The technological innovation of electric arc furnace steelmaking technology in improving energy efficiency mainly includes the following aspects: Scrap preheating technology: By preheating scrap steel, the smelting cycle of the electric arc furnace can be shortened and energy consumption can be reduced. For example, new types of scrap preheating continuous feeding electric arc furnaces such as Constael electric arc furnace and SHARC electric arc furnace use high-temperature exhaust gas inside the furnace to preheat scrap steel, saving natural resources and improving thermal efficiency. Enhanced oxygen supply technology: By increasing the specific power input of the electric arc furnace, such as furnace wall oxygen supply technology and EBT oxygen supply technology, production efficiency can be improved and unit energy consumption can be reduced. Chemical energy enhancement and flue gas diversion preheating technology: Through chemical energy enhancement, such as injecting carbon powder, natural gas and other auxiliary fuels, as well as flue gas diversion preheating technology, energy utilization efficiency can be improved. Waste heat recovery technology: The high-temperature flue gas generated during the electric arc furnace smelting process can be recovered and utilized, such as converting flue gas waste heat into steam or electricity through a waste heat recovery system, thereby reducing energy consumption. Integrated control technology: Utilizing computer control systems and auxiliary decision-making operations to optimize energy layout and improve the operational efficiency of electric arc furnaces. Electrode intelligent adjustment technology: Through an intelligent electrode adjustment system, it improves energy utilization and reduces energy consumption.
foam slag technology: foam slag is formed in the smelting process of electric arc furnace, which can reduce the radiation of electric arc to furnace top and furnace wall, extend the life of furnace body, and improve productivity. Optimization of electrical operation in electric arc furnace steelmaking: By establishing a database and mathematical model of electrical operation characteristics of electric arc furnace transformers, it ensures energy output and stable operation with low consumption. Bundle oxygen supply technology: Through bundle jet technology, high-speed oxygen supply and decarbonization to the melt pool are achieved, improving the uniformity of heat and composition in the furnace and increasing oxygen utilization efficiency. Green arc furnace technology: such as CISDI GreenEAF technology developed by MCC Saidi, which combines scrap preheating with arc furnace environmental protection technology to achieve low-cost environmental production and improve energy efficiency. These technological innovations help improve the energy efficiency of electric arc furnace steelmaking, reduce production costs, and promote the development of the steel industry towards a green and low-carbon direction.