Cathode structure for reducing horizontal current in molten aluminum

A technology of horizontal current and cathode structure, which is applied in the field of cathode structure to reduce the horizontal current in molten aluminum, can solve the problems of uneven distribution in the length direction, reduced current efficiency, high current density of cathode carbon blocks, etc., so as to achieve uniform distribution of cathode current. , The effect of reducing horizontal current and reducing energy consumption per ton of aluminum

Active Publication Date: 2013-04-03
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE +1
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  • Summary
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  • Application Information

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Problems solved by technology

In the electrolytic cell of this structure, there is a very big disadvantage in the cathode conductive structure: because the cathode steel rod and the cathode carbon block are placed horizontally in the same direction, a very large horizontal current is generated in the aluminum liquid, which is in line with the vertical magnetic field in the aluminum liquid The combined action produces electromagnetic force, which drives liquid aluminum to flow and fluctuate in the electrolytic cell. If the horizontal current in the electrolytic cell is too large and unevenly distri

Method used

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  • Cathode structure for reducing horizontal current in molten aluminum
  • Cathode structure for reducing horizontal current in molten aluminum
  • Cathode structure for reducing horizontal current in molten aluminum

Examples

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[0024] Example 1

[0025] Such as figure 1 , 2 The cathode structure shown in the present invention for reducing the horizontal current in the aluminum liquid includes a cathode carbon block 1. A cathode steel rod 2 is provided under the cathode carbon block 1. One end of the cathode steel rod 2 is connected to the cathode bus bar, and the cathode steel rod 2 It is fixed or casted on the lower part of the cathode carbon block 1. The cathode steel rod 2 is provided with a separation seam 3 along the length direction. In this embodiment, a cathode steel rod 2 is provided with two separation seams 3 with different lengths. The slit 3 is set on the side close to the center of the carbon block, so that during the current conduction process of the cathode structure, the current is divided and led out by three parts.

[0026] The partition 3 is provided with a partition insulating material 4 to insulate the different parts of the cathode steel rod 2 divided by the partition 3 from each ot...

Example Embodiment

[0027] Example 2

[0028] The partition 3 in Example 1 is as Figure 4 Shown is the inclined split seam, such as image 3 The lower part of the cathode steel rod 2 shown has a part protruding from the lower surface of the cathode carbon block 1.

[0029] Of course, if there are one or more separation seams, it can be realized that the current is shunted. The difference is that the effect of the shunt is different, and the degree of contribution to the reduction of the horizontal current is different, but this method can achieve the purpose of reducing the horizontal current. . When the number of separation seams is 2-50, the length of the separation seams decreases sequentially from the inner side to the outer side.

[0030] The present invention adjusts the combined resistance of the cathode carbon block and the cathode steel rod by changing the structure of the cathode steel rod, the connection mode of the cathode steel rod and the cathode carbon block, etc., without changing the...

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Abstract

The invention relates to a cathode structure for reducing the horizontal current in molten aluminum. The cathode structure comprises a cathode carbon block and a cathode steel bar arranged below the cathode carbon block. The cathode structure is characterized in that the cathode steel bar is provided with a separation seam in the length direction, a separation seam insulating material is arranged in the separation seam, the region under the end of the cathode steel bar between the bottom of the cathode steel bar and the bottom of the separation seam is an insulator, and an upper portion of the cathode steel bar is connected to the cathode carbon block by an electric conductor. According to the invention, the cathode structure disclosed herein has strong practicability; without changing the electrical discharge mode of a cathode, a horizontal current in molten aluminum is reduced, the distribution of a cathode current is uniform, the stability of an electrolytic tank is improved, a service life of the electrolytic tank is prolonged, the electrolytic tank can efficiently and stably operate under the condition of a low electrode distance, consumption of each ton of aluminum is effectively reduced, and obvious energy-saving effects are obtained.

Description

technical field [0001] The invention relates to a cathode structure, in particular to a cathode structure capable of reducing the horizontal current in aluminum liquid in the field of producing primary aluminum by Hall-Eroux electrolysis. Background technique [0002] Metal aluminum is produced industrially by molten salt electrolysis, that is, electrolytically dissolving alumina in an electrolyte with molten cryolite as the main component. At present, the main method used is the Hall-Heroult electrolysis method. [0003] The direct equipment for the production of electrolytic aluminum is an electrolytic cell. The electrolytic cell is mainly composed of two parts, one part is the anode, usually made of carbon materials, and the other part is the cathode, which is made of carbon blocks and lining materials. [0004] The aluminum electrolytic cell is connected in series in the whole electrolytic series. The current enters the electrolytic cell from the anode, passes through t...

Claims

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Application Information

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IPC IPC(8): C25C3/08
CPCC25C3/08C25C3/16
Inventor 周东方杨晓东刘雅锋刘伟邹智勇刘铭胡红武张钦崧白斌
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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