Industry News

- September 03, 2020

Graphite electrode introduction

Graphite electrode is made of petroleum coke and pitch coke as aggregate, coal tar pitch as binder, and it is made by raw material calcination, crushing and grinding, batching, kneading, molding, roasting, impregnation, graphitization and mechanical processing. Graphite conductive materials, called artificial graphite electrodes (graphite electrodes for short), are distinguished from natural graphite electrodes prepared from natural graphite.

Graphite electrodes are mainly used as conductive electrode materials for electric arc steelmaking furnaces.

What are the production characteristics of graphite electrodes?

(1) Long production cycle

(2) Higher energy consumption

(3) Many production processes

(4) A certain amount of dust and harmful gases are generated during the production process, and perfect ventilation and dust reduction and environmental protection measures to eliminate harmful gases need to be taken.

(5) Petroleum coke and coal tar as the carbon raw materials needed for production are by-products produced and processed by oil refining companies and coal chemical companies.

What are the main applications of graphite electrodes?

(1) Used in electric arc steelmaking furnace. Electric furnace steelmaking is a big user of graphite electrodes. Electric furnace steelmaking uses graphite electrodes to introduce current into the furnace,

The high temperature heat source generated by the arc between the electrode end and the charge is used for smelting.

(2) Used in submerged electric furnace. The submerged electric furnace is mainly used for the production of industrial silicon and yellow phosphorus. Its characteristic is that the lower part of the conductive electrode is buried in the charge.

An electric arc is formed in the material layer, and the heat energy emitted by the resistance of the charge itself is used to heat the charge, which requires a higher current density submerged electric furnace

Graphite electrodes are required.

(3) Used in resistance furnace. Graphitization furnaces for producing graphite products, melting furnaces for melting glass, and electric furnaces for producing silicon carbide are all resistance furnaces.

The material in the furnace is both a heating resistor and a heating object. Usually, a graphite electrode is embedded in the furnace head wall at the end of the resistance furnace for conductivity.

The graphite electrode here is not continuously consumed.

(4) Used to prepare heterogeneous graphite products. The blanks of graphite electrodes are also used for processing into various crucibles, molds, boats and heating elements and other heterogeneous graphite products.