SiO in the binding soln
2Calcium aluminate be inner casing, be the solid solution pellet of shell with the calcium aluminosilicate hydrate, in white residue Surface Renewal activation treatment process, calcium aluminosilicate hydrate sosoloid by broken from becoming calcium aluminosilicate hydrate, calcium aluminate or Ca (OH)
2, calcium aluminate or Ca (OH)
2Again rapidly and the SiO in the activation treatment solutions employed medium
2Generate calcium aluminosilicate hydrate sosoloid, make SiO in the solution
2Content sharply reduces, because hydrated aluminum silicate and calcium aluminosilicate hydrate solubleness differ greatly, hydrated aluminum silicate is dissolving rapidly again, is carrying out two processes of desiliconization and hydrated aluminum silicate dissolving in the ie in solution simultaneously, SiO in solution
2Concentration reaches new balance.
In sodium white residue Surface Renewal reactivation process, the solution medium difference of employing has certain influence to activating back sodium white residue thing phase composite.By to doing the pre-desiliconization effect of crystal seed relatively after the activation such as different media such as the overflow of sodium white residue subsider, kind branch mother liquid evaporation, determine under study for action with α
kWhen higher kind steaming mother does solution medium processing sodium white residue, there is not sodium aluminate solution generation self-decomposition in the white residue of activation back, avoided Al (OH)
3Enter the slag phase.
Method of the present invention, two sections desilication process of employing atmospheric silicon removing-Jia milk of lime deep desilication is characterized in that adopting the white residue of Surface Renewal activation processes processing to do crystal seed, at 98～105 ℃ of temperature, activation crystal seed amount 80～100g/l, desiliconization dope α
K1.45～1.52, carry out atmospheric silicon removing under 4～5 hours the condition of desiliconization time, this moment, the siliceous modulus of solution reached more than 300, can satisfy kind of the requirement of branch seminal fluid.After atmospheric silicon removing slurries solid-liquid separation, white residue mixes to grind with kind branch mother liquid evaporation finishes the white residue Surface Renewal; Solution after the separation is divided into two plumes, and one send kind of branch to decompose, and another strand is at 95～98 ℃ of temperature, f
CaOAdd the milk of lime deep desilication under 5～7g/l, 1～2 hour the condition of desiliconization time, the siliceous modulus of solution reaches more than 600, can satisfy the requirement that carbon divides seminal fluid.The sintering process sodium aluminate solution desilicification method of two sections desiliconizations that method flow of the present invention is simple, process energy consumption reduces.
Embodiment
A kind of sintering process sodium aluminate solution desilicification method, be to divide mother liquid evaporation to be mixed into the slurries of L/S3～4 through the white residue that filter carries out after the solid-liquid separation with planting in the white residue slurries behind the thick liquid atmospheric silicon removing during desiliconization, adding steel ball in ball mill ground 8～10 minutes, separate after finishing the Surface Renewal of white residue, the solution after the separation send kind of branch to decompose or a deep desilication; The white residue that Surface Renewal after separating is handled is done crystal seed, at 98～105 ℃ of temperature, activation white residue crystal seed amount 80～100g/l, desiliconization dope α
K1.45～1.52, carry out atmospheric silicon removing under 4～5 hours the condition of desiliconization time; With after the atmospheric silicon removing slurries solid-liquid separation, the solid white residue divides mother liquid evaporation mixing release grinding machine to finish the white residue Surface Renewal with kind again; Solution after the separation is divided into two plumes: a plume send kind of branch to decompose, and another plume is f at 95～98 ℃ of temperature, effective CaO content
CaOAdd the milk of lime deep desilication under 7～8g/l, 1～2 hour the condition of desiliconization time, the slurries solid-liquid separation, solution send the carbon branch, and white residue send the sintering process batching.
