Industrial applications of graphite electrodes
(1) For electric arc steelmaking furnace
Electric furnace steelmaking is a big user of graphite electrodes. The output of electric furnace steel in my country accounts for about 18% of crude steel output, and graphite electrodes for steelmaking account for 70% to 80% of the total consumption of graphite electrodes. Electric furnace steelmaking uses graphite electrodes to introduce current into the furnace, and uses the high temperature heat source generated by the arc between the electrode end and the charge for smelting.
(2) Used in submerged electric furnace
The submerged electric furnace is mainly used to produce industrial silicon and yellow phosphorus. Its characteristic is that the lower part of the conductive electrode is buried in the charge, forming an arc in the charge layer, and using the heat energy emitted by the resistance of the charge itself to heat the charge, which requires current The higher-density submerged electric furnace needs graphite electrodes. For example, it consumes about 100kg of graphite electrodes to produce 1t of silicon, and about 40kg of graphite electrodes are needed to produce 1t of yellow phosphorus.
(3) For resistance furnace
Graphitization furnaces for the production of graphite products, melting furnaces for melting glass, and electric furnaces for the production of silicon carbide are all resistance furnaces. The materials in the furnace are both heating resistors and objects to be heated. Generally, conductive graphite electrodes are embedded in the end of the resistance furnace. In the furnace head wall of the part, the graphite electrode used here is discontinuously consumed.
(4) Used to prepare special-shaped graphite products
The blanks of graphite electrodes are also used to process various crucibles, molds, boats and heating elements into special-shaped graphite products. For example, in the quartz glass industry, 10 tons of graphite electrode blanks are required to produce 1 ton of fused tubes; 100 kg of graphite electrode blanks are required to produce 1 ton of quartz bricks.