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Method for repairing local damage of cathode carbon block of aluminum electrolysis cell

A technology of cathode carbon block and aluminum electrolytic cell, which is applied in the field of local damage repair of cathode carbon block in aluminum electrolytic cell, can solve the problem of incomplete repair of damaged points, reduce repair cost and interference of other impurities, and achieve good repair effect, The effect of simple repair process

Pending Publication Date: 2021-12-07
YUNNAN RUNXIN ALUMINUM
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  • Claims
  • Application Information

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Problems solved by technology

In summary, the existing methods often lead to incomplete repair of damaged points

Method used

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  • Method for repairing local damage of cathode carbon block of aluminum electrolysis cell

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0018] figure 1 A method for repairing local damage of a cathode carbon block of an aluminum electrolytic cell is shown. The aluminum electrolytic cell in the prior art includes a cell body 1 , an anode 2 , a cathode carbon block 3 , a conductive square steel 4 , a flexible connecting strip 5 , an electrolyte 10 , and molten aluminum liquid 11 . When it is found that the cathode carbon block is partially damaged, repair it. The repair steps are as follows:

[0019] S1. When the electrolytic cell is in operation, the mass percentage of ferrosilicon in the molten aluminum in the cell suddenly rises too fast or continues to rise during regular analysis. Measure the temperature of the bottom of the cell, square steel and heat dissipation holes, and check the sudden rise. Find the roughly corresponding anode at the position that is too fast or c...

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Abstract

The invention provides a method for repairing local damage of a cathode carbon block of an aluminum electrolysis cell, which comprises the steps that a damaged anode is extracted from the electrolysis cell on line, and a right-angle drill rod is used for searching and determining a damaged point on the surface of an aluminum electrolysis cell cathode; crushed magnesite bricks are stacked to the damaged point; crushed crusting blocks are stacked on the magnesite bricks at the damaged points; powdery aluminum oxide is stacked on the crusting blocks, and a repairing material is completely covered; the electrolytic cell is electrified, and the temperature of conductive square steel at the damaged point is judged according to the temperature rising gradient of the conductive square steel at the corresponding damaged point at the bottom of the electrolytic cell; and when the repairing material is completely melted on the surface of a cathode carbon block, the repairing material uniformly fills the damaged point to form a whole, and the damage repairing of the cathode carbon block is completed. The method is simple in process, efficient, rapid and good in repairing effect.

Description

technical field [0001] The invention relates to the technical field of damage repairing of cathode carbon blocks in aluminum electrolytic cells, in particular to a method for repairing local damage of cathode carbon blocks in aluminum electrolytic cells. Background technique [0002] In the production process of aluminum electrolysis, the cathode carbon block of aluminum electrolysis will be partially damaged. In terms of physics, due to the factors of thermal expansion and uneven pressure of gravity, the cathode thermal gravitational force is uneven, resulting in physical extrusion damage of the cathode; in terms of chemistry , due to sodium penetration, cathode generation of aluminum carbide, electrocapillarity, aluminum and electrolytes penetrate into the gap of the cathode carbon block, resulting in cathodic consumable damage. If a damaged position is found in normal production, it must be repaired in time. The existing aluminum electrolytic cell repair mainly adopts on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/08
CPCC25C3/08
Inventor 钱云超杨永杨军龙周志昌张文学杜才德黄荣钢申太荣王锋张荐唐喜陈勇马自红管彦苍
Owner YUNNAN RUNXIN ALUMINUM