Automatic aluminum oxide charging system for aluminum electrolysis based on linear drive circuit

Abstract

The invention discloses an automatic aluminum oxide charging system for aluminum electrolysis based on a linear drive circuit. The automatic aluminum oxide charging system is characterized by being composed of a concentration detection sensor (8), a variable frequency motor (1), an aluminum oxide pressurizing pump (2), a charging box (3), a buffer (4), a material conveying pipe (9), a pressure gauge (5), an electromagnetic valve (6) and an automatic control system (7). The automatic control system (7) is composed of a transformer T, a voltage input circuit, a signal triggering circuit, a logic switching circuit, an electromagnetic valve control circuit and the variable frequency motor linear drive circuit. The variable frequency motor linear drive circuit is composed of a driving chip U3, a secondary side circuit and a microprocessing circuit. According to the automatic aluminum oxide charging system, the variable frequency motor linear drive circuit is used for driving the motor, the driving stability of the variable frequency motor linear drive circuit is better so that the aluminum oxide pressurizing pump can be used for stably pressurizing aluminum oxide, and charging is more even.

Description

technical field [0001] The invention relates to the field of aluminum electrolysis, in particular to an automatic alumina feeding system for aluminum electrolysis based on a linear drive circuit. Background technique [0002] Aluminum electrolysis production adopts molten salt electrolysis process, using aluminum electrolytic cell as equipment, alumina as electrolysis raw material, and cryolite electrolyte to dissolve alumina to produce metal aluminum through electrochemical reaction. The alumina dissolved in the electrolyte is continuously consumed during the electrolysis process, and there are several alumina bins and several alumina feeders on the aluminum electrolytic cell to replenish. The current alumina feeders are all constant volume feeders driven by cylinders. This constant-volume feeder has a fixed chamber, a linked feed port and discharge port, the cylinder moves back and forth, the feeder completes one charge and discharge, and the alumina material in the mater...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the traditional alumina feeder cannot feed on demand according to the concentration of alumina in the electrolytic cell, cannot keep the concentration of alumina stable, increases the power consumption and material consumption of aluminum electrolysis, and reduces the efficiency. Defects, provide an automatic alumina feeding system for aluminum electrolysis based on a linear drive circuit

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