CN101603184B - Medium-grained carbon anode matched with 300KA aluminum electrolyzer - Google Patents
Medium-grained carbon anode matched with 300KA aluminum electrolyzer Download PDFInfo
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- CN101603184B CN101603184B CN2009100749989A CN200910074998A CN101603184B CN 101603184 B CN101603184 B CN 101603184B CN 2009100749989 A CN2009100749989 A CN 2009100749989A CN 200910074998 A CN200910074998 A CN 200910074998A CN 101603184 B CN101603184 B CN 101603184B
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Abstract
The present invention relates to a carbon anode processing method, in particular to a medium-grained carbon anode matched with a 300KA aluminum electrolyzer, which solves the problem that the prior art for manufacturing carbon anodes matched with aluminum electrolyzers is low in gas reactivity, high in the air permeability of the carbon anodes produced through small-particle formulation, high in the unit consumption of primary aluminum anodes, and the like. The preparation method comprises raw material crushing, screening, proportioning, mixing-kneading, molding and roasting, and is characterized in that raw materials are 59 to 84 percent of screened calcined coke, 0 to 25 percent of residual pole pieces and 14 to 18 percent of coal tar pitch; the range of the particle size of the raw materials at each level in the formulation is 8 to 0 mm; the purity of the raw materials in each grain size is required to be between 50 and 100 percent; the mixing-kneading temperature is 135 to 185 DEG C; the molding temperature is 120 to 160 DEG C; and the roasting temperature is 1,050 to 1,300 DEG C. The method can reduce anode consumption by 10 kg/t-Al and then can reduce the production cost of primary aluminum.
Description
Technical field
The present invention relates to a kind of carbon anode working method, be specially a kind of middle grade carbon anode of 300KA matched with aluminium electrolyser.
Background technology
Along with electrolyzer to large vol, the development of automation direction, the 300KA aluminium cell progressively becomes the first-selected grooved that domestic aluminium electrolysis enterprise updates, but supporting with it carbon anode is except physical dimension has certain variation, and production formula is still continued to use traditional macrobead prescription (15-0mm or 12-0mm or 10-0mm) or small-particle prescription (6-0mm or 4-0mm).By the carbon anode volume density that the macrobead prescription is produced, carbon dioxide reaction and air reactive are on the low side, the carbon anode air height that the small-particle prescription is produced, primary aluminum unit's anode consumption height.So aspect the selection of the prescription of carbon anode, bias toward and introduce and do not pay attention to independent development, it is not comprehensive that the manufacturing process of anode formula is described, and can not satisfy the demand of 300KA aluminium cell antianode quality.Therefore, that develops a kind of 300KA of being applicable to aluminium cell can reduce the primary aluminum production cost, and reaching energy-saving and cost-reducing supporting carbon anode just becomes the technical problem that needs to be resolved hurrily.
Summary of the invention
The present invention is on the low side in order to solve the solid/liquid/gas reactions that exists in the existing manufacturing matched with aluminium electrolyser carbon anode technology, the carbon anode air height that the small-particle prescription is produced, problem such as primary aluminum unit's anode consumption height and a kind of middle grade carbon anode of 300KA matched with aluminium electrolyser is provided.
The present invention is realized by following technical scheme, a kind of middle grade carbon anode of 300KA matched with aluminium electrolyser, its preparation method is, the fragmentation of raw material, screening, batching, mix pinch, moulding, roasting, feature is raw material composition, size composition and three main points of purity requirement; Raw material after for screening to forge the back burnt 59～84%, anode scrap broken 0～25%; Coal-tar pitch 14-18%, the size range of raw materials at different levels is 8-0mm in the prescription, also can not use the broken raw material of anode scrap, forges back Jiao 82～86%, coal-tar pitch 14-18%,
Formula rate is: 8mm2-4%, 8-4mm13-22%, 2-4mm11-18% ,-0.15mm33-40% ,-0.075mm23-27%, each grade material purity requires 50～100%,
Kneading temperature 135-185 ℃, mold temperature 120-160 ℃, maturing temperature 1050-1300 ℃.