Embodiment 1
1, raw material:
White residue: mean particle size 26.3 μ m, specific surface area 0.284m
2/ g
Crude liquor used sinter method: Al
2O
3128g/l, siliceous modulus 22
2, CONTROL PROCESS technical qualification:
(1) white residue Surface Renewal: white residue divides mother liquid evaporation mixed serum L/S:4 with kind
Ball milling grinds the ball amount of joining: the 3.0Kg/L mixed serum
Ball milling grinds the time: 10min
(2) one sections atmospheric silicon removings: temperature: 102 ℃
Crystal seed amount: 90g/l
Desiliconization dope: α
K1.45
Desiliconization time: 4 hours
(3) two sections add the milk of lime deep desilication:
Temperature: 97 ℃
Temperature: 97 ℃
f
CaO：6g/l
Desiliconization time: 2 hours
3, technico-economical comparison:
(1) white residue after the Surface Renewal: granularity: 12.33 μ m
Specific surface area: 0: 575m
2/ g
(2) one sections atmospheric silicon removing: Al
2O
3121g/l, siliceous modulus 305
(3) two sections add milk of lime deep desilication: Al
2O
3114g/l, siliceous modulus 605
Embodiment 2
1, raw material:
White residue: mean particle size 26.3 μ m, specific surface area 0.284m
2/ g
Crude liquor used sinter method: Al
2O
3128g/l, siliceous modulus 22
2, CONTROL PROCESS technical qualification:
(1) white residue Surface Renewal: white residue divides mother liquid evaporation mixed serum L/S:3.5 with kind
Ball milling grinds the ball amount of joining: the 3.5Kg/L mixed serum
Ball milling grinds the time: 10min
(2) one sections atmospheric silicon removings: temperature: 105 ℃
Crystal seed amount: 100g/l
Desiliconization dope: α
K1.45
Desiliconization time: 5 hours
(3) two sections add the milk of lime deep desilication:
Temperature: 97 ℃
f
CaO：8g/l
Desiliconization time: 1 hour
3, technico-economical comparison:
(1) white residue after the Surface Renewal: granularity: 10.75 μ m
Specific surface area: 0.581m
2/ g
(2) one sections atmospheric silicon removing: AO119g/l, siliceous modulus 314
(3) two sections add milk of lime deep desilication: Al
2O
3112g/l, siliceous modulus 612
Embodiment 3
1, raw material
White residue: mean particle size 26.6m, specific surface area 0.284m
2/ g
2, CONTROL PROCESS technical qualification:
(1) white residue Surface Renewal: white residue divides mother liquid evaporation mixed serum L/S:3 with kind
Ball milling grinds the ball amount of joining: the 3.5Kg/L mixed serum
Ball milling grinds the time: 8min
(2) one sections atmospheric silicon removings: temperature: 98 ℃
Crystal seed amount: 80g/l
Desiliconization dope: α
K1.52
Desiliconization time: 5 hours
(3) two sections add the milk of lime deep desilication:
Temperature: 98 ℃
f
CaO：7g/l
Desiliconization time: 2 hours
3, technico-economical comparison:
(1) white residue after the Surface Renewal: granularity: 10.55 μ m
Specific surface area: 0.581m
2/ g
(2) one sections atmospheric silicon removing: AO119g/l, siliceous modulus 314
(3) two sections add milk of lime deep desilication: Al
2O
3112g/l, siliceous modulus 612.
