CN1631784A - Red mud conveying method - Google Patents
Red mud conveying method Download PDFInfo
- Publication number
- CN1631784A CN1631784A CN 200410100971 CN200410100971A CN1631784A CN 1631784 A CN1631784 A CN 1631784A CN 200410100971 CN200410100971 CN 200410100971 CN 200410100971 A CN200410100971 A CN 200410100971A CN 1631784 A CN1631784 A CN 1631784A
- Authority
- CN
- China
- Prior art keywords
- red mud
- pump
- shearing
- rinse bath
- carrying method
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000010008 shearing Methods 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000012546 transfer Methods 0.000 claims abstract description 3
- 239000002002 slurry Substances 0.000 claims description 15
- 238000013019 agitation Methods 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 2
- 239000012528 membrane Substances 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 230000035611 feeding Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention is a red mud transportation technique, relates to red mud processing techs in aluminum production especially the techs of red mud transportation to tailing dam. It features that feeds the red mud obtained in the aluminum producing process from the washing tank directly to shearing pump, transfers the mud under pressure with triple jar single process membrane pump to the tailing dam after shearing and mixing at high speed till the viscidity reaches 0.03 to 0.07 Pa.s, the pressure assumes to be 3.0 to 16.0 MPa. The technique totally meets the needs of high sold contention, high viscidity transportation, and has got tech features of simple process and low costs.
Description
Technical field
A kind of red mud carrying method relates to the red mud treatment process in a kind of aluminum oxide production process, particularly red mud carrying method.
Background technology
Red mud claims red soil again, is a kind of waste that produces in aluminium hydroxide and the alumina producing.Usually after red mud is isolated, is washed from sodium aluminate solution, need be by pipe-line transportation to other unit.Before the economic and a large amount of problem of utilizing red mud was still unresolved, the method that each big aluminum oxide factory processes of the world is abandoned red mud mainly still effluxes stored up.Traditional method comprises that the alkaline red mud that remote pipe carries pumping to contain admittedly about 25% dilutes slurry, and artificial box dam wet method is stored up (filling out the sea individually).Solution after the sedimentation clarification enters flow process with pumped back factory again and recycles, and this method operational throughput is big, land reclamation is difficult, environmental pollution is difficult to control.
Under the pressure of the more and more stricter environmental protection requirement and the restriction of land resources; dry method discharging with store up nature and become the important development direction of countries in the world industrial waste residue disposal; the slurry liquid-solid ratio that its major requirement is transferred is below 1.0; owing to contain height admittedly; red mud slurry is sent to stockyard wind solarization evaporation a little; can reach solid limit even best saturation state, the backwater amount seldom.
Wet processing relatively, dry method have many significant a bit: operational throughput is few, power consumption is little, storage space is little, and storage capacity is big, seepage is few, it is fast etc. to stablize, reclaim, but the red mud that production process produces because high, have very high viscosity, cause difficulty of transportation.At present, solving the method for dry-method red mud difficulty of transportation, mainly is to adopt red mud slurry to filter, and steel basin dilutes and the force (forcing) pump feeding then, and the problem of existence is that red mud slurry easily scabs in groove seriously, easily causes deep gouge, and it is big to stir maintenance workload simultaneously.
Summary of the invention
The present invention is directed to state the deficiency that prior art is deposited, a kind of red mud carrying method that can effectively reduce red mud operational throughput, reduction water consumption and land seizure, minimizing maintenance workload is provided.The objective of the invention is to be achieved through the following technical solutions.
A kind of red mud carrying method is characterized in that the red mud that aluminum oxide production process produces is directly fed shearing pump from rinse bath, and carrying out high speed shear, to be stirred to viscosity be 30～70 * 10
-3Behind the Pa.s, use the single surge pump positive delivery of three cylinders to tailing dam again, transfer pressure 3.0MPa～16.0MPa.
A kind of red mud carrying method, the solvent and solute weight ratio that it is characterized in that feeding in the rinse bath red mud of shearing pump is 0.5～1.2, slurry temperature is at 85 ℃～100 ℃.
A kind of red mud carrying method, when it is characterized in that shear agitation, the rotating speed of its shearing pump is 960～1440 rev/mins; The rinse bath that refluxes again after the red mud shear agitation feeds shearing pump again and repeats to be trimmed to that viscosity requires.
A kind of red mud carrying method partly is back to rinse bath after the red mud shear agitation when it is characterized in that shear agitation again, the balance pump top hole pressure.
Discover the liquid-solid mass ratio of red mud slurry at 0.5～1.2 o'clock, be a kind of Bingham pseudoplastic fluid.Introduce according to document " ore dressing rheology and application thereof ", pseudoplastic fluid has thixotropy, and when being subjected to big shear action, viscosity and yielding stress sharply descend.Therefore, it is suitable adopt shearing pump to shear reducing viscosity.The research of testing laboratory shows that also this thixotropy is irreversible, if stop to shear, its recovery rate is far below rate of decay, and is difficult to return to initial level.
Method of the present invention, with height contain admittedly, full-bodied red mud slurry adopts shearing pump, carries out shear agitation, reduces viscosity, gives the surge pump feeding simultaneously, the feed pressure that provides surge pump to need is carried tailing dam with pressure then.Fed distance can reach 7～8km, when red mud viscosity is too big, also can a part get back in the preceding rinse bath of charging when pump discharge pressure is too high, strengthens shearing.Simultaneously, when the barrier film air pump inoperative, shearing pump normally moves, and by opening reverse flow valve red mud slurry is all turned back in the rinse bath before the charging.Adopt shearing pump feeding, partial reflux, surge pump pressure carrying method that the height of liquid-solid ratio 0.5～1.2 is contained red mud admittedly and deliver to stockyard or other productive unit outward.Adopt this technology can reach the requirement that height contains admittedly, full-bodied red mud is carried fully.It is simple to have flow process, the technical characterstic that production cost is low.
