CN101602526B - Equipment and method for processing red mud in alumina factory - Google Patents
Equipment and method for processing red mud in alumina factory Download PDFInfo
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- CN101602526B CN101602526B CN2008103020938A CN200810302093A CN101602526B CN 101602526 B CN101602526 B CN 101602526B CN 2008103020938 A CN2008103020938 A CN 2008103020938A CN 200810302093 A CN200810302093 A CN 200810302093A CN 101602526 B CN101602526 B CN 101602526B
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Abstract
The invention discloses equipment and a method for processing the red mud in an alumina factory. The method for processing the red mud in the alumina factory comprises the following steps: the red mud precipitated in a red mud precipitating tank is mixed with hot water in a mixing tank; the mixture is pumped to a feeding tank of a plate-frame filter press which is arranged in a red mud stack field by a centrifugal pump; the mixture is fed to the plate-frame filter press so as to be filtered and dehydrated by a feeding pump until the content of water in the mixture is reduced below 30%; obtained filtrate is returned to the red mud precipitating tank to wash the red mud; the obtained red mud is delivered to the red mud stack field by an automobile or a belt; and the red mud is turned over by a bulldozer to be dried and stacked. The invention solves the problems that the red mud in the prior art is turned over to be dried in a large drying area by taking a long time and high land expenses because the red mud contains more water and can not be directly turned over by the bulldozer to be dried, and the invention saves more time and expenses.
Description
Technical field
The present invention relates to the method that red mud is handled in a kind of alumina producing, also relate to the used equipment of red mud processing in a kind of alumina producing simultaneously.
Background technology
In the production engineering of aluminium oxide, the slip after the stripping will be clarified through red mud setting tank after dilution, and red mud and sodium aluminate solution are separated.The sodium aluminate solution that overflows obtains alumina product through follow-up workshop section, and the red mud that underflow comes out then has two kinds of processing methods: a kind of is to adopt red mud setting tank to carry out back flush with hot water; Another kind is to adopt subsider to add the red mud vacuum-type drum filter to carry out back flush with hot water, reduces alkali content wherein, reaches directly to be discharged into the red mud dam behind the environmental protection standard and to store up.
But no matter adopt any in above two kinds of methods; All have same problem: the moisture content that promptly is sent to the red mud that red mud dump stores up is all higher, in general adopts red mud moisture content >=48% of bulk deposition trough washery, adopts subsider to add red mud moisture content >=37% of filter mode; And under moisture content >=30% situation of red mud; Can not directly adopt bull-dozer to ted, can only rely on the natural evaporation of moisture content in the red mud to carry out drying, not only needed to store up the area that teds bigger; Cost of land is high, and drying time is longer.
Summary of the invention
Technical problem to be solved by this invention is, the method and apparatus that provides a kind of red mud for alumina plant to handle.Through this method and apparatus, can the moisture content of red mud be reduced to below 30%, store up thereby can directly adopt bull-dozer to ted, reduce the time of red mud drying, and practice thrift the area of red mud dump, the expense of practicing thrift the soil.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is following: the method that red mud for alumina plant is handled.The underflow that it comes out red mud setting tank is sent to earlier in the plate and frame type filter-press, behind the further filter-press dehydration of plate and frame type filter-press, the moisture content of red mud is reduced to moisture content≤30%; The filtrating that obtains after the press filtration is sent red mud setting tank back to as slurry through circulating pump, and the filter cake that obtains is transported to red mud dump with automobile or belt, teds with bull-dozer and stores up.
In the method that above-mentioned red mud for alumina plant is handled, be that the underflow that is come out by red mud setting tank is mixed in mixing channel with the hot water of washing usefulness is first, then with centrifugal pumping to trough, be sent to feeding pump again and carry out press filtration in the plate and frame type filter-press.
In the method that aforesaid red mud for alumina plant is handled, be convenient transportation, the present invention is set directly at plate and frame type filter-press and trough in the red mud dump, can adopt the belt transportation like this, saves cost of transportation.
The equipment that red mud for alumina plant is handled.Comprise red mud setting tank, after red mud setting tank, be provided with mixing channel, trough and plate and frame type filter-press, between mixing channel and trough, centrifugal pump is housed, between trough and plate and frame type filter-press, feeding pump is housed; Red mud setting tank, mixing channel, centrifugal pump, trough, feeding pump, plate and frame type filter-press connect through pipeline each other.
Compared with prior art, the present invention utilize plate and frame type filter-press can the moisture content of filter material be fallen very low characteristics, mix in mixing channel through underflow that red mud setting tank is come out hot water with washing usefulness; Use the trough of centrifugal pumping toward the plate and frame type filter-press of red mud dump then, send into plate and frame type filter-press through feeding pump and carry out filter press, the filtrating that obtains after the press filtration is sent red mud setting tank back to as slurry through circulating pump; The filter cake that obtains is that moisture content has dropped to the red mud below 30%; Transport to the stockyard with automobile or belt, since lower through the moisture content of the red mud after this method processing, can directly adopt bull-dozer to ted and store up; It is needed that to ted area less; Significantly reduce the time of red mud drying, practiced thrift the area of a large amount of red mud dumps, thereby practiced thrift the expense in soil greatly; Effectively solved in the prior art higher because of the red mud moisture content; Can not directly adopt bull-dozer to ted, cause tedding time length, need ted problems such as area is big, cost of land height, obtain saving greatly aspect time and the expense.
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention.
