CN100347085C - Sintering process of separating red mud for alumina production - Google Patents
Sintering process of separating red mud for alumina production Download PDFInfo
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- CN100347085C CN100347085C CNB2005100032249A CN200510003224A CN100347085C CN 100347085 C CN100347085 C CN 100347085C CN B2005100032249 A CNB2005100032249 A CN B2005100032249A CN 200510003224 A CN200510003224 A CN 200510003224A CN 100347085 C CN100347085 C CN 100347085C
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- liquor
- red mud
- alumina
- filtering
- reach
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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 12
- 238000005245 sintering Methods 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 238000000034 method Methods 0.000 title abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 238000005406 washing Methods 0.000 claims abstract description 8
- 239000011362 coarse particle Substances 0.000 claims abstract description 4
- 239000010419 fine particle Substances 0.000 claims abstract description 4
- 239000006210 lotion Substances 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 5
- 239000004927 clay Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 8
- 229910001948 sodium oxide Inorganic materials 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract 2
- 238000004090 dissolution Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000005432 seston Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000010517 secondary reaction Methods 0.000 description 2
- -1 Polypropylene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 229910001710 laterite Inorganic materials 0.000 description 1
- 239000011504 laterite Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The present invention discloses a red mud separating method for alumina production by a sintering method. In the present invention, digested slurry of clinkers from a clinker digesting process step is loaded into a cyclone for rotational flow grading; the feed pressure of the cyclone is controlled between 0.245 to 0.255MPa so that coarse particle high-solid liquor containing slurry is discharged through a bottom flowing opening of the cyclone and flushed into a bottom flowing tank by washing liquor, and fine particle low-solid liquor containing slurry is loaded into a bag filter; red mud is separated from a solution through a filtering medium, separated filter residues are flushed into the bottom flowing tank by the washing liquor, and filtering liquor flows into a coarse liquor tank. The present invention has the advantages of reasonable flow, short time and stability of red mud separation, high digesting rate of alumina and sodium oxide, low float content of the filtering liquor, high degree of operation automation, etc. The time of red mud separation can be shortened to be within two minutes, the digesting rate of alumina can reach 92%, the digesting rate of sodium oxide can reach 94%, and the content of floats in the filtering liquor can reach 2 g/l.
Description
Technical field:
The present invention relates to a kind of sintering process of separating red mud of alumina producing.
Technical background:
At present, sintering process is produced the general settlement separate Technology of flocculation agent that adopts of alumina laterite separation both at home and abroad, though this technology is simple to operate, but clinker quality, dissolution fluid alumina concentration, alkali concn, fine grinding degree etc. are required harsh, the separating effect instability fluctuates with the fluctuation of clinker quality, dissolution fluid alumina concentration, alkali concn.Simultaneously, this technology exists grows (15 minutes) duration of contact of dissolution fluid and red mud, and the critical defect that the secondary reaction loss is big causes the solubility rate of aluminum oxide, sodium oxide low, is respectively about 85%, 92%, has reduced the rate of recovery of aluminum oxide and sodium oxide.In addition, settlement separate after, the seston of overflow (foreign matter content) can only reach 5g/l.
Summary of the invention:
The objective of the invention is to: a kind of sintering process of separating red mud is provided, the red mud disengaging time is shortened greatly, reduce the secondary reaction loss, improve the solubility rate of aluminum oxide and sodium oxide; Secondly, by adopting filtration medium, reduce solution viscosity and fine grinding degree to the red-mud settlement Effect on Performance, thereby solved the difficult problem that can't improve dissolution fluid aluminum oxide, sodium oxide concentration that is present in the flocculating settling sepn process, and then improve the dissolution fluid cycle efficiency, to solve prior art problems.
The present invention is achieved in that grog stripping slurries are sent into swirler carries out cyclone classification,, makes the coarse particles height contain slurries admittedly and gets rid of from the swirler underflow opening at 0.245～0.255MPa by control swirler feed pressure, pours the underflow groove with washing lotion; Fine particle is low to be contained slurries admittedly and enters bag filter, and medium is with red mud and solution separating after filtration, and the filter residue after the separation pours the underflow groove with washing lotion, and filtrate enters thick liquid bath.
