Consumption of Graphite Electrodes in Electric Arc Furnaces
The consumption of graphite electrodes in electric arc furnace steelmaking runs through the entire smelting process, and its consumption is affected by many factors. Here we only analyze the operation of the smelting process.
1. Poor steel scrap quality or improper proportioning results in a poor slagging effect and prolongs the smelting time; The extension of smelting time is the direct factor leading to the increase of power consumption and electrode consumption and loss.
2. The electric furnace power supply equipment does not match the electrode specifications. The electric arc furnace power transmission is a high-current and low-voltage operation. Overload and overtime operation will cause the greatest loss and consumption of graphite electrodes.
3. In the oxidation period, the chemical energy is forced to be increased and the smelting intensity is increased. During the smelting, the amount of oxygen blowing is forced to be increased to achieve rapid melting and increase the furnace temperature. In high-temperature flame. When the electrode is in this kind of furnace environment, most of them have the serious phenomena of layering and surface oxidation.
4. The technicality of the configuration and operation of the electric furnace. The selection of power transmission curve and gear during operation, the control of arc starting and arc stabilization voltage and current, the coordinated use of the long, medium, and short arcs, the configuration and application of water cooling systems, etc., all affect the service life and consumption of electrodes played a key role.
5. The quality of graphite electrodes now the smelting and process of electric arc furnaces have more and more strict requirements on the anti-oxidation performance and thermal shock resistance of graphite electrodes, and the high consumption caused by quality fluctuation has attracted great attention from direct users. Therefore, the balance and stability of graphite electrode quality are the most important factors that determine the size of consumption.