CN101486476B - Merging and separation method for medium-pressure desiliconisation slurry by sintering method and dissolved mineral slurry by bayer process - Google Patents
Merging and separation method for medium-pressure desiliconisation slurry by sintering method and dissolved mineral slurry by bayer process Download PDFInfo
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- CN101486476B CN101486476B CN2008100686190A CN200810068619A CN101486476B CN 101486476 B CN101486476 B CN 101486476B CN 2008100686190 A CN2008100686190 A CN 2008100686190A CN 200810068619 A CN200810068619 A CN 200810068619A CN 101486476 B CN101486476 B CN 101486476B
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- slurry
- pressure
- bayer
- bayer process
- desiliconisation
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000004131 Bayer process Methods 0.000 title claims abstract description 37
- 239000002002 slurry Substances 0.000 title claims abstract description 21
- 238000005245 sintering Methods 0.000 title claims abstract description 20
- 238000000926 separation method Methods 0.000 title claims abstract description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 title description 7
- 239000011707 mineral Substances 0.000 title description 7
- 238000005406 washing Methods 0.000 claims abstract description 14
- 238000007865 diluting Methods 0.000 claims abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 15
- 229910052710 silicon Inorganic materials 0.000 claims description 15
- 239000010703 silicon Substances 0.000 claims description 15
- 238000010790 dilution Methods 0.000 claims description 9
- 239000012895 dilution Substances 0.000 claims description 9
- 239000006210 lotion Substances 0.000 claims description 9
- 210000002966 serum Anatomy 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 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
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000004090 dissolution Methods 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 210000000582 semen Anatomy 0.000 description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 6
- 238000007670 refining Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 229910001388 sodium aluminate Inorganic materials 0.000 description 3
- 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 2
- 239000002253 acid Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910001710 laterite Inorganic materials 0.000 description 2
- 239000011504 laterite Substances 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910001948 sodium oxide Inorganic materials 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a confluence and separation method of medium-pressure desiliconisation slurry with a sintering method and dissolved ore slurry with a Bayer process, wherein, the slurry obtained after medium-pressure desiliconisation in the desiliconisation process of a sintering method is sent into a Bayer-process diluting tank and mixed and diluted with the dissolved ore slurry with the Bayer process and partial Bayer-process red mud washing solution, and then put into a back dissolution trough. After the adoption of the method, the production process for preparing alumina with a mixed combination method is simplified; and after the medium-pressure desiliconisation, the sintering method is integrated to a Bayer process system, and all the subsequent processes of the sintering method are cancelled. Equipment investment, maintenance cost and labor cost are saved, with quite significant economic benefits. Additionally, the method of the invention effectively increases the system concentration of alumina production with the mixed combination method, improves the unit productivity of equipment and the output capacity of alumina, saves steam consumption during the evaporation process and reduces the production cost of alumina.
Description
Technical field:
The invention belongs to the producing alumina by mixed combined process technical field, pressure-off silicon slip and bayer process ' s digested slurry interflow and separation method in particularly a kind of sintering process.
Background technology:
The main technique flow process of the mixed combining method alumina producing factory that China is present is: the Bayer process part, and high aluminium ore enters high pressure dissolving out process behind the raw material mill, and after the high pressure stripping, dissolved mineral slurry adds the washing lotion of settlement separate washing procedure and dilutes.Thick liquid after dilution gained seminal fluid after the leaf filter carries out seed and decomposes, thereby produces aluminium hydroxide, gets the finished product aluminum oxide after roasting.The sintering process part, general aluminium ore enters the grog firing process behind the raw material mill.The grog that burns till after the grog stripping, enters the red mud separating, washing operation, through in behind the pressure-off silicon, carry out sedimentation and filter.The sedimentation overflow obtains seminal fluid after the leaf filter, seminal fluid carries out producing aluminium hydroxide after carbon divides, and gets the finished product aluminum oxide after roasting; Or the sedimentation overflow mixes with the sodium aluminate solution (seminal fluid) of Bayer process output, send seed to decompose mixed sodium aluminate solution or carbonating is decomposed.Sedimentation underflow (white residue) after the separation send the sintering process batching after reducing moisture after filtration.Like this, a series of manufacturing procedures such as filtration refining through leaf filter settlement separate, thick liquid, the underflow white residue that slip in the process behind the pressure-off silicon not only needs, just can obtain purified sodium aluminate solution, and system's concentration lower (alumina concentration in the seminal fluid generally has only about 120 grams per liters), the circulating fluid volume of unit product is big, thereby causes the production capacity of equipment to descend.
The producing alumina by mixed combined process Technology, through continuing to optimize and innovating for many years, many technico-economical comparisones have reached better level.But exposed many shortcomings simultaneously: technological process of production complexity, system's concentration is low, and seminal fluid decomposition output capacity is low, the energy consumption height, the FU production capacity is low, and cost is higher.These drawbacks become restriction mixed combining method alumina producer and put forward one of principal element of producing consumption reduction.
Summary of the invention:
The technical problem to be solved in the present invention is:
The invention provides pressure-off silicon slip and bayer process ' s digested slurry interflow and separating technology in a kind of sintering process, to solve prior art processes flow process complexity, system's concentration is low, energy consumption height, technical problem such as the FU production capacity is low.
The present invention takes following technical scheme:
Slip behind the pressure-off silicon in the sintering process desiliconization process with after Bayer process stripping operation dissolved mineral slurry mixes, is entered the stripping pit.Therefore, sintering process is incorporated the Bayer process system into behind middle pressure-off silicon, sintering process subsequent handling cancel all, maintenance, maintenance and the labour cost of having saved equipment.
