CN104141153A - Treatment method for electrolytic tank carbon residue - Google Patents
Treatment method for electrolytic tank carbon residue Download PDFInfo
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- CN104141153A CN104141153A CN201310355679.1A CN201310355679A CN104141153A CN 104141153 A CN104141153 A CN 104141153A CN 201310355679 A CN201310355679 A CN 201310355679A CN 104141153 A CN104141153 A CN 104141153A
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Abstract
The invention discloses a treatment method for electrolytic tank carbon residue. According to the method, during pole changing and edge tightening of an electrolytic tank, to-be-treated carbon residue is laid in a pole sealing fine crushed material. Specifically, according to the treatment method for the electrolytic tank carbon residue, during pole changing and edge tightening of the electrolytic tank, along with a conventional pole sealing procedure, the to-be-treated carbon residue is laid in a pole sealing fine crushed material, the carbon residue spontaneously combusts and generates gas for emission, the electrolyte in the carbon residue condenses and enters the electrolytic tank, thus maximumly recovering the electrolyte in the carbon residue. Normal operation of the electrolytic tank is not influenced, the processes of carbon residue stacking, transportation and treatment are reduced, the labor intensity is greatly reduced, and the working time is saved, the production efficiency is improved, and the pollution of the processes to the environment can be eliminated. With the advantages of simple process and convenient operation, the method not only realizes recycling of electrolyte in the carbon residue, but also has no need of input of any cost and equipment, thus being suitable for large-scale industrial application.
Description
Technical field
The invention belongs to aluminum electrolysis technology field, be specifically related to a kind for the treatment of process of electrolyzer carbon slag.
Background technology
In electrolyzer production run process, anode block is the electrical conductor of electrolyzer, and along with electrolysis production is constantly carried out, anode block produces periodically and consumes, and under the height-limited prerequisite of anode block, needs circulative replacing.Owing to there being certain quality problems in anode block quality and proportioning raw materials, in the process constantly consuming at anode block, there is selective oxidation reaction, some carbon granules on anode block skeleton come off to fall into and in electrolyzer, form carbon slag.Owing to being subject to electrolytical immersion and infiltration, in the pore of carbon slag, be full of ionogen.
The generation of carbon slag in electrolyzer, brings larger negative impact not only to electrolysis production technical qualification, and increases electrolytical loss waste, contaminate environment.At present, conventional carbon slag treatment process is that acid hydrolyzation or flotation process are extracted the fluoride salt in carbon slag.Acid hydrolyzation is first with mineral acid, the fluoride salt in carbon slag to be changed into HF volatilization, then absorbs HF with basic solution; Flotation process is first that carbon sizing is thin, adds flotation machine, makes carbon dust float over solution surface, pulls out after carbon dust, then extract fluoride salt from solution.Although above-mentioned two kinds of methods can reclaim the fluoride salt in carbon slag, also have complex process, cost of investment is high, and the waste liquid of generation is difficult, and the problem that environmental pollution is more serious is unfavorable for that large-scale industrialization is produced and application.
Summary of the invention
The treatment process that the object of this invention is to provide a kind of electrolyzer carbon slag, technique is simple, easy to operate, without cost and equipment investment, realizes electrolytical recycle in carbon slag.
In order to realize above object, the technical solution adopted in the present invention is: a kind for the treatment of process of electrolyzer carbon slag, when carrying out electrolyzer change poles receipts limit, is layed in pending carbon slag in the superfine particle of envelope.
The superfine particle of described envelope is aluminum oxide and electrolytical little block mixture.
Pending carbon slag is layed in to the superfine particle of envelope at the middle and upper levels.
Comprise the following steps:
1) electrolyzer is installed after new anode block, first covers one deck and seals superfine particle, and thickness is 8～12cm, forms the first envelope utmost point layer;
2) pending carbon slag is laid on the first envelope utmost point layer to the layer of carbon that formation thickness is 5～8cm;
3) on layer of carbon, cover one deck again and seal the smooth sealing of superfine particle, thickness is 5～10cm, forms the second envelope utmost point layer;
4) layer of carbon is along with the consumption of electrolyzer Anodic carbon piece moves down gradually, and temperature raises gradually, and the spontaneous combustion of carbon slag produces gaseous emission, and the electrolyte condensation in carbon slag also enters electrolyzer.
The particle diameter of described carbon slag is not more than 2cm.
The treatment process of electrolyzer carbon slag of the present invention, is layed in pending carbon slag in the superfine particle of envelope, and layer of carbon is along with the consumption of electrolyzer Anodic carbon piece moves down gradually, and carbon when temperature reaches 600 ℃ in carbon slag starts spontaneous combustion, produces CO
2with CO gaseous emission, the electrolyte condensation in carbon slag also enters electrolyzer, reclaims to greatest extent the ionogen in carbon slag, reaches the object of carbon spontaneous combustion removal in carbon slag, electrolyte circulation utilization.
The treatment process of electrolyzer carbon slag of the present invention, when electrolyzer change poles is received limit, along with conventional envelope utmost point program, pending carbon slag is layed in the superfine particle of envelope, reclaims to greatest extent the ionogen in carbon slag, technique is simple simultaneously, easy to operate, both realize electrolytical recycle in carbon slag, without dropping into any cost and equipment, be applicable to heavy industrialization application again; Use method of the present invention, carbon slag is to remove by spontaneous combustion, and exceeds the heat that consumes electrolyzer, and in electrolyzer, electrolytic liquid surface carbon slag content there is no obvious increase, illustrates that method of the present invention does not affect the normal operation of electrolyzer; Use method of the present invention, the carbon slag of pulling out can be directly used in to the envelope utmost point from electrolyzer, reduced the operation that carbon slag muck is put, transported and processes, greatly reduce labour intensity, economize labor time, improved production efficiency, and eliminated the pollution of these operations to environment.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
Embodiment 1
The treatment process of the electrolyzer carbon slag of the present embodiment, comprises the following steps:
1) electrolyzer is installed after new anode block, first covers one deck and seals superfine particle, and thickness is 10cm, forms the first envelope utmost point layer; The superfine particle of described envelope is aluminum oxide and electrolytical little block mixture;
2) pending carbon slag is laid on the first envelope utmost point layer to the layer of carbon that formation thickness is 5cm;
3) on layer of carbon, cover one deck again and seal the smooth sealing of superfine particle, thickness is 5cm, forms the second envelope utmost point layer;
4) layer of carbon is along with the consumption of electrolyzer Anodic carbon piece moves down gradually, and temperature raises gradually, and the spontaneous combustion of carbon slag produces gaseous emission, and the electrolyte condensation in carbon slag also enters electrolyzer.
Embodiment 2
The treatment process of the electrolyzer carbon slag of the present embodiment, comprises the following steps:
1) electrolyzer is installed after new anode block, first covers one deck and seals superfine particle, and thickness is 8cm, forms the first envelope utmost point layer; The superfine particle of described envelope is aluminum oxide and electrolytical little block mixture;
2) pending carbon slag is laid on the first envelope utmost point layer to the layer of carbon that formation thickness is 8cm;
3) on layer of carbon, cover one deck again and seal the smooth sealing of superfine particle, thickness is 10cm, forms the second envelope utmost point layer;
4) layer of carbon is along with the consumption of electrolyzer Anodic carbon piece moves down gradually, and temperature raises gradually, and the spontaneous combustion of carbon slag produces gaseous emission, and the electrolyte condensation in carbon slag also enters electrolyzer.
Embodiment 3
The treatment process of the electrolyzer carbon slag of the present embodiment, comprises the following steps:
1) electrolyzer is installed after new anode block, first covers one deck and seals superfine particle, and thickness is 12cm, forms the first envelope utmost point layer; The superfine particle of described envelope is aluminum oxide and electrolytical little block mixture;
2) pending carbon slag is laid on the first envelope utmost point layer to the layer of carbon that formation thickness is 6cm;
3) on layer of carbon, cover one deck again and seal the smooth sealing of superfine particle, thickness is 8cm, forms the second envelope utmost point layer;
4) layer of carbon is along with the consumption of electrolyzer Anodic carbon piece moves down gradually, and temperature raises gradually, and the spontaneous combustion of carbon slag produces gaseous emission, and the electrolyte condensation in carbon slag also enters electrolyzer.
Claims (4)
1. a treatment process for electrolyzer carbon slag, is characterized in that: when carrying out electrolyzer change poles receipts limit, pending carbon slag is layed in the superfine particle of envelope.
2. the treatment process of electrolyzer carbon slag according to claim 1, is characterized in that: pending carbon slag is layed in to the superfine particle of envelope at the middle and upper levels.
3. the treatment process of electrolyzer carbon slag according to claim 2, is characterized in that: comprise the following steps:
1) electrolyzer is installed after new anode block, first covers one deck and seals superfine particle, and thickness is 8～12cm, forms the first envelope utmost point layer;
2) pending carbon slag is laid on the first envelope utmost point layer to the layer of carbon that formation thickness is 5～8cm;
3) on layer of carbon, cover one deck again and seal the smooth sealing of superfine particle, thickness is 5～10cm, forms the second envelope utmost point layer;
4) layer of carbon is along with the consumption of electrolyzer Anodic carbon piece moves down gradually, and temperature raises gradually, and the spontaneous combustion of carbon slag produces gaseous emission, and the electrolyte condensation in carbon slag also enters electrolyzer.
4. according to the treatment process of the electrolyzer carbon slag described in claim 1,2 or 3, it is characterized in that: the particle diameter of described carbon slag is not more than 2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310355679.1A CN104141153B (en) | 2013-08-15 | 2013-08-15 | A kind of processing method of electrolytic cell carbon slag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310355679.1A CN104141153B (en) | 2013-08-15 | 2013-08-15 | A kind of processing method of electrolytic cell carbon slag |
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| CN104141153A true CN104141153A (en) | 2014-11-12 |
| CN104141153B CN104141153B (en) | 2016-05-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957487A (en) * | 2021-11-11 | 2022-01-21 | 河南娄科本环境科技有限公司 | Method for recovering electrolyte in carbon slag by using heat of electrolytic cell |
| CN114381763A (en) * | 2022-01-24 | 2022-04-22 | 甘肃东兴铝业有限公司 | Reduction treatment method for anode carbon slag generated by aluminum electrolytic cell |
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| CN1358581A (en) * | 2001-11-20 | 2002-07-17 | 舒大平 | Harmless treatment and comprehensive utilization method for aluminium electrolytic carbon slag and waste cathode material |
| CN101063215A (en) * | 2007-05-31 | 2007-10-31 | 中国铝业股份有限公司 | Method for extracting electrolyte in aluminum electrolytic anodic carbon residue |
| CN101255566A (en) * | 2007-12-17 | 2008-09-03 | 中国铝业股份有限公司 | Method for reclaiming electrolyte in carbon dross of aluminium electrolysis |
| CN102978659A (en) * | 2012-12-04 | 2013-03-20 | 贵州铝城铝业原材料研究发展有限公司 | Deep comprehensive resource utilization method for electrolytic cell overhaul slag |
| CN102989743A (en) * | 2012-12-04 | 2013-03-27 | 贵州铝城铝业原材料研究发展有限公司 | Method for recycling slag slurry of overhauling groove slag of electrolytic cell |
| CN103088365A (en) * | 2013-02-01 | 2013-05-08 | 贵阳冶金机电工艺有限公司 | Clean production process of electrolytic aluminum |
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2013
- 2013-08-15 CN CN201310355679.1A patent/CN104141153B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1358581A (en) * | 2001-11-20 | 2002-07-17 | 舒大平 | Harmless treatment and comprehensive utilization method for aluminium electrolytic carbon slag and waste cathode material |
| CN101063215A (en) * | 2007-05-31 | 2007-10-31 | 中国铝业股份有限公司 | Method for extracting electrolyte in aluminum electrolytic anodic carbon residue |
| CN101255566A (en) * | 2007-12-17 | 2008-09-03 | 中国铝业股份有限公司 | Method for reclaiming electrolyte in carbon dross of aluminium electrolysis |
| CN102978659A (en) * | 2012-12-04 | 2013-03-20 | 贵州铝城铝业原材料研究发展有限公司 | Deep comprehensive resource utilization method for electrolytic cell overhaul slag |
| CN102989743A (en) * | 2012-12-04 | 2013-03-27 | 贵州铝城铝业原材料研究发展有限公司 | Method for recycling slag slurry of overhauling groove slag of electrolytic cell |
| CN103088365A (en) * | 2013-02-01 | 2013-05-08 | 贵阳冶金机电工艺有限公司 | Clean production process of electrolytic aluminum |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957487A (en) * | 2021-11-11 | 2022-01-21 | 河南娄科本环境科技有限公司 | Method for recovering electrolyte in carbon slag by using heat of electrolytic cell |
| CN113957487B (en) * | 2021-11-11 | 2022-05-06 | 河南娄科本环境科技有限公司 | Method for recovering electrolyte in carbon residue by using heat of electrolytic cell |
| CN114381763A (en) * | 2022-01-24 | 2022-04-22 | 甘肃东兴铝业有限公司 | Reduction treatment method for anode carbon slag generated by aluminum electrolytic cell |
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| CN104141153B (en) | 2016-05-04 |
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