A kind of anode protection ring and preparation method thereof

Abstract

The invention belongs to the field of anode production, and in particular relates to the components, content and manufacturing process of a protective device for carbon anode steel claws. The technical problem to be solved by the present invention is to provide an anode protection ring with high mechanical strength and strong shock resistance and a preparation method thereof. In order to solve the above problems, the technical solution provided by the present invention is: an anode protection ring, the main components and weight percentage of the protection ring are: 70%-90% of electrolyte powder, 10%-30% of binder, the The binder is at least one of aluminum phosphate, polyacrylamide, polyvinyl chloride, epoxy resin and polyvinyl alcohol. The beneficial effects of the invention are as follows: 1. High mechanical strength; 2. Reduce carbon oxide gas discharge; 3. Reduce production cost; 4. Does not affect the quality of primary aluminum.

Description

technical field [0001] The invention belongs to the field of anode production, and in particular relates to the components, content and manufacturing process of a protective device for carbon anode steel claws. Background technique [0002] Aluminum anode protection rings are mostly made of carbon materials and asphalt as a binder. They are molded by pressure machinery and put on the anode steel claws after drying. This kind of protection ring has poor oxidation resistance and pressure resistance. Low intensity. Under the high temperature conditions of the electrolytic cell, if there is no insulation material covering, the carbon protection ring is easily oxidized into pieces by the air, and falls into the electrolytic cell during the pole changing operation or under the scouring of the electrolyte. On the one hand, the anode steel claw loses protection. The phenomenon of "clawing" occurs, which leads to the reduction of the grade of primary aluminum; on the other hand, the...

AI Technical Summary

Problems solved by technology

[0004] Patent No. CN 200910306843 patent document discloses a self-baked electrolytic anode steel claw protection ring and its preparation method. The components of the anode protection ring in the application document are alumina sol, electrolyte powder and alumina powder. The technical scheme The weak point is: the mechanical strength of the anode protective ring described in this technical proposal is low, and its reason is: 1. This protective ring is a self-baked protective ring, which is easily affected by the operation disturbance of the electrolyzer during its curing process, resulting in The protective ring is prone to cracks; 2. Alumina sol is used as the binder, and the alumina sol has a large water content, and the shrinkage rate is also large during the heating process, and the anode steel claw is easily damaged, resulting in the electrolyte being easily washed to the steel claw; 3. The The anode protection ring contains alumina powder, the electrolyte in the electrolytic cell will dissolve the alumina, and the protection ring is easy to loosen and break, resulting in a decrease in its anti-scourability