CN102107892B - Sulfur discharging method for using high-sulfur bauxite ore in mixed combination method - Google Patents
Sulfur discharging method for using high-sulfur bauxite ore in mixed combination method Download PDFInfo
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- CN102107892B CN102107892B CN200910312068.2A CN200910312068A CN102107892B CN 102107892 B CN102107892 B CN 102107892B CN 200910312068 A CN200910312068 A CN 200910312068A CN 102107892 B CN102107892 B CN 102107892B
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- Prior art keywords
- crystalline alkali
- sulfur
- sulfur bauxite
- alkali
- production process
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 29
- 239000011593 sulfur Substances 0.000 title claims abstract description 29
- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 24
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 238000007599 discharging Methods 0.000 title abstract 2
- 239000003513 alkali Substances 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 238000005245 sintering Methods 0.000 claims abstract description 15
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000005864 Sulphur Substances 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 238000002425 crystallisation Methods 0.000 claims description 4
- 230000008025 crystallization Effects 0.000 claims description 4
- 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 1
- 239000002253 acid Substances 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract description 2
- 235000011152 sodium sulphate Nutrition 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 238000010792 warming Methods 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical group [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a sulfur discharging method for using high-sulfur bauxite ore in a mixed combination method. Thirty percent to sixty percent of crystalline alkali precipitated in an evaporation procedure in an aluminum oxide production process is shunted, and when the sulfur content is reduced in the production process, the part of crystalline alkali is used for burdening material with a sintering method, so that the part of crystalline alkali returns to the production flow; the shunted crystalline alkali is stored for a short time by utilizing an idle settling tank; and as the crystalline alkali can be solidified, when the crystalline alkali needs to be returned to the flow, all that is needed is to start a steam warming system and a raking machine system of the settling tank to enable the solidified crystalline alkali to become liquid crystalline alkali again, so that the crystalline alkali can be returned to a production system in a conveyed manner by adopting a pump and a pipeline. Through suspending the use of the high-sulfur bauxite ore, namely, discontinuously using the high-sulfur bauxite ore, when the content of sodium sulfate is smaller than or equal to 5 g/l in the aluminum oxide production process, the part of shunted crystalline alkali is returned to the sintering method production flow, thereby achieving the aims of discontinuously or partially using the high-sulfur bauxite ore and reasonably utilizing aluminum ore resources.
Description
Technical field
The invention belongs to technical field of alumina production, particularly a kind of mixed combining method uses the desulphurization method of high-sulfur bauxite.
Background technology:
In aluminum oxide production process, sulphur is a kind of very harmful impurity, and it not only has corrosive nature to equipment, and it also can cause the consumption of alkali, and 1 kilogram of sulphur need consume 3.4 kilograms of soda ash.Along with the decline of bauxite resource grade, some high-sulfur bauxites also are just attempted utilizing, and to use high-sulfur bauxite, first will there is good desulphurization method, the main desulphurization method of mixed combining method is to utilize sintering process at present, by improving the coal amount of mixing (raw mix with coal fed desulphurization is one of great technological achievement of China's sintering process production aluminum oxide) of charge pulp, make it in sintering process, the sulphur in aluminum ore and fuel is transformed into FeS and enter waste red mud residues, thereby reach desulphurization object.But the coal mixing in raw material is conditional, be that the coal amount that raw material mix accounts for greatly 15～20% of whole fuel, mix and easily cause too much calcining kiln " race coal " (to refer to that coal dust firing is incomplete, and together with waste gas, discharge chamotte kiln with carbon monoxide form with coal dust), the flow velocity of slip in kiln accelerated, kiln temperature raising difficulty, can not ensure the Quality and yield of grog.And raw mix with coal fed desulphurization is also limited, the ratio that removes of desulphurization generally only has 30%～40% left and right.The sulphur exceeding can constantly accumulate in whole mixed combining method production system, cause mother liquid evaporation device heat transfer efficiency decline production capacity to reduce, a large amount of sulphate crystals is separated out (accounting for the more than 60% of vitriol in vaporizing raw liquor) in evaporative process simultaneously, the vitriol of crystallization returns to sintering process batching makes again charge pulp sulphur content raise, it is large that high-sulfur charge pulp shows as temperature of kiln head fluctuation in clinkersintering operation, kliner coating extends, kiln condition shakiness.Calcining kiln feed opening sizing is frequent and form ring formation, large egg etc., and eliminate them has not only increased labour intensity, and has a strong impact on clinker quality, output.
Along with the expansion of present alumina producing scale, aluminum oxide ore resource day is becoming tight.Low sulfur-containing ore is fewer and feweri, and adopts high-sulfur ore to produce aluminum oxide, and the problems referred to above are obvious, have a strong impact on alumina producing, thereby cause high-sulfur bauxite almost can not be used for alumina producing.
Summary of the invention:
The technical problem that will solve of the present invention is:
A kind of desulphurization method that provides mixed combining method to use high-sulfur bauxite, to solve the series of problems producing when available technology adopting high-sulfur ore is produced aluminum oxide, can apply in alumina producing high-sulfur bauxite.
The present invention takes following technical scheme:
By a crystalline alkali shunting part of separating out in aluminum oxide production process evaporization process out, in the time that reducing, sulphur content in production process again this partial crystallization alkali is prepared burden for sintering process, thereby in returning alumina Production Flow Chart.The amount of described crystalline alkali shunting is 30～60% of the crystalline alkali total amount separated out.
