CN100339304C - Sand-like alumina producing method for removing periodic subdivision of species fracture - Google Patents
Sand-like alumina producing method for removing periodic subdivision of species fracture Download PDFInfo
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- CN100339304C CN100339304C CNB200410024131XA CN200410024131A CN100339304C CN 100339304 C CN100339304 C CN 100339304C CN B200410024131X A CNB200410024131X A CN B200410024131XA CN 200410024131 A CN200410024131 A CN 200410024131A CN 100339304 C CN100339304 C CN 100339304C
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- sandy alumina
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 230000000737 periodic effect Effects 0.000 title claims description 11
- 238000000034 method Methods 0.000 title abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 34
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 33
- 239000013078 crystal Substances 0.000 claims abstract description 32
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 26
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 4
- 239000012141 concentrate Substances 0.000 claims description 22
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 14
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 3
- 238000007670 refining Methods 0.000 abstract 3
- 238000001354 calcination Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
- 210000004911 serous fluid Anatomy 0.000 abstract 1
- 239000000047 product Substances 0.000 description 10
- 230000008030 elimination Effects 0.000 description 6
- 238000003379 elimination reaction Methods 0.000 description 6
- 238000005273 aeration Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
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Abstract
The present invention relates to a sandy alumina production method for eliminating periodical refining of speciesdivision. Refined sodium aluminate solution in the process of alumina production is used as raw materials for species division; one part of obtained aluminum hydroxide is used as circular crystal seeds of species division, and the rest of the aluminum hydroxide is used as crystal seeds of carbon division for refining sodium aluminate solution in next step; and after carbonating decomposition, serous fluid is filtered to obtain aluminum hydroxide; then, sand type alumina products are obtained through washing and calcination. The present invention utilizes the species division of aluminum hydroxide, does not need purpose made treatment and directly performs once carbon division treatment; two step operation basically solves the problem of species division refining. The production method is simple and practical, and is favorable for industrial implementation and application.
Description
Technical field
The present invention relates to a kind of sandy alumina production method of eliminating kind of branch periodic thinning, be the aluminum oxide industry production technical field.
Background technology
According to the characteristics of China's bauxite, China alumina producing enterprise all is sintering process, series process or mixed combining method Production Flow Chart usually.The production method of wherein separating out aluminium hydroxide from sodium aluminate solution has carbonating to decompose and crystal seed stirring decomposition.Because it is simple and easy to do that the one-stage process decomposition of crystal seed is produced aluminium hydroxide, is the technology that China alumina producing enterprise generally adopts.The aluminium hydroxide product granularity wave amplitude that one-stage process is produced is big, and+45 μ fluctuate in 20～90%, contain the ultrafine particle of a large amount of-20 μ, and be 1～2 month cycle of fluctuation.Along with the popularization of the large-sized prebaked electrolyzer of electrolysis of aluminum industry and popularizing of dry cleaning electrolytic process flue gas, electrolysis aluminum production enterprises requires the physical indexs such as granularity of metallurgical-grade aluminum oxide to reach the requirement of sandy alumina, and how solving kind of a branch refinement problem is that people pay close attention to always.
Summary of the invention
The object of the present invention is to provide a kind of sandy alumina production method of eliminating kind of branch periodic thinning, simple, be beneficial to industrializing implementation and use.
Elimination kind of the present invention is divided the sandy alumina production method of periodic thinning, be to make raw material with the wrought aluminum acid sodium solution in the aluminum oxide production process, carry out kind of a branch, a gained aluminium hydroxide part is as planting the circulation crystal seed that divides, the crystal seed that all the other aluminium hydroxides divide as next step wrought aluminum acid sodium solution carbon, dope filtration after carbonating is decomposed gets aluminium hydroxide, gets the sandy alumina product through washing, roasting then.
In industrial practice, suitable control condition is:
Plant and divide sodium aluminate concentrate solution, its alumina concentration is 100-160g/l, the causticization ratio (α of solution
k) be 1.45-1.55, rate of decomposition is controlled to be 48～54%.
