Processing technology of electrolytic aluminum

Abstract

The invention relates to an electrolytic aluminum processing technology which comprises the following steps: mixing electrolytes except aluminum oxide, dissolving the aluminum oxide in cryolite serving as a solvent for electrolytic reaction of the aluminum oxide, heating the electrolyte mixture except the aluminum oxide until the electrolyte mixture is in a molten state, and then adding a cryolite solution containing the aluminum oxide to obtain a melt; an electrode of an electrolytic bath is powered on, the melt obtained in the step A is placed in the electrolytic bath and then electrolyzed at the temperature of 800-820 DEG C, the current density is 1A / cm < 2 >, and molten aluminum obtained after electrolysis is obtained; an existing filtering device structure is improved, in the using process of the improved filtering device structure, the anti-blocking effect of the filtering net can be achieved, in this way, in the using process of the improved filtering device structure, filtering net holes cannot be blocked for a short time, and therefore the service life of the filtering net can be longer; therefore, in the actual use process, the production and maintenance cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of electrolytic aluminum processing, in particular to a processing technology of electrolytic aluminum. Background technique [0002] Electrolytic aluminum carbon-containing hazardous waste includes carbon slag, spent cathode carbon blocks (including carbon materials such as tamping paste, side carbon blocks), residual electrode cleaning materials, and overhaul slag, etc., because they contain toxic substances such as soluble fluoride Included in the "National Hazardous Waste List" - HW48 Non-ferrous metal smelting waste - salt slag and scum produced in the process of electrolytic aluminum. Carbon slag, in the production process of electrolytic aluminum, due to various reasons such as long-term erosion and washing of electrolyte, uneven combustion, selective oxidation, and unqualified quality, the anode carbon block and cathode carbon block cause carbon particles to fall off, in the electrolytic cell Carbon...

AI Technical Summary

Problems solved by technology

[0003] In the electrolytic aluminum processing process, it is necessary to go through the filtration process, but as the filtration time continues due to the clogging of impurities, it is easy to block the filter mesh, which invisibly prolongs the filtration time and reduces the filtration efficiency.

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