The idle subsider of crystalline alkali utilization of shunting was deposited as the short period of time.Because crystalline alkali can be solidified, during by its Returning process, only need start steam heating system and the rake machine system of subsider at needs, make curing crystalline alkali again become liquid state, make it return to production system thereby can adopt pump and pipeline to carry.
Use high-sulfur bauxite by time-out, be interrupted and use high-sulfur bauxite, the sulphur content in Production Flow Chart is reduced.In the time of sodium sulphate content≤5 grams per liter in alumina producing flow process, then this partial crystallization alkali distributing is turned back in sintering process Production Flow Chart and gone.Be interrupted or partly use high-sulfur bauxite thereby reach, rationally utilizing the object of bauxite resource.
Compared with prior art, tool has the following advantages in the present invention:
1, can be interrupted or partly use high-sulfur bauxite, thereby rationally utilizing bauxite resource.
2, the idle subsider of crystalline alkali utilization of shunting was deposited as the short period of time.Because crystalline alkali can be solidified, during by its Returning process, only need start steam heating system and the rake machine system of subsider at needs, make curing crystalline alkali again become liquid state, make it return to production system thereby can adopt pump and pipeline to carry.
Brief description of the drawings:
Fig. 1 is process flow diagram of the present invention.
The specific embodiment of the present invention:
Embodiment mono-:
Have 50% to flow to idle subsider 3 by 2 points of crystalline alkali transferpumps and do of short duration storage the crystalline alkali of separating out in mother liquid evaporation process 1, remaining crystalline alkali is transported to sintering process alkali red mud storage tank 5 and then is sent to sintering process batching by sintering process alkali red mud transferpump 6 by crystalline alkali transferpump 2 (passing through valve regulated); In the time that sulphur content is reduced to 4.5 grams per liter in alumina producing flow process, (use high-sulfur bauxite by time-out, be interrupted and use high-sulfur bauxite), only need start steam heating system and the rake machine system of subsider, make curing crystalline alkali again become liquid state, mix with Bayer red mud thereby can adopt crystalline alkali transferpump 4 to be sent in sintering process alkali red mud storage tank 5, and then be sent to sintering process with sintering process alkali red mud transferpump 6 and prepare burden.
Claims (3)
1. the desulphurization method of a mixed combining method use high-sulfur bauxite, it is characterized in that: by a crystalline alkali shunting part of separating out in aluminum oxide production process evaporization process out, in the time that reducing, sulphur content in production process again this partial crystallization alkali is prepared burden for sintering process, thereby in returning alumina Production Flow Chart; Be interrupted and use high-sulfur bauxite, in aluminum oxide production process, when the grams per liter of Liu acid sodium Han Liang≤5, the crystalline alkali of shunting is returned to Production Flow Chart again.
2. mixed combining method according to claim 1 uses the desulphurization method of high-sulfur bauxite, it is characterized in that: the amount of described crystalline alkali shunting is 30～60% of the crystalline alkali total amount separated out.
3. mixed combining method according to claim 1 uses the desulphurization method of high-sulfur bauxite, it is characterized in that: the idle subsider of crystalline alkali utilization of shunting was deposited as the short period of time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910312068.2A CN102107892B (en) | 2009-12-23 | 2009-12-23 | Sulfur discharging method for using high-sulfur bauxite ore in mixed combination method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910312068.2A CN102107892B (en) | 2009-12-23 | 2009-12-23 | Sulfur discharging method for using high-sulfur bauxite ore in mixed combination method |
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| Publication Number | Publication Date |
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| CN102107892A CN102107892A (en) | 2011-06-29 |
| CN102107892B true CN102107892B (en) | 2014-09-03 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110028091A (en) * | 2018-05-31 | 2019-07-19 | 沈阳铝镁设计研究院有限公司 | A kind of Bayer process red mud production aluminium oxide wet laid furnishes dry sintering technique |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182026A (en) * | 2007-12-17 | 2008-05-21 | 中国铝业股份有限公司 | Method for removing sodium sulfate in aluminum oxide production process |
| CN101234771A (en) * | 2007-01-31 | 2008-08-06 | 中国铝业股份有限公司 | Mother liquid evaporation desalting technique in aluminum oxide production |
| CN101289210A (en) * | 2008-06-12 | 2008-10-22 | 中国铝业股份有限公司 | Process for producing aluminum oxide from high-sulfur bauxite |
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2009
- 2009-12-23 CN CN200910312068.2A patent/CN102107892B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234771A (en) * | 2007-01-31 | 2008-08-06 | 中国铝业股份有限公司 | Mother liquid evaporation desalting technique in aluminum oxide production |
| CN101182026A (en) * | 2007-12-17 | 2008-05-21 | 中国铝业股份有限公司 | Method for removing sodium sulfate in aluminum oxide production process |
| CN101289210A (en) * | 2008-06-12 | 2008-10-22 | 中国铝业股份有限公司 | Process for producing aluminum oxide from high-sulfur bauxite |
Non-Patent Citations (4)
| Title |
|---|
| 李刚等.混联法生产过程中硫的行为及排除方法.《有色冶金节能》.2004,第21卷(第5期),第50-52页. |
| 混联法生产过程中硫的行为及排除方法;李刚等;《有色冶金节能》;20041031;第21卷(第5期);第50-52页 * |
| 种分母液蒸发浓度与结晶碱析出关系探讨;赵清法等;《有色冶炼》;20020430(第2（2002年4月）期);第6-8页 * |
| 赵清法等.种分母液蒸发浓度与结晶碱析出关系探讨.《有色冶炼》.2002,(第2（2002年4月）期),第6-8页. |
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