CN1887713A - Red mud separating, washing and depositing process - Google Patents
Red mud separating, washing and depositing process Download PDFInfo
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- CN1887713A CN1887713A CN 200610103783 CN200610103783A CN1887713A CN 1887713 A CN1887713 A CN 1887713A CN 200610103783 CN200610103783 CN 200610103783 CN 200610103783 A CN200610103783 A CN 200610103783A CN 1887713 A CN1887713 A CN 1887713A
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- Prior art keywords
- red mud
- washing
- groove
- subsider
- separating
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- 238000005406 washing Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000000151 deposition Methods 0.000 title claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 10
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 15
- 230000003068 static effect Effects 0.000 claims description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 7
- 239000011707 mineral Substances 0.000 claims description 7
- 238000000354 decomposition reaction Methods 0.000 claims description 5
- 229910001710 laterite Inorganic materials 0.000 claims description 5
- 239000011504 laterite Substances 0.000 claims description 5
- 238000004062 sedimentation Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 5
- 230000008021 deposition Effects 0.000 abstract 2
- 238000005086 pumping Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 206010039509 Scab Diseases 0.000 description 4
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 239000006210 lotion Substances 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 238000004131 Bayer process Methods 0.000 description 1
- 239000003513 alkali Substances 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
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention discloses red mud separating, washing and depositing process for alumina production. The technological process includes once red mud separation, 3-6 times reverse washing separation. The process includes making ore slurry flow from high position tank to red mud separating deposition tank for separating deposition, decomposing overflowed sodium aluminate solution, 3-6 times reverse washing deposited red mud bottom flow to recover useful components before direct exhausting, and pumping to convey overflow and bottom flow of the depositing tank. The present invention has optimized apparatus configuration, simplified technological process, capacity of obtaining qualified separated overflow and discarded red mud with high solid content and other advantages.
Description
Technical field
A kind of red mud separating, washing and depositing process relates to the red mud separating, washing and depositing process of handling dissolved mineral slurry in the red mud treatment process in the aluminum oxide production process, particularly alumina producing Bayer process process.
Background technology
In alumina producing, the high pressure dissolved mineral slurry is the mixture of sodium aluminate solution and red mud, must can carry out apportioned effort and obtain up-to-standard aluminium hydroxide product through solid-liquid separation to obtain more purified sodium aluminate solution; Underflow after the separation is that red mud will be through the superheated water incidental useful component of washing and recycling repeatedly.
Subsider is a kind of common equipment that is applied in the alumina producing solid-liquid separation technique.Its kind is more, by the structure branch individual layer and multitray settling tank is arranged; By the profile branch platybasic type, awl die bed and dark tapered subsider are arranged; Peripheral gear transmission, center worm and gear transmission, center hydrostatic transmission are arranged and do not have transmission subsider etc. by the type of drive branch.
Wherein do not have transmission deep-cone settling groove and be a kind of faster solid-liquid separating equipment of development recently, this kind subsider floor space is few, need not mechanical drive, saved facility investment.Since no transmission mechanism, non-power consumption during operation, and do not need to carry out maintenance of the equipment, reduced personnel's labour intensity, easily be automated.Simultaneously, because the structure of its dark awl, compressibility is strong, can obtain higher underflow and contain admittedly, satisfies and abandons the requirement that red mud is directly stacked.
" alumina producing " the 181st～184 page of report that press of Zhongnan Polytechnic Univ published in 1993: be applied to industrial red mud separating washing technology and mainly contain two kinds:
(1), once settlement separate, continuous more than four times the washing.The flow process of this technology is simple, and shortcoming is that the consumption of water is too big.
(2), flash liberation, 1～2 time the washing, filtering then flow process.The advantage of this technology be can obtain high contain admittedly abandon red mud, efflux red mud and the attached liquid amount is few, low in the pollution of the environment; Shortcoming is that flow process complexity, process energy consumption height, maintenance of the equipment and maintenance workload are big.
June in 2005 publication application number on the 8th CN1623902A, name is called " a kind of composite red mud depositing separating washing method and groove ".This application case comprise will dilution slip go out sodium aluminate solution and red mud through settlement separate, red mud carries out sedimentation washing with hot water, removes wherein appended alkali, is discharged into the red mud dam after up to standard to store up, the flat subsider of settlement separate employing, the hot wash groove adopts high rate settling.
