CN102120595B - Red mud separating and washing method - Google Patents
Red mud separating and washing method Download PDFInfo
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- CN102120595B CN102120595B CN2010103000787A CN201010300078A CN102120595B CN 102120595 B CN102120595 B CN 102120595B CN 2010103000787 A CN2010103000787 A CN 2010103000787A CN 201010300078 A CN201010300078 A CN 201010300078A CN 102120595 B CN102120595 B CN 102120595B
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Abstract
The invention discloses a red mud separating and washing method. Red mud diluted slurry which is dissolved out is introduced into a vacuum filter for separation, filtrate is introduced into the next procedure, and filter cakes are filtered and washed through four passes of vacuum filters; moreover, washing liquor is reversely conveyed to the previous level of vacuum filter in the process of filtering and separating; therefore, the vacuum filters replace the conventional high-efficiency deep cone settling tank or a large flat-bottomed settling tank, the equipment occupied area can be saved, and a flocculent is not used and a flocculent preparation system is eliminated so as to reduce unit production cost and unit investment cost of alumina. Meanwhile, according to experiment detection, the vacuum filtration technology for separating and washing the red mud (once separation and four-time reverse washing) can make the solid content of the filter cakes before washing reach 52-54 percent.
Description
Technical field
The present invention relates to a kind of red mud separation and abstersion method, belong to technical field of aluminum electrolysis.
Background technology
In aluminum oxide production process, need to carry out separation and abstersion to the exsolution red mud after stripping, separating thick liquid becomes seminal fluid after controlled filter, separating underflow through the washing after outside drain into red mud dump.General efficient deep-cone settling groove or the large-scale flat subsider of adopting of the separation of existing exsolution red mud; Laterite washing is general adopts efficient deep-cone settling groove to carry out separating, washing through 4～5 counter flow washings or 3 counter flow washing+1 of large-scale flat subsider No. time rotary drum washing and filtering.Existing separating, washing mode all must be added a certain amount of flocculation agent, and configuration flocculation agent preparation system, so must cause the increase of the aluminum oxide unit cost of production and cost of investment.Simultaneously the diameter of existing efficient deep-cone settling groove or large-scale flat subsider is all excessive, causes the production floor space excessive, and the underflow that obtains contains not highly admittedly, separates, washing effect is not satisfactory.
Summary of the invention
The technical problem to be solved in the present invention is, do not re-use flocculation agent when a kind of separation and washing red mud solution are provided, and separation, red mud separation and abstersion method that washing effect is good, can overcome the deficiencies in the prior art.
Technical scheme of the present invention; It is that a, the red mud dilution slip that stripping is next are sent into vacuum filter and separated, and isolates separating filtrate and separates filter cake, and separating filtrate is sent into the controlled filter operation; Be transported to vacuum filter No. one time after secondary cleaning water after b, separation filter cake and secondary vacuum filter filter mixes, isolate primary wash liquor and a filter wash cake, primary wash liquor send solution thinning groove; Be transported to the secondary vacuum filter after three washing lotions after c, a filter wash cake and No. three vacuum filters filtrations are mixed, isolate secondary cleaning water and two filter wash cakes; Be transported to vacuum filter No. three times after four washing lotions after d, two filter wash cakes and No. four vacuum filters filter are mixed, isolate three washing lotions and three filter wash cakes; E, three filter wash cakes and be transported to vacuum filter No. four times after hot water mixes, isolate four washing lotions and four filter cakes, and four times filter cake is transported to red mud dump.
Separating filtrate, primary wash liquor, secondary cleaning water, three washing lotions and four washing lotions first enter respectively thick liquid bath, primary wash liquor groove, secondary cleaning water groove, three washing lotion grooves and four washing lotion grooves, then by pump delivery, arrive specified location.
Separate the mixed slurry of mixed slurry, three filter wash cakes and hot water of mixed slurry, two filter wash cakes and four washing lotions of mixed slurry, a filter wash cake and three washing lotions of filter cake and secondary cleaning water and four filter wash cakes and first enter respectively separating underflow groove, and wash underflow groove, two and wash underflow groove, three and wash underflow groove and four and wash the underflow groove, then by pump delivery, arrive specified location.
Separate the mode discharging that filter cake, a filter wash cake and two filter wash cakes rinse by back-blowing and washing lotion; Three filter wash cakes are by back-blowing and hot water injection's mode discharging; Four filter cakes pass through the mode discharging of back-blowing.
