Electric Arc Furnace Green Production Technology

Electric arc furnace steelmaking is a steelmaking method that uses the thermal effect of the arc to heat the charge for smelting. Electric energy is input into the electric arc steelmaking furnace through graphite electrodes, and steelmaking is performed using the arc generated between the electrode end and the charge as a heat source.
Electric arc furnace steelmaking uses scrap steel as the main raw material, and alloy, lime, carburizer, etc. as auxiliary raw materials. The basic process of electric arc furnace steelmaking includes slag removal, metal charging, power supply, melting, oxidation, reduction refining and tapping.

 

Green production of electric arc furnaces is mainly to reduce energy consumption, reduce pollutant emissions and improve resource recycling efficiency. In order to realize green production of electric arc furnaces, key technologies such as waste heat recovery, coke substitution, and scrap preheating have been developed.
Waste heat recovery: During the smelting process of the electric arc furnace, a large amount of high-temperature dust-containing flue gas will be produced. The heat taken away is about 11% of the total input energy of the electric arc furnace, and can reach up to 20%. Effective utilization of the energy in the flue gas can Save a lot of energy, thereby indirectly reducing CO2 emissions.
Coke substitution: In the traditional electric arc furnace smelting process, carbon is blended to meet the requirements of molten pool heating and stirring and foaming slag submerged arc. In the green production of electric arc furnaces, the consumption of non-renewable fossil energy such as coke should be reduced as much as possible.
Scrap steel preheating: Preheating scrap steel before adding it to the furnace can shorten the smelting cycle of the electric arc furnace and reduce energy consumption. It is an important energy-saving technology for electric arc furnace smelting.