Slip behind the middle pressure-off silicon is sent in the Bayer process dilution trap and bayer process ' s digested slurry and Bayer process red mud washing lotion mixed diluting.Like this, can reduce the add-on of Bayer process red mud washing lotion, every 1M
3Dissolved mineral slurry can add Bayer process red mud washing lotion 0.2～0.5M less
3Therefore, the diluent concentration of Bayer process is improved greatly, the solution flow that passes through in the subsequent handling increases few, but that production capacity has increased is many, thereby the power consumption of unit product, the also corresponding minimizing of the steam consumption.
Above-mentioned mixed serum enters the stop of stripping pit further to be mixed and desiliconization in 3～4 hours, mixed slurry after the desiliconization is with being pumped into the settlement separate groove of Bayer process, carry out settlement separate, sending into leaf filter after overflow after the separation (thick liquid) is pumped up, to carry out the leaf filter refining, the purified aluminum acid sodium solution (seminal fluid) that leaf filter is obtained after refining send seed to decompose again or carbonating is decomposed, underflow after the separation (main component is a red mud) arrives the laterite washing system with centrifugal pumping, carry out backflush 4～5 times with hot water, to reclaim aluminum oxide and the sodium oxide in the wastewater from red mud, red mud wash liquor send Bayer process dilution trap dilution dissolved mineral slurry, and red mud then send red mud dump or send sintering process preparation charge pulp.
Above-mentioned desiliconization slip and mixed serum adopt impeller pump to carry.
The present invention compared with prior art has following advantage:
1, simplified the production technique of producing alumina by mixed combined process, sintering process is incorporated the Bayer process system into behind middle pressure-off silicon, sintering process subsequent handling cancel all.Pressure-off silicon slip does not need operations such as filtration refining through leaf filter settlement separate, thick liquid, the underflow white residue in the sintering process, investment, maintenance cost and the labour cost of having saved equipment, and economic benefit is very obvious.
2, the slip of the present invention after with middle pressure-off silicon sent in the Bayer process dilution trap and bayer process ' s digested slurry and Bayer process red mud washing lotion mixed diluting, reduced the add-on of Bayer process red mud washing lotion, improved system's concentration of producing alumina by mixed combined process effectively, improve FU production capacity and aluminum oxide output capacity, save the evaporative process steam consumption, reach the purpose of Increasing Production and Energy Saving consumption reduction, reduced manufacturing cost of aluminum oxide.
Description of drawings:
Accompanying drawing 1 is a process flow diagram of the present invention.
Embodiment
Embodiments of the invention:
Slip behind the middle pressure-off silicon is sent in the Bayer process dilution trap and bayer process ' s digested slurry and part Bayer process red mud washing lotion mixed diluting, the every 1M of the add-on of Bayer process red mud washing lotion with impeller pump
3Dissolved mineral slurry reduces 0.3M
3And then with pump mixed serum is sent into the stripping pit and stopped 4 hours, further mix and desiliconization.Mixed slurry after the desiliconization is with being pumped into the settlement separate groove of Bayer process, carry out settlement separate, sending into leaf filter after overflow after the separation (thick liquid) is pumped up, to carry out the leaf filter refining, and the purified aluminum acid sodium solution (seminal fluid) that the leaf filter is obtained after refining send seed to decompose again or carbonating is decomposed.Underflow after the separation (main component is a red mud) arrives the laterite washing system with centrifugal pumping, carry out backflush 4～5 times with hot water, to reclaim aluminum oxide and the sodium oxide in the wastewater from red mud, red mud wash liquor send Bayer process dilution trap dilution dissolved mineral slurry, and red mud then send red mud dump or send sintering process preparation charge pulp.
Claims (2)
1. pressure-off silicon slip and bayer process ' s digested slurry interflow and separation method in the sintering process is characterized in that: the slip behind the middle pressure-off silicon is sent in the Bayer process dilution trap and bayer process ' s digested slurry and Bayer process red mud washing lotion mixed diluting; Described mixed serum enters the stripping pit and stopped 3～4 hours.
2. pressure-off silicon slip and bayer process ' s digested slurry interflow and separation method in the sintering process according to claim 1 is characterized in that: described desiliconization slip and mixed serum adopt impeller pump to carry.
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| CN2008100686190A CN101486476B (en) | 2008-01-17 | 2008-01-17 | Merging and separation method for medium-pressure desiliconisation slurry by sintering method and dissolved mineral slurry by bayer process |
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| CN2008100686190A CN101486476B (en) | 2008-01-17 | 2008-01-17 | Merging and separation method for medium-pressure desiliconisation slurry by sintering method and dissolved mineral slurry by bayer process |
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| CN101486476B true CN101486476B (en) | 2011-07-27 |
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| CN101880047A (en) * | 2010-06-13 | 2010-11-10 | 中国铝业股份有限公司 | Method for recycling crystalline alkali in unrefined solution full confluence production by sintering process |
| CN103848452B (en) * | 2014-02-25 | 2015-10-07 | 湖南中大冶金设计有限公司 | The Simple treatment method of Bayer process red mud and silica residue in sinter process in producing alumina through series process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1775683A (en) * | 2005-11-25 | 2006-05-24 | 中国铝业股份有限公司 | Method for diluting bayer process stripping ore pulp for alumina production by mixed joint process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1775683A (en) * | 2005-11-25 | 2006-05-24 | 中国铝业股份有限公司 | Method for diluting bayer process stripping ore pulp for alumina production by mixed joint process |
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