Rinse bath all adopts high rate settling in the patent, though can save filtering red mud workshop section, saves construction cost, because once washing and secondary washing groove scab seriously, the trough cycle of operation is short, and cleaning work is difficulty especially.And the mechanical driving part of high rate settling, must carry out daily equipment routing inspection, maintenance, maintenance etc., also can cause equipment to jump sometimes because of various reasons and stop, flow process is interrupted.
Summary of the invention
The objective of the invention is deficiency at above-mentioned red mud separating, washing technology existence, providing a kind of can optimizing equipment dispose, simplify technical process, save facility investment and production run expense, alleviate personnel labor intensity, improve effect of settling, obtain qualified separation overflow and contain the higher red mud separating, washing and depositing process of abandoning red mud admittedly.
A kind of red mud separating, washing and depositing process, it is characterized in that its technical process is that the dissolved mineral slurry of header tank is compressed into certainly into the red mud separation tank, overflow behind separate and subside is that sodium aluminate solution is sent to decomposition, the sedimentation underflow be red mud after 3～6 backflushs reclaim incidental useful component, directly drain into Ba Qu and stack.
A kind of red mud separating, washing and depositing process of the present invention is characterized in that red mud separator tank and once washing, secondary washing groove adopt large-scale flat high side subsider, and No. 3～6 rinse baths of red mud adopt no transmission deep-cone settling groove.
A kind of red mud separating, washing and depositing process of the present invention, 200～6000mm is risen from the subsider groove in the groove basis that it is characterized in that header tank score at least.
A kind of red mud separating, washing and depositing process of the present invention is characterized in that the overflow of subsider and underflow carried by pump, and wherein the overflow of three washing deep-cone settling grooves relies on difference of altitude, directly enters in the entry mixers of the flat rinse bath of secondary.
A kind of red mud separating, washing and depositing process of the present invention is characterized in that the length-to-diameter ratio 1: 4～10 of large-scale flat high side subsider, and the length-to-diameter ratio of no transmission deep-cone settling groove is 1～5: 1.
A kind of red mud separating, washing and depositing process of the present invention is characterized in that the charging of each time laterite washing groove is provided with tubular static mixer or taper hydraulic mixer or the multi-form entry mixers of mixing screw.
The technological process of the inventive method, the groove basis score of the ore pulp header tank after the stripping is risen 200～6000mm from the subsider groove, dilution ore pulp in the header tank relies on difference of altitude from compressing into into the red mud separation tank, the overflow of ore pulp behind separate and subside is that sodium aluminate solution is sent to decomposition, the sedimentation underflow be red mud after 3-6 backflush reclaims incidental useful component, stack to Ba Qu by pump delivery.The overflow and the underflow of subsider are carried by pump, and wherein the overflow of three washing deep-cone settling grooves directly enters in the entry mixers of secondary washing flat pan.The charging of laterite washing groove is provided with tubular static mixer or taper hydraulic mixer or the multi-form entry mixers of mixing screw, with the thorough mixing of assurance red mud and washing lotion, and the mixed effect that improves red mud slurry and flocculation agent.
Method of the present invention has the following advantages:
1, because large-scale flat high side subsider settling area is big, enough liquid measure surge capabilities is arranged, be used for the red mud detached job and be convenient to organization of production; Once scab seriously, adopt large-scale high side subsider to be convenient to the removal treatment of trough with the secondary washing groove.No transmission deep-cone settling groove is applied to No. 3～6 times few rinse baths of the amount of scabbing, and has reduced running cost, avoids plant machinery accident and trough to scab again and clears up the problem of difficulty.Simultaneously, the flow process of the inventive method configuration can obtain qualified separation overflow and high contain admittedly abandon red mud.
2, to adopt 3～6 washings be to guarantee detersive efficiency, promptly reducing under the situation of red mud additional loss as far as possible in the present invention, simplifies Production Flow Chart, reduces working cost.
3, dissolved mineral slurry relies on the difference of altitude of header tank and separation tank, has realized that separation tank from compressing into material, has saved the separation tank fresh feed pump, has greatly reduced production cost.The groove basis score of ore pulp header tank can guarantee that from the high at least 200mm in subsider groove top ore pulp is fully from compressing into separation tank; If difference of altitude surpasses 6000mm, the fresh feed pump lift of ore pulp header tank increases more, and its overall economic efficiency is obvious inadequately.Equally, utilize the difference of altitude of three washings deep-cone settling groove and the flat rinse baths of secondary, saved three and washed overflow type pump, in the simplification technical process, reduced production cost.
