Preparation method of prebaked anode dry material

A prebaked anode and dry material technology, applied in grain processing, etc., can solve the problems of polluting the environment, excessive sulfur content, etc., and achieve the effects of high yield, reduced sulfur content, and improved efficiency

Pending Publication Date: 2020-11-27
百色皓海碳素有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the resistivity of the prebaked anode is too high, it will affect the conductivity and increase the power consumption of electrolytic production. The sulfur content of the prebaked anode is too high, which will produce a large amount of harmful gas and pollute the environment.

Method used

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  • Preparation method of prebaked anode dry material
  • Preparation method of prebaked anode dry material
  • Preparation method of prebaked anode dry material

Examples

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preparation example Construction

[0050] A method for preparing prebaked anode dry material, comprising:

[0051] Step 1, coarsely crushing the petroleum coke carbonaceous raw material in advance to a medium lump size of 50 mm to 70 mm, and then calcining to obtain calcined coke;

[0052] Step 2, crushing the obtained calcined coke to less than 70 mm to obtain petroleum coke particles, and sieving fine petroleum coke particles less than 3.15 mm and crude petroleum coke particles of 3.15 mm to 70 mm;

[0053] Step 3. Add a certain proportion of 3.15mm-70mm crude petroleum coke particles and petroleum coke carbonaceous raw materials below 50mm to the obtained fine petroleum coke particles below 3.15mm to form material A; wherein fine petroleum coke particles below 3.15mm account for 30% to 45% of the weight of material A;

[0054] Step 4, in addition, mixing 3.15mm-70mm crude petroleum coke particles with petroleum coke carbonaceous raw materials below 50mm to obtain material B;

[0055] Step 5: Melting the mo...

Embodiment 1

[0068] A method for preparing prebaked anode dry material, comprising:

[0069] Step 1. Crushing the petroleum coke carbonaceous raw material in advance to a medium size of 50 mm to 70 mm and then calcining to obtain calcined coke; the moisture content of the petroleum coke carbonaceous raw material is 1.2% to 3.0%; the volatile content of the petroleum coke carbonaceous raw material is divided into 8.0% to 9.8%; the ash content of the petroleum coke carbonaceous raw material is 0.30% to 0.50%; the sulfur content of the petroleum coke carbonaceous raw material is 0.70% to 2.3%.

[0070] Step 2, crushing the obtained calcined coke to less than 70 mm to obtain petroleum coke particles, and sieving fine petroleum coke particles less than 3.15 mm and crude petroleum coke particles of 3.15 mm to 70 mm;

[0071] Step 3. Add a certain proportion of 3.15mm-70mm crude petroleum coke particles and petroleum coke carbonaceous raw materials below 50mm to the obtained fine petroleum coke p...

Embodiment 2

[0078] The difference from Example 1 is that the above-mentioned crushing device is used to crush the petroleum coke carbonaceous raw material and calcined coke, so as to improve the crushing efficiency and reduce the traditional crushing process.

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Abstract

The invention discloses a preparation method of a prebaked anode dry material. The method comprises the steps of firstly coarse crushing a petroleum coke carbonaceous raw material to 50-70 mm, calcining to obtain calcined coke, then crushing to 70 mm or below, and sieving to obtain petroleum coke particles of 3.15 mm or below; adding a certain proportion of petroleum coke particles of 3.15-70 mm and carbonaceous raw materials of 50 mm or below into the particles of 3.15 mm or below to form a material A, and mixing the remaining petroleum coke particles of 3.15-70 mm and the remaining carbonaceous raw materials of 50 mm or below to obtain a material B; and adding liquid asphalt into the material A and the material B, mixing and pressing to obtain a material C and a material D, and separately calcining the material C and the material D. As the circumstances may require, all or part of a material obtained after the material C is calcined is used for preparing powder, calcined petroleum coke aggregate particles required in the anode dry material formula are prepared firstly after the material D is calcined, while the surplus part is used for preparing powder. Through technical transformation and production of the method, the prepared calcined coke product has lower resistivity and higher conductivity; trace elements of calcined coke are balanced and sulfur content is reduced; and the recovery rate of the calcined coke is improved, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of electrolytic aluminum production, more specifically, the invention relates to a preparation method of prebaked anode dry material. Background technique [0002] The prebaked anode is composed of aggregate and binder, and the binder plays the role of bonding the aggregate. During the working process, the prebaked anode reacts violently on the electrolytic cell, so the quality of the prebaked anode It has a great influence on the work of aluminum electrolysis. If the resistivity of the prebaked anode is too high, it will affect the electrical conductivity and increase the power consumption of electrolytic production. If the sulfur content of the prebaked anode is too high, a large amount of harmful gas will be generated and the environment will be polluted. [0003] Therefore, it is urgent to design a preparation method of prebaked anode dry material that can reduce resistivity and sulfur content. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/12B02C13/18B02C13/28B02C13/284B02C25/00
CPCC25C3/125B02C13/18B02C13/284B02C13/2804B02C25/00
Inventor 黄龙杨洪保黄三财徐赋曹建富巫桂萍刘胜园陈朝永罗军建曾福祥苏卫仕陈春元黄东莹
Owner 百色皓海碳素有限公司
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