CN100542960C - A kind of treatment process of white residue - Google Patents
A kind of treatment process of white residue Download PDFInfo
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- CN100542960C CN100542960C CNB2007101186614A CN200710118661A CN100542960C CN 100542960 C CN100542960 C CN 100542960C CN B2007101186614 A CNB2007101186614 A CN B2007101186614A CN 200710118661 A CN200710118661 A CN 200710118661A CN 100542960 C CN100542960 C CN 100542960C
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- CN
- China
- Prior art keywords
- white residue
- stripping
- sintering
- grog
- aluminum oxide
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 230000008569 process Effects 0.000 title claims abstract description 38
- 238000005245 sintering Methods 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 239000003513 alkali Substances 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 4
- 239000011734 sodium Substances 0.000 claims description 10
- 238000009835 boiling Methods 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- 239000000284 extract Substances 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 9
- 229910001948 sodium oxide Inorganic materials 0.000 description 9
- 230000029087 digestion Effects 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000001627 detrimental effect Effects 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229960001866 silicon dioxide Drugs 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 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 1
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 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
- SONHSLRCJYJHQE-UHFFFAOYSA-N calcium;silicic acid Chemical group [Ca].[Ca].O[Si](O)(O)O SONHSLRCJYJHQE-UHFFFAOYSA-N 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910001648 diaspore Inorganic materials 0.000 description 1
- DEPUMLCRMAUJIS-UHFFFAOYSA-N dicalcium;disodium;dioxido(oxo)silane Chemical compound [Na+].[Na+].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O DEPUMLCRMAUJIS-UHFFFAOYSA-N 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000011197 physicochemical method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Abstract
A kind of treatment process of white residue relates to the sintering process white residue treatment process in a kind of integrated process aluminum oxide production process, particularly extracts the method for aluminum oxide, recovery alkali from the sintering process white residue.It is characterized in that be with the white residue behind the sodium aluminate solution desilicification with after carbon mother liquid mixes, after drying, sintering, the cooling, the white residue grog is delivered to the stripping groove, with alkali lye in the stripping groove through after stirring stripping, send solid-liquid separation system.Method of the present invention requires low, alumina recovery rate height to equipment material, can reclaim the method for aluminum oxide and alkali economically from white residue.
Description
Technical field
A kind of treatment process of white residue relates to the sintering process white residue treatment process in a kind of integrated process aluminum oxide production process.
Background technology
Alumina-producing method is broadly divided into four classes, i.e. alkaline process, acid system, using acid and alkali combination method and Re Fa.Be used for the industrial alkaline process that belongs to entirely at present, alkaline process is produced aluminum oxide and is divided into bayer's process, sintering process and Baeyer-multiple flow processs such as sintering integrated process again.
China's bauxite mainly belongs to diaspore type, and medium grade is main, and wherein alumina silica ratio (A/S) is that 4～8 ore accounts for about 80% of total amount.Therefore, sintering process is occupied bigger proportion in the alumina producing of China.Sintering process for alumina production, its technological process comprise that raw material preparations, grog burn till, grog stripping, desiliconizing crude liquid obtained, carbonating decomposition etc.Owing to contain the SiO2 of 5-6g/l in the crude liquor used sinter method, must could remove this part impurity by independent desiliconizing crude liquid obtained operation.
Contain useful components such as more sodium oxide and aluminum oxide in the white residue that is produced in the process for desiliconizing crude liquid obtained by sinter process, the conventional sintering method adopts the white residue method of batching later, to reclaim the aluminum oxide and the sodium oxide of white residue.But a large amount of white residues return feed proportioning system once more, through operations such as grog sintering, stripping, desiliconizations, form inner invalid circulation, have reduced sintering process part effective capacity, and every consumption is raise, and production cost increases.
The white residue that produces in the desiliconizing crude liquid obtained process being adopted physicochemical method individual curing, reclaims wherein useful component aluminum oxide and alkali, avoid the batching later of a large amount of white residues to form inner invalid circulation, is the problem that people are studying always.
Since last century the fifties, the wet method aluminium silicon separation technology of sodium white residue is studied always by USSR (Union of Soviet Socialist Republics), Hungary and China, produces the aluminum oxide novel process to form high pressure water chemical method or Bayer-aquation method.Main achievement has: 1) USSR (Union of Soviet Socialist Republics) ripple Nuo Maliefu-Sa Ren etc. is by to Na
2O-Al
2O
3-SiO
2-CaO-H
2O be the balance solid phase researched and proposed the high pressure water chemical method, its principle is to make silicon (260～350 ℃) under higher temperature generate the slag phase that does not contain (or containing less) aluminium or alkali, as sodium calcium silicate, calcium silicate hydrate, molten iron fossil garnet etc., aluminum oxide then enters solution with the form of sodium aluminate.This method alkali recovery is greater than 80%, and the alumina recovery rate is 40～70%.But higher, the high (α of causticity ratio of alkali concn in the solution
k10～30), need High Temperature High Pressure, equipment material is required too harsh; 2) hydrothermal method that proposes of Czech, Hungary scholar, just (α under than the former loose slightly condition
k4.0 about) reclaim the alkali in the red mud, and the alumina recovery rate is low, the red mud alumina silica ratio after the processing is still greater than 1, and is unreasonable economically.
