Non-stick electrolyte crust breaking hammer head for producing electrolytic aluminum

Abstract

The invention provides a non-stick electrolyte crust breaking hammer head for producing electrolytic aluminum. The crust breaking hammer head comprises a hammer body, and the part, contacted with electrolyte, of the hammer body at least in crust breaking is made of any one of a carbon material and silicon carbide bonded silicon nitride. The problem of sticking and lump generation of electrolyte can be completely solved, in addition, a non-metal material is adopted as a matrix and neither a compound coating nor the matrix contains harmful elements influencing the mass of electrolytic aluminum, so that the non-stick electrolyte crust breaking hammer head is high-temperature-resistant and corrosion-resistant, not only can the anti-oxidative, corrosion-resistant and wear-resistant performances of the part, contacted with 920-960DEG C electrolyte, of the lower part of the hammer head be met, but also iron element can be fundamentally prevented from entering molten aluminum.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum production equipment, and in particular relates to a non-stick electrolyte shelling hammer used for electrolytic aluminum production. Background technique [0002] At present, the pre-baked electrolytic cell alumina blanking adopts automatic intermediate point blanking, and each electrolytic cell is generally equipped with three to six Q235 steel shelling hammers for alternate shelling and blanking, and the shelling cylinder is controlled by a solenoid valve. The hammer head breaks the hard crust on the surface of the electrolyte to form holes, which serve as the feeding point of alumina. This method can well realize the automatic control of alumina feeding, but according to the process requirements, each shelling hammer has to hit about 1400 times a day and night, and each shelling must rub against the shell and soak in the electrolyte 2-3 seconds, frequent shelling actions will ca...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem of "cucurbit head" caused by common carbon steel or alloy steel material for shelling hammer heads in the prior art, and provides a non-stick electrolyte shelling hammer head for electrolytic aluminum production, which perfectly solves the problem The problem of electrolyte sticking to the long bag. In addition, non-metallic materials are used as the substrate. The composite coating and the substrate do not contain harmful elements that affect the quality of electrolytic aluminum. They have high temperature resistance and corrosion resistance. ℃ The anti-oxidation, anti-corrosion and anti-wear properties of the electrolyte contact part can fundamentally prevent iron elements from entering the aluminum liquid

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