Description of drawings
Accompanying drawing is the processing unit schematic flow sheet of method of the present invention.
Embodiment
A kind of red mud carrying method, with height contain admittedly, full-bodied red mud slurry adopts shearing pump 3, shears, and reduces viscosity, gives surge pump 5 feedings simultaneously, the feed pressure that provides surge pump 5 to need is then with the single surge pump 5 pressure conveying of three cylinders.When red mud viscosity is too big, also can a part get back in the preceding rinse bath of charging when pump 5 top hole pressures are too high, strengthen shearing.Simultaneously, when surge pump 5 was not worked, shearing pump normally moved, and by opening reverse flow valve 4, red mud slurry was all turned back in the rinse bath 1 before the charging.
Embodiment 1
Red mud slurry L/S1.0, feeding pump top hole pressure 0.6MPa, surge pump top hole pressure 4.5MPa, flow velocity are 0.4m/s, fed distance 7.5km.
Red mud slurry L/S0.9, feeding pump top hole pressure 0.7MPa, surge pump top hole pressure 4.7MPa, flow velocity are 0.5m/s fed distance 7.5km.
Red mud slurry L/S0.8, feeding pump top hole pressure 0.8MPa, surge pump top hole pressure 4.9MPa, flow velocity are 0.6m/s fed distance 7km.
Claims (4)
1. red mud carrying method, its spy is the red mud that aluminum oxide production process produces is directly fed shearing pump from rinse bath, and carrying out high speed shear, to be stirred to viscosity be 30～70 * 10
-3Behind the Pa.s, use the single surge pump positive delivery of three cylinders to tailing dam again, transfer pressure 3.0MPa～6.0MPa.
2. a kind of red mud carrying method according to claim 1, the liquid-solid mass ratio that it is characterized in that feeding in the rinse bath red mud of shearing pump is 0.5～1.2, slurry temperature is at 85 ℃～100 ℃.
3. a kind of red mud carrying method according to claim 1, when it is characterized in that shear agitation, the rotating speed of its shearing pump is 960～1440 rev/mins; The rinse bath that refluxes again after the red mud shear agitation feeds shearing pump again and repeats to be trimmed to that viscosity requires.
4. a kind of red mud carrying method according to claim 1 partly is back to rinse bath, balance pump top hole pressure again after the red mud shear agitation when it is characterized in that shear agitation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410100971 CN1631784A (en) | 2004-12-28 | 2004-12-28 | Red mud conveying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410100971 CN1631784A (en) | 2004-12-28 | 2004-12-28 | Red mud conveying method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1631784A true CN1631784A (en) | 2005-06-29 |
Family
ID=34848053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410100971 Pending CN1631784A (en) | 2004-12-28 | 2004-12-28 | Red mud conveying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1631784A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007009374A1 (en) * | 2005-07-18 | 2007-01-25 | China Aluminum International Engineering Corporation Limited | Technique for conveying and filtering red mud |
| CN1323946C (en) * | 2005-07-27 | 2007-07-04 | 中国铝业股份有限公司 | Shock proof device of diaphragm pump outlet pipe net |
| CN102072402B (en) * | 2009-11-24 | 2012-08-29 | 沈阳铝镁设计研究院有限公司 | Structure for protecting red mud stockyard endless tube in Bayer process |
| CN104791005A (en) * | 2015-04-29 | 2015-07-22 | 北京科技大学 | Storage device and method for improving discharging concentration stability of vertical sand silo |
| CN110734080A (en) * | 2019-12-04 | 2020-01-31 | 青海东台吉乃尔锂资源股份有限公司 | Method for washing lithium carbonate |
| CN110902701A (en) * | 2019-12-04 | 2020-03-24 | 青海东台吉乃尔锂资源股份有限公司 | Device for washing lithium carbonate |
-
2004
- 2004-12-28 CN CN 200410100971 patent/CN1631784A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007009374A1 (en) * | 2005-07-18 | 2007-01-25 | China Aluminum International Engineering Corporation Limited | Technique for conveying and filtering red mud |
| CN100348521C (en) * | 2005-07-18 | 2007-11-14 | 贵阳铝镁设计研究院 | Technique for conveying and filtering red mud |
| CN1323946C (en) * | 2005-07-27 | 2007-07-04 | 中国铝业股份有限公司 | Shock proof device of diaphragm pump outlet pipe net |
| CN102072402B (en) * | 2009-11-24 | 2012-08-29 | 沈阳铝镁设计研究院有限公司 | Structure for protecting red mud stockyard endless tube in Bayer process |
| CN104791005A (en) * | 2015-04-29 | 2015-07-22 | 北京科技大学 | Storage device and method for improving discharging concentration stability of vertical sand silo |
| CN110734080A (en) * | 2019-12-04 | 2020-01-31 | 青海东台吉乃尔锂资源股份有限公司 | Method for washing lithium carbonate |
| CN110902701A (en) * | 2019-12-04 | 2020-03-24 | 青海东台吉乃尔锂资源股份有限公司 | Device for washing lithium carbonate |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |