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Innocent treatment device and process for scrap materials disassembled from aluminum electrolytic cells

A harmless treatment, aluminum electrolytic cell technology, applied in the direction of solid waste removal, etc., can solve the problems of lack of harmless treatment and utilization means, and achieve the effect of low treatment cost, elimination of potential hazards, and simple and easy method.

Active Publication Date: 2016-02-24
北京森泉伟业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is still a lack of effective means of harmless treatment and utilization of mixed material waste such as dismantled refractory bricks in electrolyzers that have been landfilled or stockpiled

Method used

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  • Innocent treatment device and process for scrap materials disassembled from aluminum electrolytic cells
  • Innocent treatment device and process for scrap materials disassembled from aluminum electrolytic cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 Dismantling waste treatment of electrolytic aluminum production enterprises with an annual output of 200,000 tons of aluminum

[0034] (1) Basic information:

[0035] The electrolytic aluminum plant with an annual production capacity of 200,000 tons has been established for 30 years. The dismantling waste of the electrolytic cell is safely landfilled. About 250,000 tons of waste have been piled up, and the average soluble fluorine content is 420mg / L.

[0036] (2) Application method

[0037] Set up 3 cleaning tanks (indicated by A, B, and C in this part), adopt the soaking method, and operate alternately. The specific project is: A is the new charge, and the flow rate of the first-level dissolution is 9m 3 / h, the temperature is 50 degrees; B after the first-stage treatment of leaching slag, the second-stage dissolution, the flow rate is 6m 3 / h, the temperature is 40 degrees; C three-stage dissolution, the flow rate is 6m 3 / h, the temperature is 40 degre...

Embodiment 2

[0043] Example 2 Application of electrolytic aluminum enterprises with an annual output of 600,000 tons

[0044] (1) Basic information

[0045] The electrolytic aluminum plant with an annual production capacity of 600,000 tons has been built and operated for 25 years. The waste from electrolytic cell dismantling is safely landfilled. About 600,000 tons of waste have been stockpiled, and the average soluble fluorine content is 450mg / L;

[0046] Set up 3 cleaning tanks (indicated by A, B, and C in this part), adopt the soaking method, and operate alternately. The specific project is: A is the new charge, and the flow rate of the first-level dissolution is 9m 3 / h, the temperature is 50 degrees; B after the first stage of leaching slag, the second stage of dissolution, the flow rate is 6m 3 / h, the temperature is 40 degrees; C three-stage dissolution, the flow rate is 6m 3 / h, the temperature is 40 degrees and the time is 3 days;

[0047] The product indicators obtained afte...

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PUM

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Abstract

The invention relates to the technical field of innocent treatment of scrap materials disassembled from aluminum electrolytic cells and provides an innocent treatment device and process for scrap materials disassembled from aluminum electrolytic cells. The method is suitable for treatment of the scrap materials disassembled from the aluminum electrolytic cells. The device comprises a bucket elevator, a first-stage cleaning tank, a second-stage cleaning tank, a third-stage cleaning tank, a first-stage spraying device, a second-stage spraying device, a third-stage spraying device, a liquid collection tank, a material guide tank, a fluorine settling tank and a control device. According to the method, the scrap materials disassembled from the aluminum electrolytic cells are treated through a grading leaching method. The method for recycling the scrap materials disassembled from the aluminum electrolytic cells comprehensively is easy to implement and low in treatment cost and is especially suitable for solid waste treatment for existing electrolytic cell waste cell lining stockpiling or an existing landfill, the content of soluble fluorine in the scrap materials disassembled from the aluminum electrolytic cells can be lowered below 50 mg / L and meets the national discharge standard, and the potential hazard of the soluble fluorine can be eliminated thoroughly.

Description

technical field [0001] The invention relates to the technical field of harmless treatment of dismantling waste of an aluminum electrolytic cell, and relates to a harmless treatment device and process for dismantling waste of an aluminum electrolytic cell. Treatment of fluorine-containing solid waste in safe landfill. technical background [0002] The main equipment of electrolytic aluminum production is aluminum electrolytic cell. In the process of aluminum electrolysis, the carbon cathode is swollen and scrapped due to the penetration of impurities such as fluorine and sodium. It needs to be overhauled and replaced every 3 to 5 years. The tank dismantling waste generated during the overhaul process is the main solid waste generated by the aluminum industry. One of them is mainly waste cathodes and refractory materials. Aluminum electrolytic cell dismantling waste materials contain soluble fluorine, which are hazardous solid wastes and are prohibited to be discarded at wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/00
Inventor 赵俊学张涛贾柏林刘铁中胡晓滨施瑞盟李小明唐雯聃方钊
Owner 北京森泉伟业科技有限公司