4, the length-to-diameter ratio of large-scale flat high side subsider is 1: 4～10, has both guaranteed that subsider has enough surge capabilities, was convenient to the carrying out of removal treatment again; The length-to-diameter ratio of no transmission deep-cone settling groove is 1～5: 1, has made full use of the few advantage of dark awl groove floor space.
5, the charging of each time laterite washing groove is provided with tubular static mixer or taper hydraulic mixer or the multi-form entry mixers of mixing screw, guaranteed the thorough mixing of red mud and washing lotion, improve the mixed effect of red mud slurry and flocculation agent, can reduce the consumption of flocculation agent.
Description of drawings
Fig. 1 is the processing unit schematic flow sheet of the inventive method.
Embodiment
A kind of red mud separating, washing and depositing process, its technical process is that the dissolved mineral slurry of header tank is compressed into certainly into the red mud separation tank, overflow behind separate and subside is that sodium aluminate solution is sent to decomposition, the sedimentation underflow be red mud after 3～6 backflushs reclaim incidental useful component, directly drain into Ba Qu and stack.Red mud separator tank and once washing, secondary washing groove adopt large-scale flat high side subsider, and No. 3～6 rinse baths of red mud adopt no transmission deep-cone settling groove.200～6000mm is risen from the subsider groove in the groove basis of header tank score at least.The overflow and the underflow of subsider are carried by pump, and wherein the overflow of three washing deep-cone settling grooves relies on difference of altitude, directly enters in the entry mixers of the flat rinse bath of secondary.The length-to-diameter ratio of large-scale flat high side subsider 1: 4～10, the scene ratio of no transmission deep-cone settling groove is 1～5: 1.The charging of each time laterite washing groove is provided with tubular static mixer or taper hydraulic mixer or the multi-form entry mixers of mixing screw.
The present invention is further described below in conjunction with example and accompanying drawing.
Embodiment
Adopt flash liberation and four backflush technologies, (specification was the large-scale flat high side subsider of φ 36 * 8m) to the length-to-diameter ratio of separation tank, once washing and secondary washing subsider in 1: 4.5 in the flow process, three washings and four washing settling grooves, the no transmission deep-cone settling groove of 1: 1 specification φ of employing length-to-diameter ratio, 18 * 18m.In addition, once with the feed configuration taper hydraulic mixer of secondary washing subsider, the feed system of three times and four times washing settling grooves disposes static mixer.
The bottom land score of header tank 1 by the dilution ore pulp that header tank 1 comes out, is certainly compressed into separator tank 2 by difference of altitude from subsider 2 high 3000mm.Separate the qualified sodium aluminate solution in back and promptly separate overflow, send decomposition process through overflow type pump 11, underflow is red mud is delivered to once washing groove 3 through underflow pump 12 a charging hydraulic mixer 4; The once washing overflow is sent to the dilution dissolved mineral slurry through pump 13, and the once washing underflow is delivered to the charging hydraulic mixer 6 of secondary washing subsider 5 through pump 14; The secondary washing overflow enters in the charging hydraulic mixer 4 of once washing subsider 3 through pump 15, and the secondary settlement underflow is delivered to the charging tubular static mixer 8 of three washing settling grooves 7 through pump 16; The overhead height of the overflow port of No. three rinse baths 7 and secondary washing charging hydraulic mixer 6 differs 5.5m, three washing overflow gravity flows enter 6, three washings of secondary washing entry mixers underflow is delivered to four washing settling grooves 9 through pump 17 charging tubular static mixer 10; Four washing overflows are through the charging tubular static mixer of No. 18 to three rinse baths of pump, and the underflow that the height that is obtained by four washing settling grooves 9 contains is admittedly delivered to red mud through pump 19 and done the stockyard as abandoning red mud.
Claims (6)
1. red mud separating, washing and depositing process, it is characterized in that its technical process is that the dissolved mineral slurry of header tank is compressed into certainly into the red mud separation tank, overflow behind separate and subside is that sodium aluminate solution is sent to decomposition, the sedimentation underflow be red mud after 3～6 backflushs reclaim incidental useful component, directly drain into Ba Qu and stack.