The hot water temperature who mixes with three filter cakes is 65～70 ℃.
Compared with the prior art, the red mud dilution slip that the present invention carrys out stripping is sent into vacuum filter and is separated, filtrate is sent into next procedure, and filter cake carries out filtration washing by four road vacuum filters again, and when filtration washing, washing lotion oppositely is transported to higher level's vacuum filter; Replace existing efficient deep-cone settling groove or large-scale flat subsider with vacuum filter like this, not only can save occupation area of equipment, and can stop using flocculation agent and cancel the flocculation agent preparation system, to reduce the unit cost of production and the specific investment cost of aluminum oxide.And detect according to test, adopt the vacuum filtration technology to realize that red mud separation and abstersion (flash liberation, four counter flow washings) can make filter cake wash and frontly admittedly contain and reach 52～54%.Separating filtrate and washing lotion enter respectively thick liquid bath and washing lotion groove, then by pump delivery, arrive specified location, can make like this separating filtrate and washing lotion concentration even, and be convenient to pump delivery.The mixed solution of filter cake and washing lotion is introduced into the underflow groove, then by pump delivery, arrives specified location, mixed solution (filter cake and washing lotion) is mixed more even, and be convenient to pump delivery.The present invention simultaneously also has the advantages such as technique is simple, easy to operate, easy popularization.
Description of drawings
Fig. 1 is schema of the present invention.
Embodiment
Embodiment 1: shown in Figure 1, the dilution slip that stripping comes enters separate vacuum filter 1 to be separated, (separating filtrate contains admittedly≤200mg/l) advances that thick liquid bath 2 is rear with crude liquor pump 3, send next process to separating filtrate, separate the discharge way that filter cake adopts back-blowing and secondary cleaning water to rinse and send into separating underflow groove 4, separate before filter cake rinses and admittedly contain approximately 40～42%.Mixed slurry in separating underflow groove 4 is sent into one with separating underflow pump 5 and is washed vacuum filter 6 and wash for the first time; One washes primary wash liquor (filtrate) that vacuum filter 6 produces advances that primary wash liquor groove 7 is rear send solution thinning groove with primary wash liquor pump 8.The discharge way that one filter wash cake adopts back-blowing and three washing lotions to rinse is sent into one and is washed before underflow groove 9, one filter wash cakes rinse and admittedly contain approximately 43～45%.One washes mixed slurry in underflow groove 9 washes underflow pump 10 with one and sends into two and wash vacuum filter 11 and wash for the second time; Two wash secondary cleaning waters that vacuum filter 11 produces advances that secondary cleaning water groove 12 is rear send separate vacuum filter 1 for flush cake with secondary cleaning water pump 13; The discharge way that the two filter wash cakes that two wash vacuum filter after filtering adopt back-blowings and four washing lotions to rinse is sent into two and is washed before underflow groove 14, two filter wash cakes rinse and admittedly contain approximately 46～48%.Washing mixed slurry in underflow groove 14 with two washes underflow pump 15 with two and sends into three and wash vacuum filter 16 and wash for the third time; 3 three washing lotions of washing vacuum filter 16 generations are advanced three lotion pumps 18 of three the rear use of washing lotion groove 17 and are sent one to wash vacuum filter 6 for flush cake; The three filter wash cakes that three wash vacuum filter after filtering adopt back-blowings and hot water injection's discharge way to send into three and wash before underflow groove 19, three filter wash cakes rinse and admittedly contain approximately 49～51%.Washing mixed slurry in underflow groove 19 with three washes underflow pump 20 with three and sends into four and wash vacuum filter 21 and carry out the 4th time and wash; 4 four washing lotions of washing vacuum filter 21 generations are advanced four lotion pumps 23 of four the rear use of washing lotion groove 22 and are sent two to wash vacuum filter 11 for flush cake, four filter wash cakes adopt the discharge way of back-blowing to enter four and wash underflow groove 24, four wash four filter wash cakes in underflow groove 24 washes underflow pump 25 with four and send red mud dump, and four filter wash cakes contain approximately 52～54% admittedly.
