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Method for producing aluminum electrolyte by using aluminum electrolysis waste materials and recycling carbon

An aluminum electrolysis and electrolyte technology, applied in the field of waste resource recycling, can solve the problems of unutilized valuable elements, high environmental risk of landfill method, unqualified product quality of flotation method, etc., and achieves less harmful impurities and moisture content low effect

Active Publication Date: 2014-04-16
云南蓝天铝业环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods have their own deficiencies, such as the landfill method has high environmental risks, valuable elements are not used, as a fuel is subject to supporting restrictions and valuable elements are not used, and the product quality of the flotation method is not up to standard, and it is impossible to achieve continuous scale production.

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  • Method for producing aluminum electrolyte by using aluminum electrolysis waste materials and recycling carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Put 100Kg of raw material electrolysis waste cathode carbon blocks into a jaw crusher for crushing, and then into a ball mill for crushing through an 80-150 mesh sieve, add 2Kg of diesel oil, coal flotation GF oil 0.6Kg, and enter the micro-bubble countercurrent flotation column to separate to obtain an underflow product 30Kg and foam product 70Kg, the underflow product is centrifugally filtered, and carbon is removed by an intermediate frequency furnace. The foam product is filtered and dried to obtain the target carbon powder 69.5Kg. The flue gas generated during the preparation process is first absorbed by the second spraying absorption tower, and then discharged through the activated alumina adsorption tower. The waste water is recycled through precipitation and discharged up to the standard. The main component of the slag produced by the treatment is CaF 2 , can be used as fluorite.

[0039] After testing, the carbon content of the electrolyte is 1.5%, the fix...

Embodiment 2

[0041]Put 100 Kg of raw material electrolysis waste cathode carbon blocks into a jaw crusher for crushing, and then into a ball mill for crushing through an 80-150 mesh sieve, add 2.1Kg of diesel oil, coal flotation 0.7Kg of GF oil, and enter the micro-bubble countercurrent flotation column for separation to obtain The underflow product is 33Kg and the foam product is 67Kg. The underflow product is centrifugally filtered and decarbonized by an intermediate frequency furnace. The separated foam product was filtered and dried to obtain 66.5Kg of target carbon powder. The flue gas generated during the preparation process is first absorbed by the second spraying absorption tower, and then discharged through the activated alumina adsorption tower. The waste water is recycled through precipitation and discharged up to the standard. The main component of the slag produced by the treatment is CaF 2 , can be used as fluorite.

[0042] After testing, the carbon content of the electroly...

Embodiment 3

[0044] Put 100Kg of raw material electrolysis waste cathode carbon blocks into a jaw crusher for crushing, and then into a ball mill for crushing through a 80-150 mesh sieve, add 2.2Kg of diesel oil, coal flotation GF oil 0.8Kg, and enter the micro-bubble countercurrent flotation column to separate to obtain an underflow The product is 32Kg and the foam product is 68Kg. The underflow product is centrifugally filtered, and the intermediate frequency furnace is used to remove carbon. The power of the intermediate frequency induction furnace is controlled at 350KW. The obtained foam product was press-filtered and dried to obtain 67.5 kg of target carbon powder. The flue gas generated during the preparation process is first absorbed by the second spraying absorption tower, and then discharged through the activated alumina adsorption tower. The waste water is recycled through precipitation and discharged up to the standard. The main component of the slag produced by the treatment is...

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Abstract

The invention discloses a method for producing aluminum electrolyte by using aluminum electrolysis waste materials and recycling carbon. The method comprises the following steps: pretreating, floating and separating, preparing and post-treating. The method specifically comprises the following steps: crushing the aluminum electrolysis waste materials and magnetically selecting to remove scrap iron; separating the pre-treated aluminum electrolysis waste materials to obtain a bottom flow product and a foam product; carrying out filtering, carbon removing and crushing on the bottom flow product obtained by separating to obtain target electrolyte for the aluminum; carrying out filter pressing and drying on the foam product obtained by separating to obtain target carbon powder; and recycling smoke and wastewater generated in the preparation process and discharging after the standards are reached. The method takes wastes which need to be urgently treated as raw materials; all resources are recycled and utilized and waste gas is collected and purified; the produced aluminum electrolyte is low in water content and less in harmful impurities, and is an ideal raw material for aluminum electrolysis production; the floated carbon powder can be used as aluminum electrolysis cell bottom paste or can also be used as a dye for bottom carbon block production or metallurgy production.

Description

technical field [0001] The invention belongs to the technical field of recycling waste resources, and in particular relates to a method for recycling aluminum electrolysis waste materials to produce aluminum electrolyte and recovering carbon. Background technique [0002] At present, the carbon content of waste cathode carbon blocks in domestic aluminum electrolytic overhaul cells is 60%-80%, and because they contain 20%-40% fluorine-containing impurities, they are hazardous wastes, and their production volume increases with the increase in electrolytic aluminum production. Domestic aluminum factories mainly use landfill, supplementary fuel for alumina and cement production, fluorite substitute for iron furnace, and flotation to separate and recover carbon and impurities. These methods have their own deficiencies, such as high environmental risk of landfill method, unused valuable elements, limited supporting and unutilized valuable elements as fuel, unqualified product qual...

Claims

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Application Information

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IPC IPC(8): C25C3/18C01B31/02C01B32/05
Inventor 邹彪
Owner 云南蓝天铝业环保科技有限公司
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