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Water quenching and separating treatment method for anode carbon slime in aluminum electrolysis

A technology of aluminum electrolysis anode and processing method, applied in the field of aluminum electrolysis, can solve the problems of high grinding cost, high processing cost, high processing difficulty, etc., and achieve the effects of simplified process, reduced dust pollution and reasonable energy utilization

Active Publication Date: 2016-01-13
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

The former is broken in the flotation process, the cost of grinding is high, and high-fluorine wastewater will be produced, and the treatment cost is high; the latter will produce fluorine-containing gas, which is more difficult to treat

Method used

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  • Water quenching and separating treatment method for anode carbon slime in aluminum electrolysis
  • Water quenching and separating treatment method for anode carbon slime in aluminum electrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1 Carbon slag treatment of electrolytic aluminum production enterprises with an annual output of 200,000 tons of aluminum.

[0060] The electrolytic aluminum plant with an annual production capacity of 200,000 tons adopts 300kA large-scale prebaked tank electrolysis technology and prebaked anode roasting technology. The annual output of carbon residue is 2,200 tons, and there are more than 8,000 tons of stockpiles. The composition of the reference carbon residue is as follows: the carbon content is 25-52%; the electrolyte component content is 75-48%.

[0061] combine figure 1 , carbon residue treatment implementation plan:

[0062] (1) A manpower vehicle-mounted water quenching box is adopted. The volume of the water quenching box is 0.6 cubic meters, and the amount of reclaimed water is 0.4 tons. The hot charcoal slag taken out is directly put into the water quenching box. The charcoal residue is subjected to rapid cooling and fragmentation. When the wate...

Embodiment 2

[0067] Example 2 Application of electrolytic aluminum enterprises with an annual output of 600,000 tons

[0068] The electrolytic aluminum plant with an annual production capacity of 600,000 tons adopts 350kA large-scale prebaked tank electrolysis technology and prebaked anode roasting technology. The annual output of carbon residue is 6400 tons / year.

[0069] The composition of the reference carbon residue is as follows: the carbon content is 35-50%; the electrolyte component content is 65-50%.

[0070] Carbon residue treatment implementation plan:

[0071] (1) A motor vehicle water quenching box and a spray washing device are adopted. The volume of the water quenching box is 0.6 cubic meters, and the amount of water is 0.4 tons. The hot charcoal slag taken out is directly put into the water quenching box. The charcoal residue is subjected to rapid cooling and fragmentation. When collecting about 130-150kg of carbon slag per vehicle, it is transported to the fixed grid s...

Embodiment 3

[0076] Example 3 Application of an industrial park with an annual output of 1.2 million tons of electrolytic aluminum

[0077] The electrolytic aluminum plant with an annual production capacity of 1.2 million tons adopts 350kA large-scale prebaked tank electrolysis technology and prebaked anode roasting technology. The annual output of carbon residue is more than 13,000 tons per year.

[0078] The composition of the reference carbon residue is as follows: the carbon content is 34-53%; the electrolyte component content is 66-47%.

[0079] Carbon residue treatment implementation plan:

[0080] (1) A motor vehicle water quenching box and a spray washing device are adopted. The volume of the water quenching box is 0.6 cubic meters, and the amount of water is 0.4 tons. The hot charcoal slag taken out is directly put into the water quenching box. The charcoal residue is subjected to rapid cooling and fragmentation. When collecting about 130-150kg of carbon slag per vehicle, it ...

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Abstract

The invention discloses a water quenching and separating treatment method for anode carbon slime in aluminum electrolysis, and belongs to the technical field of aluminum electrolysis. The water quenching and separating treatment method comprises the steps of carrying out water quenching on the thermal-state carbon slime, classifying and sorting the water-quenched carbon slime, dehydrating the water-quenched carbon slime through a centrifugal dehydrator, carrying out wet grinding on the carbon slime and sorting the carbon slime through a flotation machine, finally carbon-rich products and electrolyte-rich products are obtained, the carbon-rich products can be used for producing carbon products, and the electrolyte-rich products can be purified and then used in the aluminum electrolysis process. According to the invention, the coarse crushing step and the fine crushing step can be simplified, and therefore the procedures are simplified, dust pollution in the crushing steps and the ore grinding step is greatly reduced, and the energy can be utilized more reasonably. The water quenching and separating treatment method can be effectively combined with the existing wet grinding technology, the existing flotation technology and the existing fluorine-containing water treatment technology.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolysis, in particular to a method for comprehensive utilization and harmless treatment of anode carbon slag in the process of aluminum electrolysis. technical background [0002] In the process of aluminum electrolysis, the slag phenomenon occurs due to the erosion of the anode carbon block by the electrolyte, and the same is true for the cathode. Although the slag loss of carbon blocks can be reduced by improving the anode production process and electrolysis process, this phenomenon cannot be eliminated. Therefore, carbon slag in the electrolyte is an inevitable product of the carbon anode during the reaction process. Carbon slag affects the normal operation of aluminum electrolysis and needs to be salvaged from the electrolytic cell from time to time. Due to the immersion and penetration of electrolytes, carbon residues contain a large amount of electrolytes. Studies have shown that abou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/12B09B3/00
Inventor 赵俊学张涛贾柏林胡晓滨刘铁中施瑞盟梁李斯唐雯聃方钊
Owner 北京森泉伟业科技有限公司
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