Carbon anode according to institute of the present invention record scheme production, compared with the prior art have characteristics such as lower oxidation activity, low air and high volume density, can satisfy the demand of 300KA reinforcing current by aluminum electrolytic cell, upgrading consumption reduction, anode consumption 10kg/t-Al can be reduced, thereby the primary aluminum production cost can be reduced.
Embodiment
Embodiment 1, and a kind of middle grade carbon anode of 300KA matched with aluminium electrolyser, its preparation method be, the fragmentation of raw material, screening, batching, mix pinch, moulding, roasting,
A, raw material are composed as follows
Forge burnt (8～0) mm 84% in back, anode scrap broken (8～0) mm 0%, coal-tar pitch 16% (mass ratio)
So-called anode scrap is broken to be old carbon anode after pulverizing.Coal-tar pitch is meant medium temperature coal pitch or high temperature coal-tar pitch or modified coal asphalt.
B, size composition
| Granularity mm | +8 | -8+4 | -4+2 | -0.15 | -0.074 |
| Account for siccative % | ＜3 | 15±2 | 13±2 | 35±2 | 25±2 |
C, each grade material purity require (50～100) %.
135 ℃ of kneading temperatures, 160 ℃ of mold temperatures, 1050 ℃ of maturing temperatures.
Embodiment 2
A, raw material are composed as follows
Forge burnt (8～0) mm 79% in back, anode scrap broken (8～0) mm 5%, coal-tar pitch 16% (mass ratio)
B, size composition
| Granularity mm | +8 | -8+4 | -4+2 | -0.15 | -0.074 |
| Account for siccative % | ＜3 | 21±2 | 16±2 | 36±2 | 24±2 |
C, each grade material purity require (50～100) %.
185 ℃ of kneading temperatures, 120 ℃ of mold temperatures, 1300 ℃ of maturing temperatures.
Embodiment 3
A, raw material are composed as follows
Forge burnt (8～0) mm 76% in back, anode scrap broken (8～0) mm 10%, coal-tar pitch 14%
B, size composition
| Granularity mm | +8 | -8+4 | -4+2 | -0.15 | -0.074 |
| Account for siccative % | ＜3 | 15±2 | 16±2 | 36±2 | 24±2 |
C, each grade material purity require (50～100) %.
145 ℃ of kneading temperatures, 130 ℃ of mold temperatures, 1100 ℃ of maturing temperatures.
Embodiment 4
A, raw material are composed as follows
Forge burnt (8～0) mm 67% in back, anode scrap broken (8～0) mm 15%, coal-tar pitch 18%
B, size composition
| Granularity mm | +8 | -8+3 | -3+1 | -0.15 | -0.074 |
| Account for siccative % | ＜3 | 28±2 | 15±2 | 36±2 | 24±2 |
C, each grade material purity require (50～100) %.
155 ℃ of kneading temperatures, 140 ℃ of mold temperatures, 1150 ℃ of maturing temperatures.
Embodiment 5
A, raw material are composed as follows
Forge burnt (8～0) mm 59% in back, anode scrap broken (8～0) mm 25%, coal-tar pitch 16%
B, size composition
| Granularity mm | +8 | -8+3 | -3+1 | -0.15 | -0.074 |
| Account for siccative % | ＜3 | 19±2 | 12±2 | 36±2 | 24±2 |
C, each grade material purity require (50～100) %.
165 ℃ of kneading temperatures, 145 ℃ of mold temperatures, 1200 ℃ of maturing temperatures.
Embodiment 6
A, raw material are composed as follows
Forge burnt (8～0) mm 64% in back, anode scrap broken (8～0) mm 20%, coal-tar pitch 16%
B, size composition
| Granularity mm | +8 | -8+3 | -3+1 | -0.15 | -0.074 |
| Account for siccative % | ＜3 | 19±2 | 10±2 | 35±2 | 25±2 |
C, each grade material purity require (50～100) %.
175 ℃ of kneading temperatures, 150 ℃ of mold temperatures, 1250 ℃ of maturing temperatures.
