CN103408048B - Filtration-integration integrated plant and method for producing aluminum oxide by Bayer process - Google Patents
Filtration-integration integrated plant and method for producing aluminum oxide by Bayer process Download PDFInfo
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- CN103408048B CN103408048B CN201310382435.2A CN201310382435A CN103408048B CN 103408048 B CN103408048 B CN 103408048B CN 201310382435 A CN201310382435 A CN 201310382435A CN 103408048 B CN103408048 B CN 103408048B
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Abstract
The invention belongs to the field of mineral processing, and particularly relates to a filtration-integration integrated device and method for producing aluminum oxide by a Bayer process. In the device, a crude liquid tank is connected with a leaf filter through a crude liquid pump, the bottom of the leaf filter is connected with a filter cake tank, and the upper part is connected with a fine liquid tank; the bottom of the fine liquid tank is provided with a fine liquid pump; the fine liquid pump is connected with a vertical disk filter; the filter cake tank is arranged on a 5.000 plane; the lower part of the filter cake tank is provided with a filter cake pump; an aluminum hydroxide slurry tank is arranged above a horizontal disk filter; and the horizontal disk filter is connected with a belt conveyor. The device for aluminum oxide filtration provided by the invention implements filtration-integration integration. The invention reduces the crystal seed tank, mixing unit and other units in the existing device, reduces the corresponding pipelines, valves, pipe fittings and the like, reduces the equipment maintenance and maintenance work load in the device operation process, saves the energy, and lowers the production and labor cost.
Description
Technical field
The invention belongs to mineral manufacture field, be specifically related to a kind of integrated device and method of filtration of alumina producing Bayer process.
Background technology
At present, in the technical process of alumina producing Bayer process, it is very crucial step that controlled filter, seminal fluid heat exchange, seed filtration and finished product filter, and the equipment related to comprises thick liquid bath, crude liquor pump, leaf filter, seminal fluid groove, seminal fluid pump, vertical-disk filter, seed mixer, crystal seed pump, aluminum hydroxide slurry groove, aluminum hydroxide slurry pump, horizontal-shaft disk filter, filter cake groove, filter cake pump, taper mother liquor tank, mother liquor tank and mother liquor pump.
The bauxite ore pulp of stripping and red mud wash liquor carry out settlement separate after diluting, obtain crude sodium aluminate solution, be called for short thick liquid, thick liquid sends into leaf filter through crude liquor pump in thick liquid bath, and obtain seminal fluid after leaf filter, seminal fluid is pumped into the seed chute of vertical-disk filter in seminal fluid groove through seminal fluid, enter seed mixer again to mix with crystal seed, decompose to decomposing in first groove through crystal seed pump delivery, bottom exploded flows to the aluminum hydroxide slurry groove filtered into finished product, is pumped to horizontal-shaft disk filter through aluminum hydroxide slurry; Decomposition overflow enters the mother liquor that vertical-disk filter obtains, and is pumped to seminal fluid heat exchange and seminal fluid heat exchange through taper mother liquor tank, mother liquor tank, mother liquor; The filter cake obtained after the filter of leaf filter leaf enters the filter cake groove being arranged on ▽ ± 0.000 plane, is pumped to laterite washing separating step through filter cake.
The equipment that each above processing step relates to, be distributed in controlled filter workshop, seminal fluid heat exchange workshop, seed filtration plant and finished product filtration plant, floor space is large, energy consumption is high, production cost is high, technical process is long, the problem that construction investment is large, labor cost is high and labour productivity is low.
Summary of the invention
For prior art Problems existing, the invention provides a kind of integrated device and method of filtration of alumina producing Bayer process, object be to provide a kind ofly to configure rationally, save energy, minimizing investment integrated gasifying device.