Plant and divide the crystal seed amount to be controlled to be 450-700g/l;
Planting the branch sodium aluminate concentrate solution is the sodium aluminate concentrate solution of handling through desiliconization, plants and divides the siliceous modulus (A/S) of solution to be controlled to be 250-300;
Plant the decomposition temperature of dividing and be controlled to be 80-90 ℃ of decomposition starting temperature, terminal temperature 65-75 ℃.
It is 100-160g/l that carbon divides the sodium aluminate concentrate solution alumina concentration, the causticization ratio (α of solution
k) be 1.45-1.55.
The carbonation decompsition seed crystal amount is controlled to be 20-60g/l;
It is the sodium aluminate concentrate solution of handling through deep desilication that carbon divides sodium aluminate concentrate solution, and carbon divides the siliceous modulus (A/S) of solution to be controlled to be 700-1000;
Carbon branch decomposition temperature is 85-95 ℃;
Carbon branch rate of decomposition is controlled to be 90-93%.
Directly quote and get final product for implementing the present invention's content same as the prior art,, repeat no more as the temperature of the feeding control of carbon dioxide, decomposition, time etc.
Sandy alumina production method of the present invention, gained alumina product+45 μ＞82%, abrasion index＜25% reaches the technical indicator of sandy alumina.
The present invention utilizes kind of a branch crystallization, need not special processing, directly carries out one time the carbon divisional processing again, and the operation of two steps has solved basically and planted the problem of dividing refinement, and is simple, is beneficial to industrializing implementation and uses.
Description of drawings
Fig. 1, process flow diagram of the present invention.
Embodiment
Embodiment 1
Elimination kind of the present invention is divided the sandy alumina production method of periodic thinning, make raw material with the wrought aluminum acid sodium solution in alkali-lime sinter process aluminum oxide production process, decomposition of crystal seed sodium aluminate refined soln, alumina concentration are 105g/l, the causticization ratio (α of solution
k) 1.47, solution siliceous modulus (A/S) 280 decomposes 90 ℃ of starting temperatures, 75 ℃ of terminal temperatures, and by self-circulation crystal seed amount 550g/l, resolving time 16h, rate of decomposition 52%, product aluminium hydroxide+45 μ content are 56%; Add as crystal seed in the sodium aluminate concentrate solution of deep desilication, this sodium aluminate concentrate solution alumina concentration is 100g/l, the causticization ratio (α of solution
k) 1.45, solution siliceous modulus (A/S) 780, crystal seed amount 40g/l, 90 ℃ of decomposition temperatures, the CO of feeding concentration 38%
2Gas, aeration time 2.5h, rate of decomposition 91.3%.Decompose the aluminium hydroxide obtain after filtration, aftertreatments such as washing, roasting get the finished product aluminum oxide.Product+45 μ content 85.6%, abrasion index 18.7%.
Embodiment 2
Elimination kind of the present invention is divided the sandy alumina production method of periodic thinning, makes raw material with the wrought aluminum acid sodium solution in the aluminum oxide production process, and decomposition of crystal seed sodium aluminate concentrate solution, alumina concentration are 135g/l, the α of solution
k1.50 the A/S of solution is 290, decomposes 85 ℃ of starting temperatures, 71 ℃ of terminal temperatures, and by self-circulation crystal seed amount 500g/l, resolving time 14h, rate of decomposition 51%; Add as crystal seed in the sodium aluminate concentrate solution of deep desilication, this sodium aluminate concentrate solution alumina concentration is 110g/l, the α of solution
k1.52 the A/S of solution is 900, crystal seed amount 30g/l, 88 ℃ of decomposition temperatures, the CO of feeding concentration 33%
2Gas, aeration time 3h, rate of decomposition 92%.Decompose the aluminium hydroxide that obtains and get the finished product aluminum oxide through aftertreatment.
