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Electrorefining trough wet-process starting method

An electrolytic refining and refining tank technology, which is applied in the field of refined aluminum smelting, can solve the problems of short tank life and high impulse voltage, and achieve the effects of prolonging tank life, small impact voltage and reducing production costs

Inactive Publication Date: 2004-01-14
GUIZHOU BRANCH CHINA ALUMINUM IND
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AI Technical Summary

Problems solved by technology

The advantage of this roasting starting method is that it is easy to operate, but at the same time, there are also problems such as high impulse voltage at the moment of starting, and the liquid alloy enters the lining of the tank before the electrolyte, resulting in short service life of the tank.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0006] Embodiment of the present invention: first arrange the heating electric furnace in the electrolytic refining tank, slowly raise the temperature, within 24 hours, make the temperature rise from room temperature to 100°C, and within 24 to 48 hours, make the temperature in the tank rise from 100°C to 150°C ℃, then dismantle the heating furnace, place the cathode on the anode carbon block, install it on the cathode bus bar with a clamp, lift the cathode bus bar so that the bottom palm of the cathode is 2cm away from the bottom of the furnace; inject the electrolyte solution with a temperature above 800 °C into the refining tank Inside, when the electrolyte liquid submerges the bottom palm of the cathode, it starts to gradually transmit power, and the process of power transmission is as follows:

[0007] Before 15000A:

[0008] 5000A-7000A-9000A-11000A-13000A-15000A

[0009] Then send power to 60000A according to the following process:

[0010] 15000A-20000A-25000A-30000A-...

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Abstract

A wet method for starting up the electrolytic refining tank, especially for the aluminium-refining production of refined aluminium includes such steps as using heater to calcine said electrolytic refining tank, putting cathode on the carbon block as anode, lifting the cathode bus, filling electrolyte in the electrolytic refining tank, applying current to 6000 A gradually, filling anode alloy liquid in the electrolytic refining tank while gradually lifting cathode bus, and slowly filling molten cathode aluminium in the tank while lifting cathode bus to proper height. Its advantages are simple operation, low impact voltage, long service service life of tank and low cost.

Description

Technical field: [0001] The invention relates to a method for smelting refined aluminum. technical background: [0002] At present, the roasting start-up method of three-layer liquid aluminum electrolytic refining in China adopts the following method: first, the electrolytic tank is roasted by external heating, and after reaching a certain temperature, liquid aluminum alloy is injected into the tank, and then liquid electrolyte is injected, and then direct current is applied to start. Operation, and use the process of alloy solidification and then melting to further roast the tank lining. The advantage of this firing start-up method is that it is easy to operate, but at the same time, there are also problems such as high impulse voltage at the start-up moment, and the liquid alloy enters the lining of the tank before the electrolyte, resulting in short service life of the tank. Invention content: [0003] The purpose of the present invention is to provide a liquid electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/06
Inventor 龚春雷刘钢谢青松高淑兰项阳向容驿朱伟黎云刘辛
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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