For achieving the above object, major equipment of the present invention comprises thick liquid bath, crude liquor pump, leaf filter, filter cake groove, filter cake pump, seminal fluid groove, seminal fluid pump, vertical-disk filter, aluminum hydroxide slurry groove, horizontal-shaft disk filter and rubber conveyer, wherein said thick liquid bath is connected by crude liquor pump with leaf filter, the bottom of leaf filter is connected with filter cake groove, top is connected with seminal fluid groove, the bottom of seminal fluid groove is provided with seminal fluid pump, and seminal fluid pump is connected with vertical-disk filter; Described filter cake groove is arranged on ▽ 5.000 plane, and the bottom of filter cake groove is provided with filter cake pump; Described aluminum hydroxide slurry groove is arranged on above horizontal-shaft disk filter, and horizontal-shaft disk filter is connected with rubber conveyer.
The thick liquid that red mud separating, washing obtains sends into leaf filter through crude liquor pump in thick liquid bath, seminal fluid is obtained after leaf filter, seminal fluid is pumped into vertical-disk filter through seminal fluid in seminal fluid groove, directly together with aluminium hydroxide crystal seed and crystal seed attached liquid, chute through vertical-disk filter is delivered to decompose in first groove and is decomposed, from decomposing the aluminum hydroxide slurry of underflow from flowing to aluminum hydroxide slurry groove, from flowing to horizontal-shaft disk filter after buffering; The aluminum hydroxide slurry carrying out self-decomposition overflow enters mother liquor that vertical-disk filter obtains from flowing to evaporator tank tank field, and leaf filter leaf filters the filter cake groove that the filter cake obtained enters ▽ 5.000 plane, is pumped to laterite washing separating step through filter cake.
Wherein said crude liquor pump, filter cake pump and seminal fluid pump are all with commercial conventional pump, are distinguished here with purposes difference to it.
Compared with prior art, feature of the present invention and beneficial effect are:
(1) The present invention reduces the equipment such as seed mixer and whipping device, crystal seed pump, overflow groove and whipping device thereof, overflow type pump, taper mother liquor tank, mother liquor tank and whipping device, mother liquor pump, aluminum hydroxide slurry pump in existing apparatus, reduce aluminum hydroxide slurry recess gauge lattice, and reduce filter cake pump lift, and reduce corresponding pipeline, valve, pipe fitting, pipe support.
Which reduce the maintenance of equipment in plant running process and maintenance workload.Such as, in original device, the every monthly repair of crystal seed pipeline once, scabs serious, and maintenance trouble, without crystal seed pipe in present device, seminal fluid and aluminium hydroxide crystal seed are directly through entering decomposer through chute.
(2) integrated gasifying device of the present invention is adopted to save the floor space of equipment, to produce 1000kt/y aluminum oxide per year: 5128m
2, be only 60% of former floor space, optimize configuration; Reduce constructive investment, to produce 1000kt/y aluminum oxide per year, constructive investment is 952.802 ten thousand yuan; Energy efficient, to produce 1000kt/y aluminum oxide per year, whole year operation 8760h, 10 years lives, energy consumption is 5886.9 ten thousand kilowatt-hours; Reduce operation cost, to produce 1000kt/y aluminum oxide per year, whole year operation 8760h, 10 years lives, operation cost is 3237.8 ten thousand yuan.
(3) construction period of device shortens about one month; Save labour requirement, to produce 1000kt/y aluminum oxide per year, labour requirement is 57 people, is only original labour requirement's 46%.
(4) adopt integrated gasifying device of the present invention to carry out alumina producing Bayer process filtration, simplify processing step and flow process.
Accompanying drawing explanation
Fig. 1 is the integrated gasifying device schematic diagram of filtration of alumina producing Bayer process of the present invention;
Wherein, 1: thick liquid bath; 2: crude liquor pump; 3: leaf filter; 4: filter cake groove; 5: filter cake pump; 6: seminal fluid groove; 7: seminal fluid pump; 8: vertical-disk filter; 9: aluminum hydroxide slurry groove; 10: horizontal-shaft disk filter; 11: rubber conveyer;
A: the thick liquid that red mud separating, washing obtains; B: decompose first groove; C: from the aluminum hydroxide slurry decomposing underflow; D: the aluminum hydroxide slurry carrying out self-decomposition overflow; E: evaporator tank tank field; F: laterite washing separating step.
