Novel energy-saving corrosion-resistant anode steel claw for electrolyzing aluminum and design method thereof

Abstract

The invention belongs to the technical field of aluminum electrolyzing equipment, and discloses a novel energy-saving corrosion-resistant anode steel claw for electrolyzing aluminum and a design method thereof. The design method for the novel energy-saving corrosion-resistant anode steel claw for electrolyzing the aluminum comprises the following steps: performing simulation calculation on the designed maximal bearing force of Fmax, the safety coefficient of alpha, the effective cross section of the steel claw of S0 and the yield strength of the material of ReL when a half steel claw works byutilizing a computer, and acquiring the optimal proportional components of the material of the half steel claw; and calculating and analyzing the voltage drop of the half steel claw and a half aluminum claw in use by utilizing the computer, and acquiring an optimal composite claw voltage drop value. According to the novel energy-saving corrosion-resistant anode steel claw for electrolyzing the aluminum and the design method thereof, the voltage drop of an anode is reduced and the electric energy is saved by connecting the half steel claw and the half aluminum claw in parallel; the high-temperature corrosion of an anode claw caused by an electrolyte and a corrosive atmosphere can be effectively prevented by a thin graphene layer which coats the outside the overall anode claw, so that the service life of the anode claw is prolonged; the anode claw is not corroded; the conductive cross section is effectively remained; and the electric energy can also be saved greatly.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum equipment, and in particular relates to a novel energy-saving and anti-corrosion anode steel claw for electrolytic aluminum and a design method thereof. Background technique [0002] Currently, the closest existing technology in the industry: [0003] The power consumption per ton of aluminum produced by aluminum electrolysis is directly proportional to the average pressure drop of the electrolytic cell. Therefore, the most effective measure to improve the voltage drop of the electrolytic cell is to reduce the anode voltage drop. Steel claws are an important part of electrolytic aluminum anodes, so reducing the pressure drop of steel claws It is a key scientific problem to be solved to make the power consumption of electrolytic aluminum per ton of aluminum unavoidable. According to Ampere's law, when the current is constant, the voltage drop of the steel claw has a linear relationsh...

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Problems solved by technology

[0005] 1. A steel-copper composite anode steel claw adopts the lower end of a steel beam to connect copper steel claws. This technology has the disadvantage that copper is difficult to connect with graphite-connected phosphorus pig iron;

[0006] Two, a kind of anode steel claw of aluminum-steel composite structure, this method is to process sprue in steel frame interior, makes molten aluminum liquid directly pour into steel body inside, this method has solved the problem of the poor conductivity of explosive welding and friction welding, However, the defects of the conventional pouring technology and the exhaustion of gas during the pouring process are difficult to overcome;

[0007] 3. At present, the commonly used method to solve the corrosion prevention of steel claws is to use powdered alumina, which cannot effectively solve the oxidation corrosion of steel claws by electrolytic flue gas; the second is to use anode carbon protection rings, which cannot solve the problem of exposed steel claws. The external steel claw is oxidized and corroded by the electrolytic flue gas; the third is to prepare Al2O3 ceramic coating on the surface of the steel claw. This method has made great progress compared with method 1 and method 2, but the uniformity and bonding force of the coating are not well controlled. There will also be local premature corrosion damage that reduces the service life of the workpiece.

[0009] (1) The resistivity of the existing anode steel claws for electrolytic aluminum is on the high side, resulting in the need for higher voltage and a waste of electric energy;

[0010] (2) Susceptible to oxidation and corrosion of electrolytic flue gas, affecting the service life of the anode steel claw

[0013] A steel-copper composite anode steel claw uses the lower end of a steel beam to connect copper steel claws. This technology has the disadvantage that copper is difficult to connect with graphite-connected phosphorus pig iron;

[0014] An aluminum-steel composite structure anode steel claw, the method is to process the sprue inside the steel frame, so that the molten aluminum can be poured directly into the steel body, this method solves the problem of poor conductivity of explosive welding and friction welding, but conventional The deficiencies in the pouring technology and the gas discharge technology during the pouring process are difficult to overcome;

[0015] At present, the commonly used method to solve the corrosion prevention of steel claws is to use powdered alumina, which cannot effectively solve the oxidation corrosion of steel claws by electrolytic flue gas; the second is to use anodic carbon protection rings, which cannot solve the problem of exposed external The steel claw is oxidized and corroded by the electrolytic flue gas; the third is to prepare an Al2O3 ceramic coating on the surface of the steel claw. Occurrence of local premature corrosion damage reduces the service life of the workpiece

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