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Method for roasting and preheating aluminum electrolysis cell using direct currents

An aluminum electrolytic cell and electrolytic cell technology, applied in the field of electrolysis, can solve the problems of unsuitable opening of the cell, high risk of electric shock, complicated operation, etc., and achieve the effects of reducing the start-up cost of roasting, good roasting effect, and uniform roasting temperature.

Inactive Publication Date: 2013-02-06
YUNNAN RUNXIN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this roasting method uses the alternating current in the workshop to pass through the metal resistance to heat and roast the electrolytic tank, which is not suitable for large-scale electrification and opening of the tank, and the operation is complicated and the risk of electric shock is high.

Method used

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  • Method for roasting and preheating aluminum electrolysis cell using direct currents

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The electrolytic heat roasting preheating method for the electrolytic cell provided by the invention comprises the steps of filling the tank, energizing roasting and removing the metal resistance device, specifically through the following steps (such as figure 1 shown):

[0029] A. Clean the furnace, and lay a layer of cryolite on the surface of cathode carbon block 1 and artificial leg 2, with a thickness of 1±0.2mm;

[0030] B. Install the anode carbon block 3. When installing the anode carbon block, pay special attention to re-tightening the small box fixture to prevent the anode carbon block from sliding down;

[0031] C. Install the radiation heating tube 4, check the anode 3 and then lift the anode to install the radiation heating tube 4, and install a thermocouple probe in the tank to detect the heating temperature;

[0032] D. After installing the radiation heating tube 4, spread a layer of high temperature resistant asbestos board 6 with a thickness of 1.0cm o...

Embodiment 2

[0040] The electrolytic heat roasting preheating method for the electrolytic cell provided by the invention comprises the steps of filling the tank, energizing roasting and removing the metal resistance device, specifically through the following steps (such as figure 1 shown):

[0041] A. Clean the furnace, and lay a layer of cryolite on the surface of cathode carbon block 1 and artificial leg 2, with a thickness of 1±0.2mm;

[0042] B. Install the anode carbon block 3. When installing the anode carbon block, pay special attention to re-tightening the small box fixture to prevent the anode carbon block from sliding down;

[0043] C. Install the radiation heating tube 4, check the anode 3 and then lift the anode to install the radiation heating tube 4, and install a thermocouple probe in the tank to detect the heating temperature;

[0044] D. Lay a layer of high temperature resistant asbestos board 6 with a thickness of 1.5cm on the anode seam, middle seam and edge after the r...

Embodiment 3

[0050] The electrolytic heat roasting preheating method for the electrolytic cell provided by the invention comprises the steps of filling the tank, energizing roasting and removing the metal resistance device, specifically through the following steps (such as figure 1 shown):

[0051] A. Clean the furnace, and lay a layer of cryolite on the surface of cathode carbon block 1 and artificial leg 2, with a thickness of 1±0.2mm;

[0052] B. Install the anode carbon block 3. When installing the anode carbon block, pay special attention to re-tightening the small box fixture to prevent the anode carbon block from sliding down;

[0053] C. Install the radiation heating tube 4, check the anode 3 and then lift the anode to install the radiation heating tube 4, and install a thermocouple probe in the tank to detect the heating temperature;

[0054] D. Lay a layer of high temperature resistant asbestos board 6 with a thickness of 1.3cm on the anode seam, middle seam and edge after the r...

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Abstract

The invention relates to a method for roasting and preheating an aluminum electrolysis cell using direct currents and is characterized in that radiation heating tubes are used for replacing scorched particles to serve as heating media, and currents of an electrolytic cell series are connected, so that heat produced by the radiation heating tubes in a electrolysis cell cavity is transferred to the surrounding to heat, warm and roast linings and anodes in an electrolysis cell cathode continuously in radiation, convection and heat conduction modes, a heating device is detached after the temperature reaches or approaches a roasting start temperature of the electrolysis cell, and electrolyte is infused to start the heating device. Compared with traditional roasting methods, the method for roasting and preheating the aluminum electrolysis cell using direct currents has the advantages that the roasting effect is good, the energy consumption is low, the environment benefit is good, the labor intensity is low and the like.

Description

technical field [0001] The invention relates to a method for preheating an electrolytic cell by direct current electric heating and roasting, and belongs to the technical field of electrolysis. Background technique [0002] With the development of large-scale, large-scale and automated production of electrolytic aluminum enterprises, and the promotion of measures such as emphasizing environmental protection, increasing production and increasing efficiency, reducing energy consumption, and prolonging the service life of equipment, newer, higher requirements. At present, the aluminum electrolytic production process includes the roasting and preheating of the aluminum electrolytic cell, starting and controlling the electrolytic production, etc. Among them, the roasting preheating is an important link in the aluminum electrolytic production process. Lining, make the roasting temperature close to or reach the normal production temperature, prevent the water and ash in the lining...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/06
Inventor 杨万章张春生苏其军汪宏伟邢大庆杨金星杨军龙
Owner YUNNAN RUNXIN ALUMINUM
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