Production of aluminium by low-temperature electrolytic process and special aluminium electrolytic tank thereof

An aluminum electrolytic cell and electrolytic cell technology, applied in the field of non-ferrous metal materials, can solve the problems of low dissolution rate and low alumina solubility, achieve high solubility and dissolution rate, overcome low-temperature aluminum electrolysis, and high conductivity

Inactive Publication Date: 2005-09-28
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0003] The purpose of the present invention is to propose a method for producing aluminum at low temperature in view of the shortcomings of low alumina solub

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  • Production of aluminium by low-temperature electrolytic process and special aluminium electrolytic tank thereof

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Embodiment 1

[0010] Example 1, the current intensity of the aluminum electrolytic cell is 180kA, and the material used for the cathode is TiB 2 and MoSi 2 Composite material, MoSi 2 8% by weight, TiB 2 The weight percent content is 92%, and it is made by powder metallurgy forming method. The material used for the anode is metal inert material, the composition is Sn, Cu, Ni, Fe, and the weight percentage content is 20%, 60%, 10%, 10% respectively. It is made by powder metallurgy method. Both the cathode and the anode are made into flat plates. The electrodes in the cell are vertically arranged in the form of Yang-Yin-Yang-Yin·-Yang, the surfaces of the electrodes are parallel to each other, and the pole distance of the electrolytic cell is 2.5cm. Both the electrolytic cell material and the aluminum sink material use silicon nitride combined with silicon carbide materials. The electrolyte used in the electrolysis is a potassium cryolite molten salt system, wherein the potassium cryolite ...

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Abstract

The present invention belongs to the field of non-ferrous metal material, and is especially low temperature aluminum producing process and special aluminum electrolyzing bath. The present invention features the low temperature aluminum electrolyzing process at 700-850 deg.c in molten potassium cryolite salt system with alumina as material. The aluminum electrolyzing bath consists of cathode, wires, anode, electrolytic bath, electrolyte and aluminum liquid collecting tank. The present invention uses molten potassium cryolite salt system as electrolyte with high electric conductivity, great alumina dissolubility and great alumina dissolving rate to overcome the demerits of low temperature aluminum electrolysis. The low temperature aluminum electrolysis creates the condition for using inertial material. The present invention can realize high current efficiency, low power consumption and low cost.

Description

technical field [0001] The invention belongs to the field of non-ferrous metal materials, and in particular relates to a method for producing aluminum by low-temperature electrolysis and a dedicated aluminum electrolytic cell. Background technique [0002] Aluminum is produced by sodium cryolite-alumina molten salt electrolysis. Aluminum electrolysis production requires a lot of electricity, and electricity consumption accounts for about 30% of the cost of aluminum electrolysis production. The main disadvantages of modern industrial aluminum electrolysis are high electrolysis temperature, as high as 920-950°C, high energy consumption, and DC power consumption is 13500kWh / t aluminum to 15000kWh / t aluminum. Low-temperature aluminum electrolysis is one of the important measures to solve the problems existing in the modern aluminum electrolysis industry. Low-temperature aluminum electrolysis can save electricity. There are many methods for research on low-temperature aluminum e...

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Application Information

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IPC IPC(8): C25C3/06C25C3/18
Inventor 卢惠民
Owner UNIV OF SCI & TECH BEIJING
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