Embodiment
As shown in Figure of description, major equipment of the present invention comprises thick liquid bath 1, crude liquor pump 2, leaf filter 3, filter cake groove 4, filter cake pump 5, seminal fluid groove 6, seminal fluid pump 7, vertical-disk filter 8, aluminum hydroxide slurry groove 9, horizontal-shaft disk filter 10 and rubber conveyer 11.
Wherein said thick liquid bath 1 is connected by crude liquor pump 2 with leaf filter 3, and the bottom of leaf filter 3 is connected with filter cake groove 4, and top is connected with seminal fluid groove 6, and the bottom of seminal fluid groove 6 is provided with seminal fluid pump 7, and seminal fluid pump 7 is connected with vertical disk filter 8; Described filter cake groove 6 is arranged on ▽ 5.000 plane, and the bottom of filter cake groove 4 is provided with filter cake pump 5; Described aluminum hydroxide slurry groove 9 is arranged on above horizontal-shaft disk filter 10, and horizontal-shaft disk filter 10 is connected with rubber conveyer 11.
The thick liquid A that red mud separating, washing obtains sends into leaf filter 3 through crude liquor pump 2 in thick liquid bath 1, seminal fluid is obtained after leaf filter, seminal fluid sends into vertical-disk filter 8 through seminal fluid pump 7 in seminal fluid groove 6, directly together with aluminium hydroxide crystal seed and crystal seed attached liquid, chute through vertical-disk filter 8 is delivered to decompose in first groove B and is decomposed, from decomposing the aluminum hydroxide slurry C of underflow from flowing to aluminum hydroxide slurry groove 9, from flowing to horizontal-shaft disk filter 10 after buffering; The aluminum hydroxide slurry D carrying out self-decomposition overflow enters mother liquor that vertical-disk filter 8 obtains from flowing to evaporator tank tank field E, and leaf filter 3 leaf filters the filter cake groove 4 that the filter cake obtained enters ▽ 5.000 plane, delivers to laterite washing separating step F through filter cake pump 5.
Claims (2)
1. the integrated gasifying device of the filtration of alumina producing Bayer process, comprises thick liquid bath, crude liquor pump, leaf filter, filter cake groove, filter cake pump, seminal fluid groove, seminal fluid pump, vertical-disk filter, aluminum hydroxide slurry groove, horizontal-shaft disk filter and rubber conveyer; Wherein said thick liquid bath is connected by crude liquor pump with leaf filter, and the bottom of leaf filter is connected with filter cake groove, and top is connected with seminal fluid groove, and the bottom of seminal fluid groove is provided with seminal fluid pump, it is characterized in that seminal fluid pump is connected with vertical-disk filter; Described filter cake groove is arranged on ▽ 5.000 plane, and the bottom of filter cake groove is provided with filter cake pump; Described aluminum hydroxide slurry groove is arranged on above horizontal-shaft disk filter, and horizontal-shaft disk filter is connected with rubber conveyer.
2. adopt the integrated gasifying device of filtration of alumina producing Bayer process according to claim 1 to carry out the method for filtering, it is characterized in that carrying out according to following steps:
The thick liquid that red mud separating, washing obtains sends into leaf filter through crude liquor pump in thick liquid bath, seminal fluid is obtained after leaf filter, seminal fluid is pumped into vertical-disk filter through seminal fluid in seminal fluid groove, directly together with aluminium hydroxide crystal seed and crystal seed attached liquid, chute through vertical-disk filter is delivered to decompose in first groove and is decomposed, from decomposing the aluminum hydroxide slurry of underflow from flowing to aluminum hydroxide slurry groove, from flowing to horizontal-shaft disk filter after buffering; The aluminum hydroxide slurry carrying out self-decomposition overflow enters mother liquor that vertical-disk filter obtains from flowing to evaporator tank tank field, and leaf filter leaf filters the filter cake groove that the filter cake obtained enters ▽ 5.000 plane, is pumped to laterite washing separating step through filter cake.