2. according to the described a kind of red mud separating, washing and depositing process of claim, it is characterized in that red mud separator tank and once washing, secondary washing groove adopt large-scale flat high side subsider, No. 3～6 rinse baths of red mud adopt no transmission deep-cone settling groove.
3. according to the described a kind of red mud separating, washing and depositing process of claim, 200～6000mm is risen from the subsider groove in the groove basis that it is characterized in that header tank score at least.
4. according to the described a kind of red mud separating, washing and depositing process of claim, the overflow and the underflow that it is characterized in that subsider are carried by pump, wherein the overflow of three washing deep-cone settling grooves relies on difference of altitude, directly enters in the entry mixers of the flat rinse bath of secondary.
5. according to the described a kind of red mud separating, washing and depositing process of claim, it is characterized in that the length-to-diameter ratio 1: 4～10 of large-scale flat high side subsider, the length-to-diameter ratio of no transmission deep-cone settling groove is 1～5: 1.
6. according to the described a kind of red mud separating, washing and depositing process of claim, it is characterized in that the charging of each time laterite washing groove is provided with tubular static mixer or taper hydraulic mixer or the multi-form entry mixers of mixing screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610103783 CN1887713A (en) | 2006-08-01 | 2006-08-01 | Red mud separating, washing and depositing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610103783 CN1887713A (en) | 2006-08-01 | 2006-08-01 | Red mud separating, washing and depositing process |
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| Publication Number | Publication Date |
|---|---|
| CN1887713A true CN1887713A (en) | 2007-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610103783 Pending CN1887713A (en) | 2006-08-01 | 2006-08-01 | Red mud separating, washing and depositing process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101759214B (en) * | 2008-12-25 | 2011-12-21 | 中国铝业股份有限公司 | Method for filtering separation of sodium aluminate pulp |
| CN102441543A (en) * | 2011-08-30 | 2012-05-09 | 湘潭大学 | Method and device for fluidized washing of superfine particles |
| CN104528785A (en) * | 2014-12-11 | 2015-04-22 | 广西华银铝业有限公司 | Method for improving settling separation performance of bauxite slurry |
| CN104876251A (en) * | 2015-05-05 | 2015-09-02 | 刘永刚 | Process for rapidly separating sodium aluminate solution and washing red mud in aluminum oxide production |
| CN107902682A (en) * | 2017-12-29 | 2018-04-13 | 杨蕊鸿 | A kind of processing unit and its processing method of alumina producing exsolution red mud |
| CN112573551A (en) * | 2019-09-29 | 2021-03-30 | 沈阳铝镁设计研究院有限公司 | Method for reducing hydrolysis in red mud separation and washing process |
| CN113772698A (en) * | 2021-09-24 | 2021-12-10 | 广西华昇新材料有限公司 | Red mud settling separation method in process of producing alumina by adopting Guinea bauxite |
-
2006
- 2006-08-01 CN CN 200610103783 patent/CN1887713A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101759214B (en) * | 2008-12-25 | 2011-12-21 | 中国铝业股份有限公司 | Method for filtering separation of sodium aluminate pulp |
| CN102441543A (en) * | 2011-08-30 | 2012-05-09 | 湘潭大学 | Method and device for fluidized washing of superfine particles |
| CN104528785A (en) * | 2014-12-11 | 2015-04-22 | 广西华银铝业有限公司 | Method for improving settling separation performance of bauxite slurry |
| CN104876251A (en) * | 2015-05-05 | 2015-09-02 | 刘永刚 | Process for rapidly separating sodium aluminate solution and washing red mud in aluminum oxide production |
| CN107902682A (en) * | 2017-12-29 | 2018-04-13 | 杨蕊鸿 | A kind of processing unit and its processing method of alumina producing exsolution red mud |
| CN112573551A (en) * | 2019-09-29 | 2021-03-30 | 沈阳铝镁设计研究院有限公司 | Method for reducing hydrolysis in red mud separation and washing process |
| CN113772698A (en) * | 2021-09-24 | 2021-12-10 | 广西华昇新材料有限公司 | Red mud settling separation method in process of producing alumina by adopting Guinea bauxite |
| CN113772698B (en) * | 2021-09-24 | 2023-08-11 | 广西华昇新材料有限公司 | Red mud sedimentation separation method in process of producing alumina by using guinea bauxite |
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