Ash sorting device for electrolytic aluminum processing

Abstract

The invention discloses an ash sorting device for electrolytic aluminum processing, which comprises a sorting tank, a plurality of filter screens are arranged in the sorting tank, the pore diameters of the filter screens are sequentially reduced, the filter screens are obliquely arranged, the distance between every two adjacent filter screens is gradually reduced towards one side, and leakage holes are formed in the side wall of the sorting tank at the bottom ends of the filter screens; and a centrifugal device penetrates through the center of a top tank body of the sorting tank, and a feeding pipe penetrates through the position, close to the center, of the top tank body of the sorting tank. By means of the centrifugal device, disconnected particles can be rapidly broken and sorted out, beating of the edges of the filter screens and cleaning of the filter screens can be achieved by controlling the rotating speed of a motor, meanwhile, the disconnected particles can move to the topmost portion along the upper surface of an arc-shaped table, the moving distance of the disconnected particles is increased, the disconnected particles can also rub with the inner wall of the sorting tank, and the fracture probability of the disconnected particles can be increased through the two processes.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum, in particular to an ash sorting device for electrolytic aluminum processing. Background technique [0002] Electrolytic aluminum is aluminum obtained by electrolysis. The modern aluminum industry uses cryolite-alumina molten salt electrolysis. Molten cryolite is the solvent, alumina is used as the solute for electrolytic aluminum production, the carbon body is used as the anode, and the aluminum liquid is used as the cathode. Chemical reaction, namely electrolysis. The chemical reaction is mainly carried out through this equation: 2Al2O3+3C==4Al+3CO2. Anode: 2O2ˉ+C-4eˉ=CO2↑Cathode: Al3+3eˉ=Al. The anode products are mainly carbon dioxide and carbon monoxide gases, which contain a certain amount of harmful gases such as hydrogen fluoride and solid dust. In order to protect the environment and human health, it is necessary to purify the anode gas, remove harmful gases and dust, a...

AI Technical Summary

Problems solved by technology

[0003] When sorting the ash and slag, due to the large pore size of the filter on the top, the ash with smaller particles can only be sorted out after passing through multiple filters. If it moves with the large particles of ash, it is easy to cause It is sorted into the collection tank corresponding to the large particles, and at the same time, cracks will appear on the surface of part of the ash, and when it falls to the surface of the filter and breaks, the broken small particles cannot pass through the filter immediately screen, resulting in more ash remaining on the surface of the filter screen, and the separation efficiency is affected

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