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High-graphite carbon electrode and preparation method thereof

A carbon electrode, high graphite technology, applied in electric heating devices, electrical components, heating by discharge, etc., can solve the problems of high resistivity, high thermal expansion coefficient, low heat treatment temperature of electric calcined coal, etc. Wet corner, the effect of improving permeability

Active Publication Date: 2017-02-01
河北顺天电极有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the petroleum coke in this patent (generally considered as calcined petroleum coke in the industry, and its calcination temperature is 1200°C), the heat treatment temperature of electric calcined coal is low, and the resistivity and thermal expansion coefficient are relatively high.

Method used

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  • High-graphite carbon electrode and preparation method thereof

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Embodiment 1

[0030] A method for high graphitic carbon electrodes, comprising the steps of:

[0031] (1) Crushing, sieving, and grinding: respectively crushing and sieving graphite crushed and graphitized anthracite to obtain granular materials, wherein the particle size of graphitized anthracite is 1-4mm and 4-10mm, and the particle size of graphite crushed is 10mm ~16mm and 16mm~30mm; grind the graphitized petroleum coke to obtain a powder with a particle size of less than 1mm, and the purity of the particles less than 0.075mm is not less than 50%;

[0032] (2) Ingredients: 30 parts by weight of graphitized petroleum coke, 30 parts by weight of graphitized anthracite and 40 parts by weight of crushed graphite; the amount of powder less than 1mm accounts for 40% of the total mass of the solid mixture, and the amount of powder below 0.075mm accounts for 40% of the total mass of the solid mixture. 20% of the total mass of the mixture; 1-4mm, 4-10mm, and 10-16mm three particle sizes account ...

Embodiment 2

[0039] (1) Crushing, sieving, and grinding: respectively crushing and sieving graphite crushed and graphitized anthracite to obtain granular materials, wherein the particle size of graphitized anthracite is 1-4mm and 4-10mm, and the particle size of graphite crushed is 10mm ~16mm and 16mm~30mm; grind the graphitized petroleum coke to obtain a powder with a particle size of less than 1mm, and the purity of the particles less than 0.075mm is not less than 50%;

[0040] (2) Ingredients: 50 parts by weight of graphitized petroleum coke, 30 parts by weight of graphitized anthracite and 20 parts by weight of crushed graphite; the amount of powder less than 1mm accounts for 50% of the total mass of the solid mixture, and the amount of powder below 0.075mm accounts for 50% of the total mass of the solid mixture. 40% of the total mass of the mixture; 1-4mm, 4-10mm, and 10-16mm three particle sizes account for 30% of the total mass of the solid mixture, and 16mm-30mm large particles acco...

Embodiment 3

[0047] (1) Crushing, sieving, and grinding: respectively crushing and sieving graphite crushed and graphitized anthracite to obtain granular materials, wherein the particle size of graphitized anthracite is 1-4mm and 4-10mm, and the particle size of graphite crushed is 10mm ~16mm and 16mm~30mm; grind the graphitized petroleum coke to obtain a powder with a particle size of less than 1mm, and the purity of the particles less than 0.075mm is not less than 50%;

[0048] (2) Ingredients: 30 parts by weight of graphitized petroleum coke, 50 parts by weight of graphitized anthracite and 20 parts by weight of crushed graphite; the amount of powder less than 1mm accounts for 40% of the total mass of the solid mixture, and the amount of powder below 0.075mm accounts for 40% of the total mass of the solid mixture. 30% of the total mass of the mixture; 1-4mm, 4-10mm, and 10-16mm three particle sizes account for 55% of the total mass of the solid mixture, and 16mm-30mm large particles acco...

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Abstract

The invention relates to a high-graphite carbon electrode. The high-graphite carbon electrode comprises the following constituents of a solid mixture and liquid coal pitch, wherein the liquid coal pitch accounts for 19-21% of the total mass of the solid mixture and the liquid coal pitch, and the solid mixture comprises the following constituents based on percent by mass: 30-50% of graphitized petroleum coke, 30-50% of graphitized anthracite and 20-40% of graphite scrap. The invention also relates to a method for preparing the abovementioned carbon electrode. By the carbon electrode, the usage amount of the graphite scrap in the high-graphite carbon electrode can be reduced, the production cost is reduced, moreover, the resistivity and the thermal expansion coefficient of the high-graphite electrode can also be reduced, and the integral strength of the electrode is improved without adding an impurity element.

Description

technical field [0001] The invention relates to a preparation method of a carbon electrode, in particular to a high graphitic carbon electrode and a preparation method thereof. Background technique [0002] High graphite carbon electrode is an important conductive consumable material required for the submerged arc furnace to smelt metal silicon, yellow phosphorus, ferroalloy, and calcium carbide, and is the core component for the normal production of the submerged arc furnace. [0003] At present, in the production of high graphite electrodes for submerged arc furnaces, ordinary calcined petroleum coke (maximum calcination temperature 1150°C) and graphite crushed are used as the main raw materials. additions are continuously increasing. Due to the tight supply of high-quality graphite chips in the market, the sales price remains high, resulting in an increase in electrode production costs. [0004] The invention patent of application publication number CN102101664A disclos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B7/085C04B35/622C04B35/528
CPCC04B35/528C04B35/622C04B2235/77C04B2235/96C04B2235/9607H05B7/085
Inventor 王金铎杨海春陶国新李童刘云峰李鹏卢国成
Owner 河北顺天电极有限公司
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