Equipment for preparing aluminum fluoride from electrolytic aluminum carbon residues

Abstract

The invention discloses equipment for preparing aluminum fluoride from electrolytic aluminum carbon residues, and belongs to the technical field of electrolytic aluminum carbon residue recycling, the equipment comprises a crushing device, a screening device, a leaching device and a filtering device, the crushing device is horizontally arranged on the ground, the screening device is arranged on the crushing device, the leaching device is arranged beside the crushing device and is in butt joint with the crushing device, and the filtering device is arranged beside the leaching device. Impurities in the electrolytic aluminum carbon residues are screened through the screening device firstly, then the electrolytic aluminum carbon residues are smashed through the smashing device, subsequent leaching and filtering are more thorough, the preparation purity of aluminum fluoride is improved, the screened and smashed electrolytic aluminum carbon residues are fully leached through the leaching device, And the filtering device is used for carrying out sufficient fluorine precipitation and filtrating on the leached liquid, so that the preparation efficiency is high.

Description

technical field [0001] The invention relates to the technical field of recycling electrolytic aluminum carbon slag, in particular to equipment for preparing aluminum fluoride from electrolytic aluminum carbon slag. Background technique [0002] With the rapid development of my country's electrolytic aluminum industry, the current annual production capacity is close to 40 million tons, accounting for more than half of the world's primary aluminum production capacity. In the production process of aluminum electrolysis, the carbon cathode is the most important structural part of the aluminum electrolytic cell. Above the carbon cathode for aluminum electrolysis is the aluminum liquid and electrolyte, and the electrolytic reaction of aluminum precipitation is carried out on the interface between it and aluminum. The DC current is exported out of the tank through the aluminum liquid, the bottom carbon block and the cathode steel rod. In the production of aluminum electrolysis, th...

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Problems solved by technology

[0004] The embodiment of the present invention provides an equipment for preparing aluminum fluoride from electrolytic aluminum carbon slag, so as to solve the problem that the electrolytic aluminum carbon slag is not screened during the treatment process, which affects the purity of the prepared aluminum fluoride, and the preparation process requires multiple times For fluorine leaching and filtering, the process is complex and costly, and the technical problems of low preparation efficiency

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