Embodiment 3
Elimination kind of the present invention is divided the sandy alumina production method of periodic thinning, makes raw material with the wrought aluminum acid sodium solution in the aluminum oxide production process, and decomposition of crystal seed sodium aluminate concentrate solution, alumina concentration are 140g/l, the α of solution
k1.53 the A/S of solution is 265, decomposes 82 ℃ of starting temperatures, 66 ℃ of terminal temperatures, and by self-circulation crystal seed amount 530g/l, resolving time 15h, rate of decomposition 51%; Add as crystal seed in the sodium aluminate concentrate solution of deep desilication, this sodium aluminate concentrate solution alumina concentration is 110g/l, the α of solution
k1.51 the A/S of solution is 860, crystal seed amount 50g/l, 89 ℃ of decomposition temperatures, the CO of feeding concentration 35%
2Gas, aeration time 3h, rate of decomposition 92%.Decompose the aluminium hydroxide that obtains and get the finished product aluminum oxide through aftertreatment.
Embodiment 4
Elimination kind of the present invention is divided the sandy alumina production method of periodic thinning, makes raw material with the wrought aluminum acid sodium solution in the aluminum oxide production process, and decomposition of crystal seed sodium aluminate concentrate solution, alumina concentration are 110g/l, the α of solution
k1.51 the A/S of solution is 275, decomposes 84 ℃ of starting temperatures, 68 ℃ of terminal temperatures, and by self-circulation crystal seed amount 620g/l, resolving time 14h, rate of decomposition 52%; Add as crystal seed in the sodium aluminate concentrate solution of deep desilication, this sodium aluminate concentrate solution alumina concentration is 120g/l, the α of solution
k1.50 the A/S of solution is 770, crystal seed amount 55g/l, 87 ℃ of decomposition temperatures, the CO of feeding concentration 36%
2Gas, aeration time 2.5h, rate of decomposition 92%.Decompose the aluminium hydroxide that obtains and get the finished product aluminum oxide through aftertreatment.
Embodiment 5
Elimination kind of the present invention is divided the sandy alumina production method of periodic thinning, makes raw material with the wrought aluminum acid sodium solution in the aluminum oxide production process, and decomposition of crystal seed sodium aluminate concentrate solution, alumina concentration are 110g/l, the α of solution
k1.53 the A/S of solution is 288, decomposes 82 ℃ of starting temperatures, 73 ℃ of terminal temperatures, and by self-circulation crystal seed amount 650g/l, resolving time 14h, rate of decomposition 52%; Add as crystal seed in the sodium aluminate concentrate solution of deep desilication, this sodium aluminate concentrate solution alumina concentration is 130g/l, the α of solution
k1.51 the A/S of solution is 930, crystal seed amount 45g/l, 87 ℃ of decomposition temperatures, the CO of feeding concentration 37%
2Gas, aeration time 2.5h, rate of decomposition 92%.Decompose the aluminium hydroxide that obtains and get the finished product aluminum oxide through aftertreatment.
Claims (10)
1, a kind of sandy alumina production method of eliminating kind of branch periodic thinning, it is characterized in that making raw material with the wrought aluminum acid sodium solution in the aluminum oxide production process, carry out kind of a branch, a gained aluminium hydroxide part is as planting the circulation crystal seed that divides, the crystal seed that all the other aluminium hydroxides divide as next step wrought aluminum acid sodium solution carbon, dope filtration after carbonating is decomposed gets aluminium hydroxide, gets the sandy alumina product through washing, roasting then.
2, sandy alumina production method according to claim 1 is characterized in that kind of a branch sodium aluminate concentrate solution, and its alumina concentration is 100-160g/l, and the causticization ratio of solution is 1.45-1.55, and rate of decomposition is 48～54%.
3, sandy alumina production method according to claim 2 is characterized in that kind of a branch crystal seed amount is controlled to be 450-700g/l.
