CN1329297C - Red mud slurry heating method and apparatus for alumina production - Google Patents
Red mud slurry heating method and apparatus for alumina production Download PDFInfo
- Publication number
- CN1329297C CN1329297C CNB2005100032253A CN200510003225A CN1329297C CN 1329297 C CN1329297 C CN 1329297C CN B2005100032253 A CNB2005100032253 A CN B2005100032253A CN 200510003225 A CN200510003225 A CN 200510003225A CN 1329297 C CN1329297 C CN 1329297C
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- China
- Prior art keywords
- red mud
- mud slurry
- well heater
- steam
- feedbox
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000002002 slurry Substances 0.000 title claims abstract description 46
- 238000010438 heat treatment Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 19
- 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 8
- 238000004519 manufacturing process Methods 0.000 title abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 206010039509 Scab Diseases 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention discloses a method and a device for heating red mud slurry in the process of alumina production. Before entering a washing and settling tank, red mud slurry is partially heated to reach the temperature required by technology, which can improve the settling property and the washing effect of the red mud slurry and can guarantee the stable and high-yield running of the settling tank. Simultaneously, an underflow pump is utilized to convey materials, and steam enters a heater through self pressure; the materials and the steam are in sufficient and direct contact for heat transfer, so that the present invention has the advantages of high heating speed, favorable effect, easy operation and control and energy source saving. The present invention effectively solves the problems of poor effect, large side effect, etc. when steam is directly used for heating materials in the settling tank.
Description
Technical field:
The present invention relates to red mud slurry heating method and equipment in a kind of aluminum oxide production process.
Technical background:
At present, in the settlement separate and washing process of domestic alumina producing red mud slurry, the red mud slurry temperature controlling is one of crucial operative technique condition, because red mud slurry is in the conveying and storage process of necessity, the natural heat dissipation cooling, make temperature not reach settlement separate and processing requirement washing process, production control is had a negative impact, must adopt reasonable manner that it is heated.General at present employing steam directly feeds in the subsider and heats, this mode poor controllability, and heat-up rate is slow, inefficiency, waste of steam is serious; Heating tube is unsuitable too much, also should not stretch in the groove deeply excessively, and therefore, hot spot and the non-hot spot temperature difference are big, make the interior temperature of whole groove unbalanced; The flow process complexity is difficult to operation control; Steam trace stops up easily, the cleaning difficulty; Steam produces very big agitaion directly at subsider internal heating material, is unfavorable for carrying out smoothly of settlement separate and washing process.
Therefore, need to adopt advanced heating means and equipment, guarantee effective heating of red mud slurry, make settlement separate and washing process carries out smoothly.
Summary of the invention:
The objective of the invention is to: provide a kind of in aluminum oxide production process, the heating means of red mud slurry and equipment, make the red mud slurry temperature reach manufacturing technique requirent, the heating efficiency that prior art exists is low to solve, red mud slurry non-uniform temperature, steam are stirred many technical problems such as the settlement separate and washing of influence.
The present invention is achieved in that from the next red mud slurry of a last operation, entering subsider (6) before, it 1/3～1/2 is introduced in the well heater (4) with the steam that enters by pipeline (3) and carries out thorough mixing, after the even heating, enter the feedbox (7) of subsider (6) by pipeline (5), enter subsider (6) by pipeline (11) then.To guarantee that red mud slurry in washing process, reaches the desired slurry temperature of Technology.
On red mud slurry transport pipe (1), open lateral (2), will enter the red mud slurry shunting of feedbox (7), 1/3～1/2 of slip is sent in the well heater (4) by pump (10) and valve (9).
Red mud slurry tangentially enters by the top of pipeline (2) from well heater (4), flows through Cheng Zhongyu in well heater (4) inward turning and carries out thorough mixing from the steam that well heater (4) top duct (3) enters.
From the steam that well heater (4) top duct (3) enters, temperature is controlled between 130 ℃～180 ℃, and by valve (8) dominant discharge.
Its used equipment is red mud slurry transport pipe (1), red mud slurry lateral (2), vapour pipe (3), well heater (4), feedbox (7), subsider (6).Red mud slurry is delivered to feedbox (7) with pump (10) by carrying the person in charge (1), carries to be responsible on (1) at red mud slurry and opens lateral (2), is connected with well heater (4) through valve (9).Steam-pipe (3) links to each other with well heater (4) through valve (8), and well heater (4) links to each other with feedbox (7) by pipeline (5).Feedbox (7) is connected with subsider (6) by pipeline (11).
The present invention compared with prior art has the following advantages:
1, adopt well heater to heat, the efficient height, controllability is strong, has saved a large amount of steam.
2, before entering subsider, heat, make temperature equalisation in the groove, stable, optimized settlement separate and washing process.It is big to have eliminated the subsider temperature difference, and cell wall falls piece and stops up the awl phenomenon at the end.
3, in fill process, control heating, make temperature of charge enter subsider begin settlement separate before, just reached the processing requirement of settlement separate process.And former heating means are the settlement separate of material and heat and carry out simultaneously, and red mud slurry temperature and homogeneity thereof all can't satisfy processing requirement.