Summary of the invention
The objective of the invention is deficiency, a kind of, alumina recovery rate height low to the equipment material requirement is provided, the method that from white residue, reclaims aluminum oxide and alkali of economical rationality at above-mentioned prior art existence.
The objective of the invention is to be achieved through the following technical solutions.
A kind of treatment process of white residue, it is characterized in that be with the white residue behind the sodium aluminate solution desilicification with after carbon mother liquid mixes, after drying, sintering, the cooling, the white residue grog is delivered to the stripping groove, with alkali lye in the stripping groove through after stirring stripping, send solid-liquid separation system.
The treatment process of a kind of white residue of the present invention is agglomerating in the boiling sintering oven under 900 ℃ of-1300 ℃ of temperature after it is characterized in that white residue and carbon mother liquid mixing.
The treatment process of a kind of white residue of the present invention is characterized in that white residue mixes with carbon mother liquid to make the white residue raw-meal ingredient be: [N]/[R]=0.9-1.0; [C]/[S]=1.3-1.7.
Method of the present invention, the white residue slurry is 900-1300 ℃ of sintering temperature in the boiling sintering oven, makes each composition interreaction in the white residue slurries, and the pulverulent material that bonding forms is the particulate materials-grog with certain bulk density and voidage.With grog and alkali lye in the stripping groove through stirring stripping, aluminum oxide in the grog and sodium oxide are dissolved in to greatest extent produce sodium aluminate solution in the solution, white residue grog aluminum oxide net digestion efficiency is not less than 89%, the sodium oxide net digestion efficiency is not less than 95%.The stripping slurries send solid-liquid separation system to separate, and make the detrimental impurity 2CaO.SiO in useful component aluminum oxide, sodium oxide and the solid in the solution in the stripping slurries
2Separate as early as possible.
White residue and part carbon mother liquid blended purpose are to reduce alumina content in the white residue attached liquid, increase sodium oxide content in the white residue slurries, so that the white residue slurries are in sintering process, aluminum oxide with sodium aluminate, silicon-dioxide with the combination of dicalcium silicic acid form, thereby realize that silicon, aluminium separate.
The white residue slurries are 900-1300 ℃ of agglomerating purpose, make each composition interreaction in the white residue slurries.Wherein aluminum oxide changes the compound N a of soluble in water or dilute alkaline soln into
2O.Al
2O
3, silicon-dioxide is transformed into the compound 2CaO.SiO of water insoluble substantially or dilute alkaline soln
2, and the particulate materials-grog that pulverulent material is bonded to have certain bulk density and voidage, so that in next step process in leaching, useful component is separated with detrimental impurity, extract aluminum oxide to greatest extent and reclaim alkali.
White residue grog and alkali lye are the aluminum oxide in the grog and sodium oxide be dissolved in to greatest extent through the purpose that stirs stripping in the stripping groove produces sodium aluminate solution in the solution, white residue grog aluminum oxide net digestion efficiency is not less than 89%, and the sodium oxide net digestion efficiency is not less than 95%.
The stripping slurries send the purpose of solid-liquid separation system to be, make the detrimental impurity 2CaO.SiO in useful component aluminum oxide, sodium oxide and the solid in the solution in the stripping slurries
2Separate as early as possible.
The treatment process of a kind of white residue of the present invention requires low, alumina recovery rate height to equipment material, can reclaim the method for aluminum oxide and alkali economically from white residue.
Embodiment
A kind of treatment process of white residue, it is characterized in that be with the white residue behind the sodium aluminate solution desilicification with after carbon mother liquid mixes, white residue is mixed with carbon mother liquid makes the white residue raw-meal ingredient be: [N]/[R]=0.9-1.0; [C]/[S]=1.3-1.7; After drying, sintering, the cooling, the white residue grog is delivered to the stripping groove, after process stirs stripping in the stripping groove with alkali lye, send solid-liquid separation system.Its white residue with after carbon mother liquid mixes be agglomerating in the boiling sintering oven under 900 ℃ of-1300 ℃ of temperature.
