Points : Electric Arc Furnace Operation, Definition Definition The heat required in this process is generated by electric arcs struck between carbon electrodes and the metal bath. Usually, a charge of graded steel scrap is melted under an oxidizing basic slag to remove the phosphorus. The impure slag is removed by tilting the furnace. A second limey slag-is used to remove sulfur and to deoxidize the metal in the furnace. This results in a high degree of purification and high quality steel can be made, so long as gas absorption due to excessively high temperatures in avoided. This process is used extensively for making highly alloyed steel such as stainless, heat resisting and high-speed steels. Oxygen lancing is often used for removing carbon in the presence of chromium and enables scrap stainless steel to be used.The nitrogen content of steels made by the Bessemer and electric arc processes is about 0.01-0.25% compared with about 0.002-0.208% in open hearth steel.
Electric Arc Furnace Operation
Points : Electric Arc Furnace Operation, Definition Definition The heat required in this process is generated by electric arcs struck between carbon electrodes and the metal bath. Usually, a charge of graded steel scrap is melted under an oxidizing basic slag to remove the phosphorus. The impure slag is removed by tilting the furnace. A second limey slag-is used to remove sulfur and to deoxidize the metal in the furnace. This results in a high degree of purification and high quality steel can be made, so long as gas absorption due to excessively high temperatures in avoided. This process is used extensively for making highly alloyed steel such as stainless, heat resisting and high-speed steels. Oxygen lancing is often used for removing carbon in the presence of chromium and enables scrap stainless steel to be used.The nitrogen content of steels made by the Bessemer and electric arc processes is about 0.01-0.25% compared with about 0.002-0.208% in open hearth steel.
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