Described filtration medium is a filter cloth.
The present invention compared with prior art, it is reasonable to have flow process, the red mud disengaging time is short and stable, the solubility rate height of aluminum oxide and sodium oxide, the filtrate seston is low, the operating automation degree advantages of higher.The red mud disengaging time can shorten in 2 minutes, and digesting efficiency of alumina can reach 92%, and the sodium oxide solubility rate reaches 94%, and the filtrate seston can reach in the 2g/l.
Description of drawings:
Accompanying drawing 1 is a process flow sheet of the present invention.
Embodiment:
Embodiments of the invention: will send into swirler from the grog stripping slurries that grog stripping operation is come and carry out cyclone classification, control swirler feed pressure is between 0.245～0.255Mpa, make the coarse particles height contain slurries admittedly and get rid of, pour the underflow groove with washing lotion from the swirler underflow opening; Fine particle is low to be contained slurries admittedly and enters bag filter, and with red mud and solution separating, the filter residue after the separation pours the underflow groove with washing lotion through filter cloth (Polypropylene), and filtrate enters thick liquid bath.
Claims (2)
1, a kind of red clay separation process for alumina sintering production, it is characterized in that: grog stripping slurries are sent into swirler carry out cyclone classification, by controlling the swirler feed pressure at 0.245～0.255MPa, make the coarse particles height contain slurries admittedly and get rid of, pour the underflow groove with washing lotion from the swirler underflow opening; Fine particle is low to be contained slurries admittedly and enters bag filter, and medium is with red mud and solution separating after filtration, and the filter residue after the separation pours the underflow groove with washing lotion, and filtrate enters thick liquid bath.
2, according to the described red clay separation process for alumina sintering production of claim 1, it is characterized in that: described filtration medium is a filter cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100032249A CN100347085C (en) | 2005-09-28 | 2005-09-28 | Sintering process of separating red mud for alumina production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100032249A CN100347085C (en) | 2005-09-28 | 2005-09-28 | Sintering process of separating red mud for alumina production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1772617A CN1772617A (en) | 2006-05-17 |
| CN100347085C true CN100347085C (en) | 2007-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100032249A Active CN100347085C (en) | 2005-09-28 | 2005-09-28 | Sintering process of separating red mud for alumina production |
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| CN (1) | CN100347085C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371248C (en) * | 2006-07-16 | 2008-02-27 | 山东铝业股份有限公司 | Red mud separating method for alumina producing Bayer process |
| CN101844785A (en) * | 2010-06-13 | 2010-09-29 | 中国铝业股份有限公司 | Sintering method of Bayer process red mud burden with low silica alumina ratio |
| CN103663512A (en) * | 2012-08-31 | 2014-03-26 | 沈阳铝镁设计研究院有限公司 | Aluminum oxide clinker leaching process |
| CN109439023A (en) * | 2018-11-07 | 2019-03-08 | 张勇 | A technique for functional filler production is carried out using red mud |
| CN114873923B (en) * | 2022-03-28 | 2023-08-22 | 中铝山东有限公司 | Red mud-based heat insulation material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1370741A (en) * | 2002-03-26 | 2002-09-25 | 贵州铝厂 | Red clay separation process for alumina sintering production |
| CN1562757A (en) * | 2004-03-31 | 2005-01-12 | 中国铝业股份有限公司 | Method for separating alumina and vaporizing sodium carbonate in mother liquor |
-
2005
- 2005-09-28 CN CNB2005100032249A patent/CN100347085C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1370741A (en) * | 2002-03-26 | 2002-09-25 | 贵州铝厂 | Red clay separation process for alumina sintering production |
| CN1562757A (en) * | 2004-03-31 | 2005-01-12 | 中国铝业股份有限公司 | Method for separating alumina and vaporizing sodium carbonate in mother liquor |
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| Publication number | Publication date |
|---|---|
| CN1772617A (en) | 2006-05-17 |
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