Aluminum oxide feeding system and method

Abstract

The invention discloses an aluminum oxide feeding system and an aluminum oxide feeding method. The aluminum oxide feeding system comprises a pulverizing machine and a feeding machine, wherein a feed port is formed in the upper portion of the pulverizing machine, a rotary guide pole is arranged in the pulverizing machine, pulverizing blades for stirring and pulverizing aluminum oxide powder insideare arranged on the rotary guide pole, the bottom of the pulverizing machine abuts against and communicates with the feeding machine, a hierarchical diverter which extends a dropping route of the aluminum oxide powder in the feeding device is arranged in the feeding device, a feeding port which enables the aluminum oxide to enter an electrolytic bath is formed in the end point of the powder routeof the hierarchical diverter, and the interior of the feeding machine is connected in series with a gas collection tube of the electrolytic bath through an air pipe. The aluminum oxide feeding systemand method can obviously improve dispersion and dissolution speed of the aluminum oxide, achieve uniform concentration distribution of the aluminum oxide, enable concentration of the aluminum oxide inthe electrolytic bath to fluctuate stably, reduce generation of precipitates, and are high in current efficiency, low in energy consumption, and especially suitable for acid feeding of the aluminum oxide.

Description

technical field [0001] The invention belongs to aluminum electrolysis technology, and in particular relates to an alumina blanking system and a blanking method thereof. Background technique [0002] Hall-Héroult electrolysis has been the only method for industrial aluminum smelting. As the main raw material of the aluminum electrolytic cell melt, the dispersion and dissolution of alumina in the electrolyte is of great significance for industrial production. For electrolytic cells with poor alumina dissolution and transport effects, not only will the anode effect be induced due to the local alumina concentration being too low, but also the alumina cannot be dissolved in time due to the local concentration being too high, resulting in local precipitation and increased The horizontal current of the aluminum liquid affects the stability of the electrolysis process, which in turn increases the energy consumption and reduces the current efficiency. In addition, the diffusion and...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to provide an aluminum electrolytic cell with good stability, stable feeding speed, uniform dispersion of aluminum oxide, and high current The alumina blanking system and its blanking method with high efficiency and low energy consumption are especially suitable for acid process alumina blanking

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