Introduction to the Use Technology of Graphite Electrodes

1. Types of graphite electrodes

Electric arc steelmaking furnaces are generally divided into

There are three types, namely ordinary power electric furnaces, high-power electric furnaces, and ultra-high power electric furnaces. Corresponding to the power level of electric furnace steelmaking, graphite electrodes are also divided into three types, namely ordinary power graphite electrodes (code RP level), high-power graphite electrodes (code HP level), and ultra-high power graphite electrodes (code UHP level). The nominal diameter of electrodes ranges from 75mm to 700mm. The physical and chemical properties of high-power and ultra-high power graphite electrodes are superior to those of ordinary power graphite electrodes, such as lower resistivity, higher volume density, higher mechanical strength, lower coefficient of linear expansion, and excellent antioxidant performance.

2. Selection of graphite electrodes for AC arc steelmaking furnaces

Distribution pole diameter of AC arc steelmaking furnace

Different types of graphite electrodes should be selected for electric furnaces with different powers, such as high-power electrodes for high-power electric furnaces. The selection of graphite electrode diameter varies for different power electric furnaces. It is generally believed that ordinary power electric furnaces choose RP electrodes with a diameter of 75-500mm; Select HP electrodes with a diameter greater than 300mm for high-power electric furnaces; Select UHP electrodes with a diameter greater than 400mm for ultra-high power electric furnaces.