Claims (1)
1, a kind of sintering process sodium aluminate solution desilicification method, it is characterized in that desiliconization process is: divide mother liquid evaporation to be mixed into the slurries of L/S3～4 through the white residue that filter carries out after the solid-liquid separation with planting in the white residue slurries behind the thick liquid atmospheric silicon removing, adding steel ball in ball mill ground 8～10 minutes, separate after finishing the Surface Renewal of white residue, the solution after the separation send kind of branch to decompose or a deep desilication; The white residue that Surface Renewal after separating is handled is done crystal seed, under 98～105 ℃ of temperature, activation white residue crystal seed amount 80～100g/l, desiliconization dope α K1.45～1.52,4～5 hours condition of desiliconization time, carry out atmospheric silicon removing; With after the atmospheric silicon removing slurries solid-liquid separation, the solid white residue is finished the white residue Surface Renewal with kind branch mother liquid evaporation mixing release grinding machine and is made the desiliconization crystal seed again; Solution after the separation is divided into two plumes: a plume send kind of branch to decompose, and another plume is f at 95～98 ℃ of temperature, effective CaO content
CaOAdd the milk of lime deep desilication under 7～8g/l, 1～2 hour the condition of desiliconization time, the slurries solid-liquid separation, solution send the carbon branch, and white residue send the sintering process batching.
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| CNB2005101240111A CN100361897C (en) | 2005-11-28 | 2005-11-28 | Sintering process sodium aluminate solution desilicification method |
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|---|---|---|---|
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| CN1775689A true CN1775689A (en) | 2006-05-24 |
| CN100361897C CN100361897C (en) | 2008-01-16 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396614C (en) * | 2006-06-14 | 2008-06-25 | 中国铝业股份有限公司 | Method for desiliconizing green liquor of sodium aluminate under normal pressure |
| CN102225778A (en) * | 2011-01-06 | 2011-10-26 | 内蒙古大唐国际再生资源开发有限公司 | Method for production of alumina, joint product of cement and joint product of 4A zeolite molecular sieve with high aluminum fly ash |
| CN102951667A (en) * | 2012-11-26 | 2013-03-06 | 中国铝业股份有限公司 | Method for desilicating sodium aluminate solution |
| CN105836776A (en) * | 2016-03-24 | 2016-08-10 | 中国铝业股份有限公司 | Active silicon slag, preparation method thereof, and desilication method for silicon-containing sodium aluminate |
| CN110563011A (en) * | 2019-09-12 | 2019-12-13 | 西南能矿集团股份有限公司 | Desiliconization agent for preparing alumina and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095444C (en) * | 1999-07-05 | 2002-12-04 | 中国长城铝业公司中州铝厂 | Intensified sintering process for alumina production |
| CN1147430C (en) * | 2000-04-26 | 2004-04-28 | 中南工业大学 | Process for desiliconizing crude liquid obtained by sinter method |
| CN1235801C (en) * | 2003-04-18 | 2006-01-11 | 中国铝业股份有限公司 | Crude liquid desilicon method for producing aluminium oxide |
| CN1267354C (en) * | 2004-05-14 | 2006-08-02 | 中国铝业股份有限公司 | Desilication method for sodium aluminate solution with high concentration |
-
2005
- 2005-11-28 CN CNB2005101240111A patent/CN100361897C/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396614C (en) * | 2006-06-14 | 2008-06-25 | 中国铝业股份有限公司 | Method for desiliconizing green liquor of sodium aluminate under normal pressure |
| CN102225778A (en) * | 2011-01-06 | 2011-10-26 | 内蒙古大唐国际再生资源开发有限公司 | Method for production of alumina, joint product of cement and joint product of 4A zeolite molecular sieve with high aluminum fly ash |
| CN102951667A (en) * | 2012-11-26 | 2013-03-06 | 中国铝业股份有限公司 | Method for desilicating sodium aluminate solution |
| CN102951667B (en) * | 2012-11-26 | 2014-06-11 | 中国铝业股份有限公司 | Method for desilicating sodium aluminate solution |
| CN105836776A (en) * | 2016-03-24 | 2016-08-10 | 中国铝业股份有限公司 | Active silicon slag, preparation method thereof, and desilication method for silicon-containing sodium aluminate |
| CN110563011A (en) * | 2019-09-12 | 2019-12-13 | 西南能矿集团股份有限公司 | Desiliconization agent for preparing alumina and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN100361897C (en) | 2008-01-16 |
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