Production method of low-air-permeability prebaked anode

A technology of air permeability and prebaked anode, which is applied in the field of aluminum electrolysis, can solve the problems of low air permeability, high absolute value of prebaked anode air permeability, and large fluctuations, so as to improve the overall quality and change the general air permeability The effect of high and stable indicators

Active Publication Date: 2013-04-10
山东平阴丰源炭素有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for producing prebaked anodes with low air permeability, which solves the problems of high absolute value and large fluctuation of air permeability of existing prebaked anodes

Method used

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  • Production method of low-air-permeability prebaked anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Petroleum coke calcining: Petroleum coke is calcined at a high temperature of 1250-1350°C without air to obtain calcined coke.

[0022] (2) Crushing, sieving, and grinding: crush the calcined coke, and then sieve it with a vibrating sieve to obtain calcined coke particles with a particle size of 6-3mm, 3-1mm and 1-0mm; The post-focus particles are ground into a fine powder with a particle size of less than 0.075mm by a pulverizer, and the Brownian value of the fine powder is 2800.

[0023] (3) Ingredients, kneading, molding:

[0024] Weigh the calcined coke particles and fine powder with a particle size of 6-3mm, 3-1mm, and 1-0mm in proportion, add them to the kneading pot and mix them evenly. The various materials in the mixture are calculated by weight percentage:

[0025] particle size

6-3mm

3-1mm

1-0mm

Content%

24%

27%

49%

[0026] Among them, the particle size is less than 0.075mm, and the amount of material is 2...

Embodiment 2

[0031] (1) Petroleum coke calcining: Petroleum coke is calcined at a high temperature of 1250-1350°C without air to obtain calcined coke.

[0032] (2) Crushing, sieving, and grinding: crush the calcined coke, and then sieve it with a vibrating sieve to obtain calcined coke particles with a particle size of 6-3mm, 3-1mm and 1-0mm; The post-focus particles are ground into a fine powder with a particle size of less than 0.075mm by a pulverizer, and the Brown value of the fine powder is 3150.

[0033] (3) Ingredients, kneading, molding:

[0034] Weigh the calcined coke particles and fine powder with a particle size of 6-3mm, 3-1mm, and 1-0mm in proportion, add them to the kneading pot and mix them evenly. The various materials in the mixture are calculated by weight percentage:

[0035] particle size

6-3mm

3-1mm

1-0mm

Content%

22%

28%

50%

[0036] Among them, the particle size is less than 0.075mm, and the amount of material is 27%....

Embodiment 3

[0041] (1) Petroleum coke calcining: Petroleum coke is calcined at a high temperature of 1250-1350°C without air to obtain calcined coke.

[0042] (2) Crushing, sieving, and grinding: crush the calcined coke, and then sieve it with a vibrating sieve to obtain calcined coke particles with a particle size of 6-3mm, 3-1mm and 1-0mm; The post-focus particles are ground into a fine powder with a particle size of less than 0.075mm by a mill, and the Brownian value of the fine powder is 3200.

[0043] (3) Ingredients, kneading, molding:

[0044] Weigh the calcined coke particles and fine powder with a particle size of 6-3mm, 3-1mm, and 1-0mm in proportion, add them to the kneading pot and mix them evenly. The various materials in the mixture are calculated by weight percentage:

[0045] particle size

6-3mm

3-1mm

1-0mm

Content%

24%

26%

50%

[0046] Among them, the particle size is less than 0.075mm, and the amount of material is 28%.

...

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Abstract

The invention discloses a production method of a low-air-permeability prebaked anode. The production process mainly comprises the processes of petroleum calcining, crushing, screening, grinding, mixing, coal tar pitch melting, kneading, forming, roasting and the like. A prebaked anode produced by the production method has the advantages that the air permeability is 1.2+/-0.4 npm, the index is stable, and the current situations that the air permeability is commonly higher and the index fluctuation is great are changed.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolysis, in particular to a production method of a prebaked anode with low air permeability. Background technique [0002] The prebaked anode is fixed on the upper part of the aluminum electrolytic cell and is the heart of the aluminum electrolytic cell; it undertakes the task of introducing direct current to the electrolytic cell and participating in electrochemical reactions. The quality and working condition of the prebaked anode also directly affect the main process technology, production cost and production stability of aluminum electrolysis production. [0003] Air permeability is an important quality index of prebaked anodes for aluminum electrolysis. For anodes with high air permeability, the consumption of prebaked anodes in the aluminum electrolytic cell process will increase significantly, and it may also cause slag drop during the use of the anode, making the electrolysis The co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/532C25C3/12
Inventor 梅其文王宗迎王波
Owner 山东平阴丰源炭素有限责任公司
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