The specific embodiment
Embodiments of the invention: shown in accompanying drawing 1, mixing channel 2, trough 3 and plate and frame type filter-press 4 are set after red mud setting tank 1.For convenient transportation, practice thrift cost of transportation, plate and frame type filter-press 4 and trough 3 all are arranged in the red mud dump 7.And centrifugal pump 5 is installed between mixing channel 2 and trough 3; Feeding pump 6 is installed between trough 3 and plate and frame type filter-press 4, red mud setting tank 1, mixing channel 2, centrifugal pump 5, trough 3, feeding pump 6, plate and frame type filter-press 4 are connected with pipeline each other.During processing; Red mud setting tank 1 underflow that comes out and the hot water that washs usefulness are mixed in mixing channel 2 earlier; Deliver to trough 3 with centrifugal pump 5 then; Be sent to feeding pump 6 again and carry out press filtration in the plate and frame type filter-press 4, behind plate and frame type filter-press 4 further filter-press dehydrations, the moisture content of red mud is reduced to moisture content≤30%; The filtrating that obtains after the press filtration is sent red mud setting tank 1 back to as slurry through circulating pump, and the filter cake that obtains is transported to red mud dump 7 with belt 8, teds with bull-dozer and stores up.
Claims (2)
1. the method handled of a red mud for alumina plant; It is characterized in that: the underflow that red mud setting tank (1) is come out mixes in mixing channel (2) with the hot water of washing usefulness; Use centrifugal pump (5) to deliver to trough (3) then; Use feeding pump (6) to be sent in the plate and frame type filter-press (4) again and carry out press filtration, plate and frame type filter-press (4) and trough (3) are arranged in the red mud dump (7); Through plate and frame type filter-press (4) further behind the filter-press dehydration, the moisture content of red mud is reduced to moisture content≤30%; The filtrating that obtains after the press filtration is sent red mud setting tank (1) back to as slurry through circulating pump, and the filter cake that obtains is transported to red mud dump (7) with automobile or belt, teds with bull-dozer and stores up.
2. the equipment handled of a red mud for alumina plant; Comprise red mud setting tank (1); It is characterized in that: be provided with mixing channel (2), trough (3) and plate and frame type filter-press (4) afterwards at red mud setting tank (1); Between mixing channel (2) and trough (3), centrifugal pump (5) is housed, between trough (3) and plate and frame type filter-press (4), feeding pump (6) is housed; Red mud setting tank (1), mixing channel (2), centrifugal pump (5), trough (3), feeding pump (6), plate and frame type filter-press (4) connect through pipeline each other; Plate and frame type filter-press (4) and trough (3) are arranged in the red mud dump (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008103020938A CN101602526B (en) | 2008-06-11 | 2008-06-11 | Equipment and method for processing red mud in alumina factory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008103020938A CN101602526B (en) | 2008-06-11 | 2008-06-11 | Equipment and method for processing red mud in alumina factory |
Publications (2)
| Publication Number | Publication Date |
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| CN101602526A CN101602526A (en) | 2009-12-16 |
| CN101602526B true CN101602526B (en) | 2012-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008103020938A Active CN101602526B (en) | 2008-06-11 | 2008-06-11 | Equipment and method for processing red mud in alumina factory |
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| CN (1) | CN101602526B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372408A (en) * | 2010-08-26 | 2012-03-14 | 沈阳铝镁设计研究院有限公司 | Method for dehydrating Bayer-process red mud generated during dry-method feeding and sintering of aluminum oxides produced by using series process |
| CN102556682A (en) * | 2010-12-07 | 2012-07-11 | 中铝国际技术发展有限公司 | Allocation method for bauxite homogenizing stock dump |
| CN103483880B (en) * | 2013-10-09 | 2015-04-01 | 山东星之光环保科技工程有限公司 | Production method of red mud filler |
| CN105417189A (en) * | 2015-12-21 | 2016-03-23 | 东北大学设计研究院（有限公司） | Fixed belt conveying and transporting system and method for filter pressing of red mud |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1150578A (en) * | 1995-11-23 | 1997-05-28 | 山东铝业公司 | Process for recovering alkali by red mud waste liquid film method |
| CN1724377A (en) * | 2005-07-07 | 2006-01-25 | 贵阳铝镁设计研究院 | Tech. for filtering and transporting of red mud |
| CN1730416A (en) * | 2005-07-18 | 2006-02-08 | 贵阳铝镁设计研究院 | Technique for conveying and filtering red mud |
-
2008
- 2008-06-11 CN CN2008103020938A patent/CN101602526B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1150578A (en) * | 1995-11-23 | 1997-05-28 | 山东铝业公司 | Process for recovering alkali by red mud waste liquid film method |
| CN1724377A (en) * | 2005-07-07 | 2006-01-25 | 贵阳铝镁设计研究院 | Tech. for filtering and transporting of red mud |
| CN1730416A (en) * | 2005-07-18 | 2006-02-08 | 贵阳铝镁设计研究院 | Technique for conveying and filtering red mud |
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| CN101602526A (en) | 2009-12-16 |
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Owner name: GUIYANG ALUMINUM AND MAGNESIUM DESIGN INSTITUTE CO Free format text: FORMER OWNER: GUIYANG ALUMINIUM AND MAGNESIUM DESIGN INST. Effective date: 20110722 |
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Free format text: CORRECT: ADDRESS; FROM: 550004 NO. 208, BEIJING ROAD, GUIYANG CITY, GUIZHOU PROVINCE TO: 550081 NO.2, JINZHU ROAD, JINYANG NEW DISTRICT, GUIYANG CITY, GUIZHOU PROVINCE |
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Effective date of registration: 20110722 Address after: 550081 Guiyang Province, Jinyang New District, Zhu Zhu Road, No. 2 Applicant after: Guiyang Aluminum & Magnesium Design Institute Co., Ltd. Address before: 550004 No. 208, Beijing Road, Guiyang, Guizhou Applicant before: Guiyang Aluminium and Magnesium Design Inst. |
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