A kind of ash separation device for electrolytic aluminum processing

Abstract

The invention discloses a sorting device for ash and slag for electrolytic aluminum processing, which comprises a sorting tank. A plurality of filter screens with sequentially decreasing apertures are arranged inside the sorting tank. The filter screens are arranged obliquely, and two adjacent filter screens The distance between the nets gradually becomes smaller to one side, and a leak hole is opened on the side wall of the sorting tank at the bottom of the filter screen; A feed pipe is provided through the position near the center of the tank body; the invention can quickly break and separate the broken particles through the centrifugal device, and can realize the impact on the edge of the filter by controlling the speed of the motor , to clean the filter screen, and at the same time, because the broken particles can move to the top along the upper surface of the arc table, not only the moving distance of the broken particles is increased, but the broken particles can also rub against the inner wall of the sorting tank. Can increase the breakage chance of disconnected particles.

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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