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Novel cathode structure coke particle laying method for 180kA electrolytic bath

A cathode structure and electrolytic cell technology, which is applied in the field of new cathode structure coke particle laying of 180kA electrolytic cells, can solve the problems of difficult cryolite removal, uneven roasting temperature, and influence on conductive quality, so as to ensure the quality of electrified roasting, cathode The effect of cleaning the surface and increasing the working speed

Inactive Publication Date: 2011-08-31
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is easy to scatter cryolite on the boss, because solid cryolite cannot conduct electricity, so if the cryolite scattered on the boss is not cleaned, the conductive quality will be affected when the coke particles are laid and roasted with electricity , which in turn leads to uneven conductivity of the cathode and anode and uneven firing temperature, which seriously affects the entire firing quality.
However, it is very difficult to remove the scattered cryolite, which is not only labor-intensive and time-consuming, but also difficult to completely remove. This method generally takes more than 4 hours to lay an electrolytic cell, and the efficiency is low.

Method used

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  • Novel cathode structure coke particle laying method for 180kA electrolytic bath
  • Novel cathode structure coke particle laying method for 180kA electrolytic bath
  • Novel cathode structure coke particle laying method for 180kA electrolytic bath

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Pull and transport the furnace charging materials such as coke particles and anodes to the empty space before the new slotting in advance.

[0037] 2. Lower the anode bus bar to the lower limit, 10cm away from the horizontal cover, and adjust the gyro to 380. Clean the cathode and clean up the sundries in the tank.

[0038] 3. Filling and leveling the diversion trenches and aluminum sinks

[0039] 1) Cover the cathode boss with a plastic film, leaving the groove area where the diversion groove and aluminum sink are located.

[0040] 2) Use cryolite or broken electrolyte to fill up the diversion ditch and the aluminum sink between the cathodes to prevent oxidation of the cathode surface in the diversion ditch and the aluminum sink during the roasting process.

[0041] 3) Cut the plastic film covering the surface of the cathode boss and turn it outward on both sides to cover the diversion groove and the aluminum sink area without pulling out the plastic film.

[0042]...

Embodiment 2

[0047] 1. Pull and transport the furnace charging materials such as coke particles and anodes to the empty space before the new slotting in advance.

[0048] 2. Lower the anode bus bar to the lower limit, 10cm away from the horizontal cover, and adjust the gyro to 380. Clean the cathode and clean up the sundries in the tank.

[0049] 3. Filling and leveling the diversion trenches and aluminum sinks

[0050] 1) Cover the cathode boss with a plastic film, leaving the groove area where the diversion groove and aluminum sink are located.

[0051] 2) Use cryolite or broken electrolyte to fill up the diversion ditch and the aluminum sink between the cathodes to prevent oxidation of the cathode surface in the diversion ditch and the aluminum sink during the roasting process.

[0052] 3) Cut the plastic film covering the surface of the cathode boss and turn it outward on both sides to cover the diversion groove and the aluminum sink area without pulling out the plastic film.

[005...

Embodiment 3

[0058] 1. Pull and transport the furnace charging materials such as coke particles and anodes to the empty space before the new slotting in advance.

[0059] 2. Lower the anode bus bar to the lower limit, 10cm away from the horizontal cover, and adjust the gyro to 380. Clean the cathode and clean up the sundries in the tank.

[0060] 3. Filling and leveling the diversion trenches and aluminum sinks

[0061] 1) Cover the cathode boss with a plastic film, leaving the groove area where the diversion groove and aluminum sink are located.

[0062] 2) Use cryolite or broken electrolyte to fill up the diversion ditch and the aluminum sink between the cathodes to prevent oxidation of the cathode surface in the diversion ditch and the aluminum sink during the roasting process.

[0063] 3) Cut the plastic film covering the surface of the cathode boss and turn it outward on both sides to cover the diversion groove and the aluminum sink area without pulling out the plastic film.

[006...

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Abstract

The invention relates to a prebaked aluminum electrolytic bath, particularly a novel cathode structure coke particle laying method for a 180kA electrolytic bath. The method provided by the invention comprises the following steps: laying a plastic film, filling up a diversion trench and an aluminum convergence groove, laying coke particles, and hanging the cathode. The method provided by the invention prevents cryolite from spreading on the cathode lug boss, and avoids cleaning the lug boss, thereby greatly lowering the labor intensity of workers, doubling the work efficiency and saving both time and labor. The method avoids the phenomena of uneven cathode / anode electric conduction and uneven baking temperature since the cryolite spreading on the lug boss is not thoroughly cleaned, thereby ensuring the entire baking quality and laying firm foundation for efficient and smooth production of the electrolytic bath in the later period. The invention is suitable for laying coke particles of the novel structure electrolytic bath. The embodiment of the invention is designed by taking a 180kA aluminum electrolytic bath as an example, and for other types of baths, the coke particles can be laid in a similar way.

Description

technical field [0001] The invention relates to a roasting process for a prebaked aluminum electrolytic cell, in particular to a method for laying coke particles with a novel cathode structure for a 180kA electrolytic cell. Background technique [0002] Because there is a convex platform on the cathode of the new structure electrolytic cell, the coke particle laying method is different from that of the planar cathode electrolytic cell. The original coke grain laying method is as follows: first fill the diversion ditch between the cathodes and the aluminum sink groove with cryolite, and then lay coke grains on the boss. This method is easy to scatter cryolite on the boss, because solid cryolite cannot conduct electricity, so if the cryolite scattered on the boss is not cleaned, the conductive quality will be affected when the coke particles are laid and roasted with electricity , which in turn leads to uneven conduction of the cathode and anode and uneven firing temperature,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/08
Inventor 王煊贾永皎毛永庆杨得生胡志梅邢朝东刘锋
Owner GUIZHOU BRANCH CHINA ALUMINUM IND