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Pre-baked anode for aluminum electrolysis and its preparation method

A pre-baked anode and aluminum electrolysis technology, applied in the field of aluminum electrolysis, can solve the problems of large power consumption gap and low comprehensive energy utilization efficiency, and achieve the effects of improving efficiency, high comprehensive energy utilization rate and good liquidity

Active Publication Date: 2010-01-20
YUNNAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still a big gap compared with foreign countries, especially in terms of power consumption. The domestic average AC power consumption per ton of aluminum is 14,600kwh / t, which is far higher than that of foreign countries; as far as the current overall production status of electrolytic aluminum in my country is concerned , the comprehensive utilization efficiency of energy is about 15% lower than the international advanced level

Method used

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  • Pre-baked anode for aluminum electrolysis and its preparation method
  • Pre-baked anode for aluminum electrolysis and its preparation method
  • Pre-baked anode for aluminum electrolysis and its preparation method

Examples

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Effect test

Embodiment 1

[0021] 1) Optimal design of the prebaked anode shape: the inclined surface of the truss part on the upper part of the carbon anode is a concave surface, such as figure 1 1 in and image 3 As shown in 3; the four corners of the carbon anode are arc-shaped corners, such as figure 2 2 in ; the two long sides at the bottom of the carbon anode are square chamfers, such as image 3 Shown in 4.

[0022] 2) In the production process of the carbon anode (block), the scrap aluminum wire produced in the aluminum processing production process is mixed as an additive to improve the electrical conductivity of the carbon anode, that is, 1.5‰ of the aluminum wire is added in the production process of the carbon anode. During the process, when these aluminum wires change from solid phase to liquid phase, they are filled and compounded into the micropores of carbonaceous particles, so that the carriers of the carbon anode matrix increase, thus increasing the concentration of the carbon anode...

Embodiment 2

[0024] 1) The optimal design of the prebaked anode shape is the same as in Example 1;

[0025] 2) In the production process of carbon anode (block), the scrap aluminum wire produced in the aluminum processing production process is mixed as an additive to improve the electrical conductivity of the carbon anode, that is, 2.0‰ of aluminum wire is added in the production process of the carbon block. During the process, when these aluminum wires change from solid phase to liquid phase, they are filled and compounded into the micropores of carbonaceous particles, so that the carriers of the carbon anode matrix increase, thus increasing the concentration of the carbon anode carriers.

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Abstract

The invention relates to a prebaked anode cell and the preparation method. It comprises following steps: (1) designing the shape for prebaked anode cell; (2) adding waste corner aluminum wire produced in aluminum production process during carbon anode preparation, to improve the conductivity for cabon anode, the addition amount is 1.5- 2.0%., the aluminum wire is filled into the micropores when it is conversed into liquid from solid during calcination, to increase the carrier for carbon anode base material. The invention is characterized by saved raw material cost, easy operation and management for thermal- insulating cover material, good flowability of filled material, increased currency efficiency by 0.5%, reduced resources consumption, 4.44 ton of recovery waste aluminum, and reduced carbon dioxide emmision.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolysis, in particular to a prebaked anode for aluminum electrolysis and a preparation method thereof. Background technique [0002] In recent years, the domestic electrolytic aluminum industry has developed rapidly, its production scale has continued to increase, its technical level has been greatly improved, and its current efficiency and power consumption have made significant progress. However, there is still a big gap compared with foreign countries, especially in terms of power consumption. The domestic average AC power consumption per ton of aluminum is 14,600kwh / t, which is far higher than that of foreign countries; as far as the current overall production status of electrolytic aluminum in my country is concerned , the comprehensive utilization efficiency of energy is about 15% lower than the international advanced level. Therefore, promoting circular economy, energy saving and emis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/12
Inventor 田永万多稳丁吉林刘志祥郭峻周永全乐雪梅
Owner YUNNAN ALUMINUM
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