An aluminum electrolytic cell waste slag comprehensive treatment system

Abstract

The invention relates to a comprehensive treatment system for aluminum electrolytic cell waste residues and belongs to the technical field of electrolytic aluminum waste treatment. The comprehensive treatment system comprises at least two of a treatment system A, a treatment system B, a treatment system C and a treatment system D, wherein the treatment system A comprises a leaching bin and a reaction bin, and the discharge outlet of the leaching bin is connected with the feeding inlet of the reaction bin; the treatment system B comprises a leaching bin, a solid-liquid separating device and a reaction bin unit which are sequentially connected; the treatment system C comprises a leaching bin, a floatation unit and a solid-liquid separating device, the discharge outlet of the leaching bin is connected with the feeding inlet of the floatation unit, and the discharge outlet of the floatation device is connected with the feeding inlet of the solid-liquid separating device; the treatment system D comprises a leaching bin and a solid-liquid separating device connected with the leaching bin, and the discharge outlet of the leaching bin is connected with the feeding inlet of the solid-liquid separating device. The comprehensive treatment system for the aluminum electrolytic cell waste residues has the advantages that sufficient recycling and harmless treatment of the electrolytic aluminum residues can be achieved, and the system can adapt to various aluminum electrolytic cell waste residue treatment processes.

Description

Technical field [0001] The invention relates to a comprehensive treatment system for aluminum electrolytic tank waste residues, belonging to the technical field of electrolytic aluminum waste treatment. Background technique [0002] The electrolytic aluminum overhaul slag is the lining of the waste tank of the electrolytic aluminum plant, which mainly includes cathode carbon blocks, refractory bricks, pastes, insulation bricks, refractory powder, refractory mortar, insulation boards, infiltrated metals and electrolytes, and a small amount of aluminum nitride and cyanide Salt, its composition includes about 33% of carbonaceous materials, about 30% of fluorine-containing materials, about 34% of refractory insulation materials (mainly alumina) and a small amount of other materials (aluminum carbide, aluminum nitride) And aluminum-iron alloys, etc.). The remaining part of the overhaul slag after removing the steel rod and the cathode carbon block still contains soluble fluoride and ...

AI Technical Summary

Problems solved by technology

However, this system can only discharge the harmful ions into harmless substances by removing cyanide and fluorine from the overhaul slag, and cannot realize the recycling and reuse of useful resources in it, resulting in a waste of resources

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