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Your Position: Home - Minerals & Metallurgy - Can RP graphite electrodes be used in refining furnaces?

Can RP graphite electrodes be used in refining furnaces?

Graphite electrode is a conductive electrode used in the electric furnace in the process of steelmaking in a medium-sized electric arc furnace. After passing electricity between the electrode and the charge or between the electrode and the electrode, an arc is generated to heat and smelt the scrap steel, similar to the lightning effect. The main raw materials for graphite electrode production are petroleum coke and needle coke. Coal tar pitch is used as a binder and is made through calcination, kneading, pressing, roasting, impregnation, graphitization and machining. The graphite electrode is divided into a body and a joint, and the joint production process requires three immersion and four bakes. Because the graphite electrode is used to connect each end to the end, and the joint just plays the role of connection, the quality of the joint is higher. Graphite electrodes have low resistivity and can withstand high temperatures in electric arc furnaces, because the melting point of graphite is around 3900 °C, the melting point of scrap steel is 1700 °C, and the temperature in the electric arc furnace is above 3000 °C, so the use of graphite electrodes just meets the requirements. Graphite electrodes are mainly used for steelmaking, but also for smelting yellow phosphorus, industrial silicon, abrasives, etc.

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Graphite electrodes are divided into ordinary power, high power and ultra-high power graphite electrodes according to the power used.

The ordinary type of graphite electrode, RP, is the abbreviation of English (Regular Power), and RP graphite electrodes are generally not used in refining furnaces; the following will introduce the performance and uses of ordinary power graphite electrodes.

1. How is graphite electrode generally expressed?

Graphite electrode models are usually divided into RP ordinary power graphite electrodes, HP high-power graphite electrodes and UHP ultra-high-power graphite electrodes according to power. In addition, there are HD, SHP and other models between the three powers. Here are three commonly used ones. model. Graphite electrodes are made of petroleum coke and needle coke raw materials through calcination, extrusion, graphitization and machining, so the cost of graphite electrodes accounts for most of the raw materials, but the production process of graphite electrodes is complicated and the production cycle is long, so graphite electrodes The price fluctuates greatly, and the price varies from day to day.

2. Can ordinary power graphite electrodes be used in refining furnaces?

RP ordinary power graphite electrodes are commonly used in small electric arc furnaces to smelt crude steel, as well as silicon ore smelting in submerged arc furnaces, and yellow phosphorus smelting in phosphate ore furnaces. The use of graphite electrode types follows the principle of matching the power level with the power level of the electric arc furnace, that is, ordinary power graphite electrodes are suitable for ordinary power electric arc furnaces.

The refining furnace is an electric furnace for refining crude steel for impurity removal. The electrodes are mainly HP high-power graphite electrodes and UHP ultra-high-power graphite electrodes.

3. Technical indicators of ordinary power graphite electrode

Whether the power of the graphite electrode meets the standard directly affects the steelmaking output, and is prone to cracking, breaking and end falling off during use, so each type of graphite electrode must meet the standard physical and chemical indicators.

The technical indicators of ordinary power graphite electrodes include its resistivity, flexural strength, elastic modulus, bulk density and linear expansion coefficient as quality assessment indicators, and ash content as a reference indicator.


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