Method for manufacturing carbon anode with shot coke-containing petroleum coke

A projectile coke and carbon anode technology, which is applied in the field of carbon anode production, can solve the problems of low yield, easy cracking of anode carbon blocks, poor asphalt adsorption performance, etc., and achieves the effect of maintaining sustainability and broadening the scope of resource selection.

Inactive Publication Date: 2010-04-28
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the shortcomings of the above-mentioned prior art, and to provide a method that can effectively solve the problem of poor adsorption of pitch and easy cracking of anode carbon blocks when producing anodes with raw materials containing shot coke. Method for making carbon anode from petroleum coke of shot coke

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Petroleum coke containing shot coke is calcined at a temperature of 1200°C. It is then ground into powder for making carbon anode powder. The rest of the process is to make carbon anodes for aluminum according to the conventional production process of carbon anodes. The prepared carbon anode product: bulk density 1.54g / cm 3 , compressive strength 36.3Mpa, resistivity 61.5μΩm, ​​true density 2.07g / cm 3 , thermal conductivity 3.04 / W.(m.K) -1 , CO 2 The reactivity residual rate is 92.2%, and the air reactivity residual rate is 98.3%.

Embodiment 2

[0015] Petroleum coke containing shot coke is calcined at a temperature of 1250°C. Separation of shot coke and ordinary coke in petroleum coke by winnowing. Shot coke is made into powder by a ball mill to replace part of ordinary coke powder to make carbon anode. The amount of shot coke powder added is 50% (accounting for the percentage of the total powder, and the rest is ordinary coke powder). The rest of the process is to make carbon anodes for aluminum according to the conventional production process of carbon anodes. The prepared carbon anode product: bulk density 1.54g / cm 3 , compressive strength 35.45Mpa, resistivity 58.7μΩm, true density 2.08g / cm 3 , thermal conductivity 3.29 / W.(m.K) -1 , CO 2 The reactivity residual rate is 86.95%, and the air reactivity residual rate is 85%.

Embodiment 3

[0017] Petroleum coke containing shot coke is calcined at a temperature of 1350°C. Separation of shot coke and ordinary coke in petroleum coke by flotation. Shot coke is made into powder with a ball mill to replace all ordinary coke powder to make carbon anodes, that is, the addition of shot coke powder is 100% (accounting for the percentage of the total powder). The rest of the process is to make carbon anodes for aluminum according to the conventional production process of carbon anodes. The prepared carbon anode product: bulk density 1.55g / cm 3 , compressive strength 36.75Mpa, resistivity 60.5μΩm, ​​true density 2.06g / cm 3 , thermal conductivity 3.09 / W.(m.K) -1 , CO 2 The reactivity residual rate is 89.6%, and the air reactivity residual rate is 72.4%.

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Abstract

The invention relates to a method for method for manufacturing carbon anode with shot coke-containing petroleum coke. The method is characterized of comprising the steps of: firstly calcining the shot coke-containing petroleum coke; pulverizing to prepare powder materials for manufacture the carbon anode; and kneading, forming and roasting to manufacture the aluminum used carbon anode. The method effectively solves the problems of low yield caused by bad asphalt adsorption property and easily broken carbon blocks when manufacturing the anode with coke-containing raw materials as the most grains of the shot coke are less and can not be effectively crushed. The method reasonably uses the shot coke-containing petroleum coke, widens the resources selection range of the carbon anode, and is good for maintaining the sustainability for manufacturing the carbon anodes.

Description

technical field [0001] The invention relates to a method for making a carbon anode by utilizing petroleum coke containing shot coke. Background technique [0002] With the application of large-scale prebaked electrolytic cell technology in the aluminum industry, the quality and performance requirements of the prebaked anode, the heart of the electrolytic cell, are also increasing. The use of high-quality raw materials that meet the grade requirements is a prerequisite for ensuring stable anode quality. [0003] In recent years, due to changes in crude oil and refining processes, the quality of petroleum coke used to manufacture anodes has been continuously reduced and the supply of high-quality petroleum coke has been increasingly tight. One of the prominent problems is that the proportion of shot coke in petroleum coke is increasing. high. Shot coke, also known as pellet coke and spherical coke, is a spherical petroleum coke particle, as big as a goose egg and as small as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/12
Inventor 罗英涛赵彬郭瑞敏
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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