4, sandy alumina production method according to claim 2 is characterized in that kind of the siliceous modulus of branch solution is 250-300.
5, sandy alumina production method according to claim 2 is characterized in that 80-90 ℃ of the decomposition starting temperature of kind of branch, terminal temperature 65-75 ℃.
6, according to claim 1,2,3,4 or 5 described sandy alumina production methods, it is characterized in that carbon divides sodium aluminate concentrate solution, its alumina concentration is 100-160g/l, and the causticization ratio of solution is 1.45-1.55.
7, sandy alumina production method according to claim 6 is characterized in that the carbonation decompsition seed crystal amount is controlled to be 20-60g/l.
8, sandy alumina production method according to claim 6 is characterized in that it is 700-1000 that carbon divides the solution siliceous modulus of solution.
9, sandy alumina production method according to claim 6 is characterized in that carbon branch decomposition temperature is 85-95 ℃.
10, sandy alumina production method according to claim 6 is characterized in that carbon branch rate of decomposition is controlled to be 90-93%.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200410024131XA CN100339304C (en) | 2004-05-21 | 2004-05-21 | Sand-like alumina producing method for removing periodic subdivision of species fracture |
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| CNB200410024131XA CN100339304C (en) | 2004-05-21 | 2004-05-21 | Sand-like alumina producing method for removing periodic subdivision of species fracture |
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| Publication Number | Publication Date |
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| CN1579944A CN1579944A (en) | 2005-02-16 |
| CN100339304C true CN100339304C (en) | 2007-09-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102328944A (en) * | 2011-07-04 | 2012-01-25 | 中国铝业股份有限公司 | Production method for continuously producing aluminum hydroxide crystal nucleus seed |
| CN102616819A (en) * | 2012-03-30 | 2012-08-01 | 中国铝业股份有限公司 | Method and equipment for regulating and controlling aluminum hydroxide particle size distribution |
| CN113233483A (en) * | 2021-05-22 | 2021-08-10 | 邹平恒嘉新材料科技有限公司 | Preparation method of nano boehmite material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105213A (en) * | 1985-07-06 | 1988-11-16 | 贵州铝厂 | The production method of sandy aluminium hydroxide |
| CN1031690A (en) * | 1987-09-02 | 1989-03-15 | 山东铝厂 | Process for producing sandish aluminium oxide by carbonating decomposition |
| CN1485274A (en) * | 2003-09-02 | 2004-03-31 | 中国铝业股份有限公司 | Sintering process for preparing sand-shape alumina |
-
2004
- 2004-05-21 CN CNB200410024131XA patent/CN100339304C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105213A (en) * | 1985-07-06 | 1988-11-16 | 贵州铝厂 | The production method of sandy aluminium hydroxide |
| CN1031690A (en) * | 1987-09-02 | 1989-03-15 | 山东铝厂 | Process for producing sandish aluminium oxide by carbonating decomposition |
| CN1485274A (en) * | 2003-09-02 | 2004-03-31 | 中国铝业股份有限公司 | Sintering process for preparing sand-shape alumina |
Non-Patent Citations (2)
| Title |
|---|
| 冶金工业出版社 杨重禺，轻金属冶金学，第1期 1991 * |
| 铝酸钠溶液加种子碳酸化分解新工艺 张宝琦，娄东民，轻金属，第12期 1999 * |
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| CN1579944A (en) | 2005-02-16 |
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Owner name: CHINESE ALUMINIUM CO., LTD. Free format text: FORMER OWNER: SHANDONG ALUMINIUM INDUSTRY CO., LTD. Effective date: 20071019 |
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Effective date of registration: 20071019 Address after: 100082 No. 62 North Main Street, Beijing, Xizhimen Patentee after: Aluminum Corporation of China Limited Address before: 255052 No. 1, five km road, Zhangdian District, Shandong, Zibo Patentee before: Shandong Aluminium Industry Co., Ltd. |