Ultra high power graphite resistor rod with 600mm diameter and method for producing the same

Abstract

The present invention provides an ultra high power graphite resistor rod with 600mm diameter and a method for producing the same. The method utilizes domestic coal series acicular coke with low true density in main physicochemical standard, high heat expansion coefficient and sulphur content for producing the large-size ultra high power graphite resistor rod with 600mm diameter. Volumetric density, bending strength, elastic modulus, electric resistivity and heat expansion coefficient of the product reaches the international standard after detecting which can solve difficult problem that the domestic coal series acicular coke can not produce the large-size ultra high power graphite resistor rod with 600mm diameter because of low true density in main physicochemical standard, high heat expansion coefficient and sulphur content, and can realize localization for raw material acicular coke of the large-size ultra high power graphite resistor rod, simultaneity, also can solve problem that the acicular coke depends on importation in a long time and has high cost for restricting expanding yield and scale of the ultra high power graphite resistor rod in carbon industry. The product can reduce cost and improve economic performance.

Description

technical field [0001] The invention relates to a graphite electrode and a production method thereof, in particular to an ultra-high power graphite electrode with a diameter of 600 mm and a production method thereof. Background technique [0002] Usually, the main raw material for the production of ultra-high power graphite electrodes is needle coke, which is further divided into petroleum-based needle coke and coal-based needle coke. Compared with petroleum-based needle coke, coal-based needle coke has the advantages of low price and low thermal expansion coefficient; the disadvantage is large expansion and cracking. Due to large bulges, the decrease in bulk density of the product will lead to a decrease in product strength, and even cause the electrode to be scrapped due to damage during the manufacture of the electrode. [0003] It is very difficult to produce large-scale ultra-high power graphite electrodes using coal-based needle coke, mainly because the sulfur and nit...

AI Technical Summary

Problems solved by technology

Needle coke, the main raw material for the production of ultra-high-power graphite electrodes in my country, has long been dependent on imports, and the imported raw materials are expensive, resulting in high production costs and seriously restricting the expansion of the production capacity and quality of ultra-high-power graphite electrodes in my country's carbon industry.

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