Embodiment 1
One, manufacturing condition:
1, white residue slurries
Mix white residue slurry water ratio 46%
White residue raw material [N]/[R] ([N]/[R]=[Na
2O]/[Fe
2O
3]+[Al
2O
3]) 1.0
White residue raw material [C]/[S] ([C]/[S]=[CaO]/[SiO
2]) 1.6
2, grog sintering
1000 ℃ of white residue grog sintering temperatures
Sintering time 30～60s
3, grog stripping
85 ℃ of stripping temperature
Stripping L/S 4-4.5
Dissolution time 30min
Two, technical indicator:
White residue grog standard solubility rate: Al
2O
395.25%
Na
2O 96.6％
White residue grog net digestion efficiency: Al
2O
389.48%
Na
2O 95.19％
The red-mud settlement index:
Embodiment 2
One, manufacturing condition:
1, white residue slurries
Mix white residue slurry water ratio 46%
White residue raw material [N]/[R] 0.92
White residue raw material [C]/[S] 1.7
2, grog sintering
1050 ℃ of white residue grog sintering temperatures
Sintering time 30～60s
3, grog stripping
85 ℃ of stripping temperature
Stripping L/S 4-4.5
Dissolution time 30min
Two, technical indicator:
White residue grog standard solubility rate: Al
2O
395.48%
Na
2O 96.8％
White residue grog net digestion efficiency: Al
2O
390.12%
Na
2O 95.84％
The red-mud settlement index:
Embodiment 3
One, manufacturing condition:
1, white residue slurries
Mix white residue slurry water ratio 46%
White residue raw material [N]/[R] 0.98
White residue raw material [C]/[S] 1.35
2, grog sintering
1100 ℃ of white residue grog sintering temperatures
Sintering time 30～60s
3, grog stripping
85 ℃ of stripping temperature
Stripping solid-to-liquid ratio L/S 4-4.5
Dissolution time 30min
Two, technical indicator:
White residue grog standard solubility rate: Al
2O
395.95%
Na
2O 97.2％
White residue grog net digestion efficiency: Al
2O
390.89%
Na
2O 95.88％
The red-mud settlement index:
Claims (3)
1. the treatment process of a white residue, it is characterized in that be with the white residue behind the sodium aluminate solution desilicification with after carbon mother liquid mixes, after drying, sintering, the cooling, the white residue grog is delivered to the stripping groove, after process stirs stripping in the stripping groove with alkali lye, send solid-liquid separation system.
2. the treatment process of a kind of white residue according to claim 1 is agglomerating in the boiling sintering oven under 900 ℃ of-1300 ℃ of temperature after it is characterized in that white residue and carbon mother liquid mixing.
3. the treatment process of a kind of white residue according to claim 1 is characterized in that white residue mixes with carbon mother liquid to make the white residue raw-meal ingredient be: [Na
2O]/[Fe
2O
3]+[Al
2O
3]=0.9-1.0; [CaO]/[SiO
2]=1.3-1.7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101186614A CN100542960C (en) | 2007-07-12 | 2007-07-12 | A kind of treatment process of white residue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101186614A CN100542960C (en) | 2007-07-12 | 2007-07-12 | A kind of treatment process of white residue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101121537A CN101121537A (en) | 2008-02-13 |
| CN100542960C true CN100542960C (en) | 2009-09-23 |
Family
ID=39084065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101186614A Active CN100542960C (en) | 2007-07-12 | 2007-07-12 | A kind of treatment process of white residue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100542960C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485282A (en) * | 2018-12-24 | 2019-03-19 | 江西双龙硅材料科技有限公司 | A kind of processing method for producing liquid sodium silicate and generating silicon slag |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031516A (en) * | 1988-06-30 | 1989-03-08 | 王立卓 | A kind of Wingdale (lime) sintering process that is suitable for high aluminium silicon ratio bauxite |
| CN1326821A (en) * | 2001-07-12 | 2001-12-19 | 柳云珍 | Process for treating silicon slag |
| CN1597529A (en) * | 2004-05-14 | 2005-03-23 | 中国铝业股份有限公司 | Silicon slag treatment method in aluminium oxide production process |
-
2007
- 2007-07-12 CN CNB2007101186614A patent/CN100542960C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031516A (en) * | 1988-06-30 | 1989-03-08 | 王立卓 | A kind of Wingdale (lime) sintering process that is suitable for high aluminium silicon ratio bauxite |
| CN1326821A (en) * | 2001-07-12 | 2001-12-19 | 柳云珍 | Process for treating silicon slag |
| CN1597529A (en) * | 2004-05-14 | 2005-03-23 | 中国铝业股份有限公司 | Silicon slag treatment method in aluminium oxide production process |
Non-Patent Citations (2)
| Title |
|---|
| 硅渣与拜耳法赤泥一起洗涤工艺探讨. 蔺迎征等.有色矿冶，第17卷第1期. 2001 |
| 硅渣与拜耳法赤泥一起洗涤工艺探讨. 蔺迎征等.有色矿冶，第17卷第1期. 2001 * |
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| Publication number | Publication date |
|---|---|
| CN101121537A (en) | 2008-02-13 |
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Effective date of registration: 20201103 Address after: 454174 Zhongzhou aluminum factory, Qixian town, Xiuwu County, Jiaozuo City, Henan Province Patentee after: Chalco Zhongzhou Aluminium Industry Co.,Ltd. Patentee after: Chinalco Zhongzhou new Mstar Technology Ltd. Address before: 100082 Beijing, Xizhimen, North Street, No. 62, No. Patentee before: ALUMINUM CORPORATION OF CHINA Ltd. |