Aluminum electrolytic cell cathode with aluminum as cathode

Abstract

The invention discloses an aluminum electrolysis cell cathode as which aluminum is adopted, and relates to the improvement on aluminum electrolysis cell production with cryolite aluminum monoxide melt as an electrolyte and through a molten salt method. The cathode is characterized in that the structure of the cathode comprises an electrolysis cell body, cathode partition walls arranged in cell ledges at the two ends of the aluminum electrolysis cell body, and a cathode busbar entering the aluminum electrolysis cell body from side channels formed by the cathode partition walls and the inner walls of the cell ledges at the ends of the aluminum electrolysis cell body, wherein a bottom channel is arranged between the bottoms of the cathode partition walls and the lower bottom of the aluminum electrolysis cell body, and the side channels are formed by the cathode partition walls and the inner walls of the cell ledges at the ends of the aluminum electrolysis cell body. According to the aluminum electrolysis cell cathode as which aluminum is adopted, molten aluminum in which no cathode carbon block, no steel bar and no titanium boride coating exist is adopted as the cathode to replace a cathode composed of steel bars and a carbon block set. The defects that according to a traditional aluminum electrolysis cell, aluminum oxide deposit exists on cathode carbon blocks and cellular micro-batteries exist are eliminated. In the electrolysis production process, the problem that aluminum oxide and aluminum carbide which are deposited and generated at the furnace bottom pollute electrolysis molten aluminum does not exist.

Description

technical field

[0001] The invention discloses an aluminum electrolytic cell cathode which uses aluminum as the cathode, and relates to the improvement of an aluminum electrolytic cell produced by a molten salt method using cryolite-alumina melt as an electrolyte. Background technique

[0002] At present, conventional electrolytic aluminum production uses cryolite-alumina melt as the electrolyte, carbon as the anode, and a cathode system composed of liquid aluminum, cathode carbon block, and cathode steel rod as the cathode, and a direct current is applied to precipitate CO at the anode. 2 gas, and liquid aluminum is precipitated at the cathode. According to the current technology, the production of 1 ton of metal aluminum needs to consume about 15,000kw h of electricity (combined AC power consumption). Under the process conditions of aluminum electrolysis at 940-960°C, the energy utilization efficiency of aluminum electrolysis is less than 36% (converting the carbon consump...

Examples

Embodiment Construction

[0020] The cathode of an aluminum electrolytic cell with aluminum as the cathode, the structure of the cathode includes:

[0021] An electrolytic cell body 2, the electrolytic cell body is a concave cell body made of refractory-insulation material; a groove side 3a is provided on the upper edge of the electrolytic cell body;

[0022] The cathode partition wall is composed of a side refractory-insulation layer 2g and a side carbon block 2f. A partition wall, a bottom channel 2k is provided between the bottom of the partition wall and the lower bottom of the aluminum electrolytic cell body; the cathode partition wall and the inner wall-shaped side channel at the end of the aluminum electrolytic cell body;

[0023] The cathode busbar 2h, the cathode busbar enters the electrolytic cell body through the bottom channel 2k at the bottom of the partition wall.

[0024] In the aluminum electrolytic cell cathode using aluminum as the negative electrode of the present invention, its cat...

technical field

[0001] The invention discloses an aluminum electrolytic cell cathode which uses aluminum as the cathode, and relates to the improvement of an aluminum electrolytic cell produced by a molten salt method using cryolite-alumina melt as an electrolyte. Background technique

[0002] At present, conventional electrolytic aluminum production uses cryolite-alumina melt as the electrolyte, carbon as the anode, and a cathode system composed of liquid aluminum, cathode carbon block, and cathode steel rod as the cathode, and a direct current is applied to precipitate CO at the anode. 2 gas, and liquid aluminum is precipitated at the cathode. According to the current technology, the production of 1 ton of metal aluminum needs to consume about 15,000kw h of electricity (combined AC power consumption). Under the process conditions of aluminum electrolysis at 940-960°C, the energy utilization efficiency of aluminum electrolysis is less than 36% (converting the carbon consump...

Examples

Embodiment Construction

[0020] The cathode of an aluminum electrolytic cell with aluminum as the cathode, the structure of the cathode includes:

[0021] An electrolytic cell body 2, the electrolytic cell body is a concave cell body made of refractory-insulation material; a groove side 3a is provided on the upper edge of the electrolytic cell body;

[0022] The cathode partition wall is composed of a side refractory-insulation layer 2g and a side carbon block 2f. A partition wall, a bottom channel 2k is provided between the bottom of the partition wall and the lower bottom of the aluminum electrolytic cell body; the cathode partition wall and the inner wall-shaped side channel at the end of the aluminum electrolytic cell body;

[0023] The cathode busbar 2h, the cathode busbar enters the electrolytic cell body through the bottom channel 2k at the bottom of the partition wall.

[0024] In the aluminum electrolytic cell cathode using aluminum as the negative electrode of the present invention, its cat...

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