Claims (2)
1. the middle grade carbon anode of a 300KA matched with aluminium electrolyser, its preparation method be, the fragmentation of raw material, screening, batching, mix pinch, moulding, roasting, it is characterized in that raw material is that to forge the back burnt 59～84%, anode scrap broken 0～25%; Coal-tar pitch 14-18%, the size range of raw materials at different levels is 8-0mm in the prescription, formula rate is: 8mm2-4%, 8-4mm13-22%, 2-4mm11-18% ,-0.15mm33-40% ,-0.075mm23-27%, each grade material purity requires 50～100%, kneading temperature 135-185 ℃, mold temperature 120-160 ℃, maturing temperature 1050-1300 ℃.
2. the middle grade carbon anode of 300KA matched with aluminium electrolyser according to claim 1, it is characterized in that raw material is for forging back burnt 86～82%, coal-tar pitch 14-18%, the size range of raw materials at different levels is 8-0mm in the prescription, formula rate is: 8mm2-4%, 8-4mm13-22%, 2-4mm11-18% ,-0.15mm33-40% ,-0.075mm23-27%, each grade material purity requires 50～100%, kneading temperature 135-185 ℃, mold temperature 120-160 ℃, maturing temperature 1050-1300 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100749989A CN101603184B (en) | 2009-07-24 | 2009-07-24 | Medium-grained carbon anode matched with 300KA aluminum electrolyzer |
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| CN2009100749989A CN101603184B (en) | 2009-07-24 | 2009-07-24 | Medium-grained carbon anode matched with 300KA aluminum electrolyzer |
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| CN101603184A CN101603184A (en) | 2009-12-16 |
| CN101603184B true CN101603184B (en) | 2011-07-20 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839393A (en) * | 2012-07-26 | 2012-12-26 | 济南海川投资集团有限公司 | Method for using petroleum coke fine powder in preparation of prebaked anode used for aluminum electrolysis |
| CN103030401B (en) * | 2012-12-17 | 2014-06-25 | 山东平阴丰源炭素有限责任公司 | Production method of low-air-permeability prebaked anode |
| CN103276408B (en) * | 2013-05-16 | 2015-07-01 | 嘉峪关索通预焙阳极有限公司 | Preparation method of high-quality prebaked anode for 500KA electrolytic cell |
| CN105369290A (en) * | 2015-11-23 | 2016-03-02 | 中国铝业股份有限公司 | Method for producing prebaked anode capable of lowering air permeability |
| CN106222700A (en) * | 2016-08-22 | 2016-12-14 | 中国铝业股份有限公司 | A kind of method utilizing anode scrap to prepare aluminum carbon anode |
| CN108179442B (en) * | 2018-01-25 | 2019-07-26 | 索通发展股份有限公司 | Prebaked anode and preparation method thereof |
| CN111254462A (en) * | 2020-03-29 | 2020-06-09 | 新疆神火炭素制品有限公司 | Carbon anode of electrolytic cell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86101854A (en) * | 1986-03-25 | 1987-01-24 | 包头铝厂 | Anode paste in aluminium electrolysis |
| CN1485465A (en) * | 2003-09-02 | 2004-03-31 | 中国铝业股份有限公司 | Method for producing semi-graphite prebaked anode |
| CN1580331A (en) * | 2003-08-11 | 2005-02-16 | 姬军伟 | Aluminium electrolysis prebaked anode raw block preparation composition |
| CN101037776A (en) * | 2006-03-17 | 2007-09-19 | 东北大学设计研究院（有限公司） | Green anode skeletal material monosystem manufacturing technique |
-
2009
- 2009-07-24 CN CN2009100749989A patent/CN101603184B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86101854A (en) * | 1986-03-25 | 1987-01-24 | 包头铝厂 | Anode paste in aluminium electrolysis |
| CN1580331A (en) * | 2003-08-11 | 2005-02-16 | 姬军伟 | Aluminium electrolysis prebaked anode raw block preparation composition |
| CN1485465A (en) * | 2003-09-02 | 2004-03-31 | 中国铝业股份有限公司 | Method for producing semi-graphite prebaked anode |
| CN101037776A (en) * | 2006-03-17 | 2007-09-19 | 东北大学设计研究院（有限公司） | Green anode skeletal material monosystem manufacturing technique |
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