4, in fill process, control heating, the stirring that steam produces material in the subsider when having avoided in subsider direct heating, thus can not influence carrying out smoothly of settlement separate and washing process.
5, well heater scabs and lacks, easily cleaning.Former heating means heating tube scabs easily and stops up, and the cleaning difficulty is big.
6, simple, the science of flow process has been improved operational condition, has optimized technical indicator.
Description of drawings:
Accompanying drawing 1 is a synoptic diagram of the present invention
Embodiment:
Embodiments of the invention: because the cooling of the heat radiation in mass transport and the stop process, the red mud slurry temperature that a last operation is come does not reach settlement separate and processing requirement washing process.Therefore, on red mud slurry transport pipe (1), open lateral (2), will enter the red mud slurry shunting of feedbox (7), by valve (9) 1/3～1/2 of slip is sent in the well heater (4) and carried out thorough mixing with the steam that enters by pipeline (3).After the even heating, enter the feedbox (7) of subsider (6) by pipeline (5), after the red mud slurry that directly enters feedbox (7) by pipeline (1) mixes, enter subsider (6) by pipeline (11), to guarantee that red mud slurry in washing process, reaches the desired slurry temperature of Technology.Red mud slurry tangentially enters by the top of pipeline (2) from well heater (4), flows through Cheng Zhongyu in well heater (4) inward turning and carries out thorough mixing from the steam that well heater (4) overhead vapor pipeline (3) enters.From the steam that well heater (4) top duct (3) enters, temperature is controlled between 130 ℃～180 ℃, and by valve (8) dominant discharge, with slip in the control heater temperature.
Claims (5)
1. alumina producing red mud slurry heating method, it is characterized in that: from the next red mud slurry of a last operation, at the feedbox that enters subsider (6) (7) before, it 1/3～1/2 is introduced in the well heater (4) with the steam that enters by pipeline (3) and carries out thorough mixing, after the even heating, enter the feedbox (7) of subsider (6), enter subsider (6) then, to guarantee that red mud slurry in washing process, reaches the desired slurry temperature of Technology.
2. alumina producing red mud slurry heating method according to claim 1, it is characterized in that: red mud slurry tangentially enters by the top of pipeline (2) from well heater (4), flows through Cheng Zhongyu in well heater (4) inward turning and carries out thorough mixing from the steam that well heater (4) top duct (3) enters.
3. alumina producing red mud slurry heating method according to claim 1 is characterized in that: from the steam that well heater (4) top duct (3) enters, temperature is controlled between 130 ℃～180 ℃, and by valve (8) dominant discharge.
4. alumina producing red mud slurry heating method according to claim 1, it is characterized in that: on red mud slurry transport pipe (1), open lateral (2), to enter the red mud slurry shunting of feedbox (7), 1/3～1/2 of slip be sent in the well heater (4) by pump (10) and valve (9).
5. used equipment of alumina producing red mud slurry heating method as claimed in claim 1, it comprises red mud slurry transport pipe (1), red mud slurry lateral (2), vapour pipe (3), well heater (4), feedbox (7), subsider (6); It is characterized in that: red mud slurry is delivered to feedbox (7) with pump (10) by carrying the person in charge (1), carries to be responsible on (1) at red mud slurry and opens lateral (2), is connected with well heater (4) through valve (9).Steam-pipe (3) links to each other with well heater (4) through valve (8), and well heater (4) links to each other with feedbox (7) by pipeline (5), and feedbox (7) is connected with subsider (6) by pipeline (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100032253A CN1329297C (en) | 2005-09-28 | 2005-09-28 | Red mud slurry heating method and apparatus for alumina production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100032253A CN1329297C (en) | 2005-09-28 | 2005-09-28 | Red mud slurry heating method and apparatus for alumina production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1772618A CN1772618A (en) | 2006-05-17 |
| CN1329297C true CN1329297C (en) | 2007-08-01 |
Family
ID=36759786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100032253A Active CN1329297C (en) | 2005-09-28 | 2005-09-28 | Red mud slurry heating method and apparatus for alumina production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1329297C (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1155521C (en) * | 2000-07-26 | 2004-06-30 | 中国铝业股份有限公司 | Directly heating and decomposing plate heat exchanging technology for alumina laterite washing |
-
2005
- 2005-09-28 CN CNB2005100032253A patent/CN1329297C/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1155521C (en) * | 2000-07-26 | 2004-06-30 | 中国铝业股份有限公司 | Directly heating and decomposing plate heat exchanging technology for alumina laterite washing |
Non-Patent Citations (3)
| Title |
|---|
| 实施碳分深度蒸发优化混联法赤泥浆平衡 程涛、杜启忠，河南冶金，第12卷第6期 2004 * |
| 实施碳分深度蒸发优化混联法赤泥浆平衡 程涛、杜启忠，河南冶金，第12卷第6期 2004;氧化铝生产过程中赤泥快速分离的调控方法探析 李云中、闫续房，江苏冶金，第4期 2001 * |
| 氧化铝生产过程中赤泥快速分离的调控方法探析 李云中、闫续房，江苏冶金，第4期 2001 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1772618A (en) | 2006-05-17 |
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