Consumption of graphite electrodes

The consumption of graphite electrodes is mainly related to the quality of the electrode itself, but also related to the steelmaking operation and process.

(1) The electrode end is consumed. Its consumption includes the sublimation of graphite material caused by the high temperature of the arc and the loss of the chemical reaction between the electrode end and the molten steel and slag.

The electrode end consumption is also related to whether the electrode is inserted into the molten steel to increase.

(2) Oxidation loss on the outer surface of the electrode. In recent years, in order to increase the smelting rate of the electric furnace, the oxygen blowing operation has been adopted, which has led to an increase in the oxidation loss of the electrode. In general,

The oxidation loss on the outer surface of the electrode accounts for about 50% of the total electrode consumption.

(3) Loss of residual body of electrode or joint. If the electrode is used continuously, a small section of electrode or joint at the connection of the upper and lower electrodes is easy to fall and increase consumption.

(4) Loss of electrode breakage, surface peeling and falling block. These three types of electrode losses are collectively referred to as mechanical losses. The breakage and fall-off of the electrodes are caused by steel mills and graphite electrode manufacturers.

Identify the dispute point of the quality accident, because it may be due to the quality and processing of the graphite electrode, or it may be a problem in the steelmaking operation.