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| CN201310382435.2A CN103408048B (en) | 2013-08-29 | 2013-08-29 | Filtration-integration integrated plant and method for producing aluminum oxide by Bayer process |
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| CN201310382435.2A CN103408048B (en) | 2013-08-29 | 2013-08-29 | Filtration-integration integrated plant and method for producing aluminum oxide by Bayer process |
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| CN103408048B true CN103408048B (en) | 2015-02-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109592700A (en) * | 2018-12-18 | 2019-04-09 | 广西华银铝业有限公司 | A kind of method of alumina producer decomposing grading production continuous operation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106276995A (en) * | 2015-06-25 | 2017-01-04 | 沈阳铝镁设计研究院有限公司 | A kind of synthetic filter process in aluminum oxide production process |
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| EP0166053A1 (en) * | 1984-05-24 | 1986-01-02 | KAISER ALUMINUM & CHEMICAL CORPORATION | Improvements in the bayer process production of alumina hydrate |
| US5387405A (en) * | 1992-03-25 | 1995-02-07 | Nalco Chemical Company | Bayer liquor polishing |
| CN201324566Y (en) * | 2008-12-03 | 2009-10-14 | 沈阳铝镁设计研究院 | Leaf filtering system |
| CN101708859A (en) * | 2009-12-02 | 2010-05-19 | 贾启 | Process for Bayer process aluminum oxide production by replacing carbide slag with lime |
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| CN103043693A (en) * | 2013-01-17 | 2013-04-17 | 信发集团有限公司 | Bayer-method-based aluminum oxide production system using carbide slag instead of lime |
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2013
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| EP0166053A1 (en) * | 1984-05-24 | 1986-01-02 | KAISER ALUMINUM & CHEMICAL CORPORATION | Improvements in the bayer process production of alumina hydrate |
| US5387405A (en) * | 1992-03-25 | 1995-02-07 | Nalco Chemical Company | Bayer liquor polishing |
| CN201324566Y (en) * | 2008-12-03 | 2009-10-14 | 沈阳铝镁设计研究院 | Leaf filtering system |
| CN101708859A (en) * | 2009-12-02 | 2010-05-19 | 贾启 | Process for Bayer process aluminum oxide production by replacing carbide slag with lime |
| CN102515226A (en) * | 2011-12-22 | 2012-06-27 | 东北大学设计研究院（有限公司） | Decomposition and filtration method during alumina production process |
| CN103043693A (en) * | 2013-01-17 | 2013-04-17 | 信发集团有限公司 | Bayer-method-based aluminum oxide production system using carbide slag instead of lime |
| CN203159241U (en) * | 2013-01-17 | 2013-08-28 | 信发集团有限公司 | Comprehensive red mud treatment equipment |
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| 山西省史志研究院.氧化铝生产.《山西通志 第十四卷 冶金工业志》.中华书局,1999,(第1版),第389页. * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109592700A (en) * | 2018-12-18 | 2019-04-09 | 广西华银铝业有限公司 | A kind of method of alumina producer decomposing grading production continuous operation |
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Inventor after: Wang Ning Inventor after: Xu Wenqiang Inventor after: Yang Ying Inventor after: Shi Yujuan Inventor after: Luo Min Inventor before: Wang Ning Inventor before: Xu Wenqiang Inventor before: Yang Ying Inventor before: Shi Yujuan |
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Effective date of registration: 20170323 Address after: 110016 Heping District, Liaoning, Shenyang and Qing Street, No. 70 Patentee after: Northeast University Design & Research Institute Co., Ltd. Patentee after: Guizhou galuminium Aluminium Co. Ltd. Address before: 110006 Antu street, Heping District, Liaoning, China, No. 8, No. Patentee before: Northeast University Design & Research Institute Co., Ltd. |
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