Claims (1)
1. red mud separation and abstersion method, it is characterized in that: it is
A, the dilution slip that stripping is next are sent into vacuum filter and are separated, and isolate separating filtrate and separate filter cake, and separating filtrate is sent into the controlled filter operation;
Be transported to vacuum filter No. one time after secondary cleaning water after b, separation filter cake and secondary vacuum filter filter mixes, isolate primary wash liquor and a filter wash cake, primary wash liquor send solution thinning groove;
Be transported to the secondary vacuum filter after three washing lotions after c, a filter wash cake and No. three vacuum filters filtrations are mixed, isolate secondary cleaning water and two filter wash cakes;
Be transported to vacuum filter No. three times after four washing lotions after d, two filter wash cakes and No. four vacuum filters filter are mixed, isolate three washing lotions and three filter wash cakes;
E, three filter wash cakes and be transported to vacuum filter No. four times after hot water mixes, isolate four washing lotions and four filter cakes, and four times filter cake is transported to red mud dump;
Separating filtrate, primary wash liquor, secondary cleaning water, three washing lotions and four washing lotions first enter respectively thick liquid bath, primary wash liquor groove, secondary cleaning water groove, three washing lotion grooves and four washing lotion grooves, then by pump delivery, arrive specified location; Separate the mixed slurry of mixed slurry, three filter wash cakes and hot water of mixed slurry, two filter wash cakes and four washing lotions of mixed slurry, a filter wash cake and three washing lotions of filter cake and secondary cleaning water and four filter wash cakes and first enter respectively separating underflow groove, and wash underflow groove, two and wash underflow groove, three and wash underflow groove and four and wash the underflow groove, then by pump delivery, arrive specified location; Separate the mode discharging that filter cake, a filter wash cake and two filter wash cakes rinse by back-blowing and washing lotion; Three filter wash cakes are by back-blowing and hot water injection's mode discharging; Four filter cakes pass through the mode discharging of back-blowing; The hot water temperature who mixes with three filter cakes is 65～70 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010103000787A CN102120595B (en) | 2010-01-07 | 2010-01-07 | Red mud separating and washing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010103000787A CN102120595B (en) | 2010-01-07 | 2010-01-07 | Red mud separating and washing method |
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| Publication Number | Publication Date |
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| CN102120595A CN102120595A (en) | 2011-07-13 |
| CN102120595B true CN102120595B (en) | 2013-11-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2645430A1 (en) * | 2012-03-28 | 2013-10-02 | Soitec | Manufacture of multijunction solar cell devices |
| CN103848449B (en) * | 2012-11-28 | 2015-04-29 | 沈阳铝镁设计研究院有限公司 | Red mud separation and washing tank inverting method and its apparatus |
| CN104058433B (en) * | 2014-06-19 | 2015-07-08 | 杭州化工机械有限公司 | Process for fast sodium aluminate solution separation and red mud washing |
| CN109439023A (en) * | 2018-11-07 | 2019-03-08 | 张勇 | A technique for functional filler production is carried out using red mud |
| CN109761208B (en) * | 2019-03-06 | 2020-07-07 | 深圳海纳百川科技有限公司 | Iron phosphate washing process and device |
| CN115445311B (en) * | 2022-09-29 | 2024-02-06 | 罗斯（无锡）设备有限公司 | Continuous washing and filtering method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876569A (en) * | 2006-06-19 | 2006-12-13 | 娄进 | Production method for alumina |
| CN2848338Y (en) * | 2005-12-19 | 2006-12-20 | 贵阳铝镁设计研究院 | Red mud cleaning device |
| CN101125671A (en) * | 2007-07-12 | 2008-02-20 | 中国铝业股份有限公司 | Method for separating red mud during aluminum oxide producing process |
| CN201240981Y (en) * | 2008-07-16 | 2009-05-20 | 核工业烟台同兴实业有限公司 | Horizontal rubber belt type vacuum filter |
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2010
- 2010-01-07 CN CN2010103000787A patent/CN102120595B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2848338Y (en) * | 2005-12-19 | 2006-12-20 | 贵阳铝镁设计研究院 | Red mud cleaning device |
| CN1876569A (en) * | 2006-06-19 | 2006-12-13 | 娄进 | Production method for alumina |
| CN101125671A (en) * | 2007-07-12 | 2008-02-20 | 中国铝业股份有限公司 | Method for separating red mud during aluminum oxide producing process |
| CN201240981Y (en) * | 2008-07-16 | 2009-05-20 | 核工业烟台同兴实业有限公司 | Horizontal rubber belt type vacuum filter |
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| Title |
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| 俞章法.盘式过滤机在赤泥分离上的应用研究.《矿山机械》.2009,第37卷(第9期),92-95. |
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| CN102120595A (en) | 2011-07-13 |
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