The application of electric arc furnace steelmaking technology in environmental protection is mainly reflected in the following aspects: Scrap steel crushing and sorting technology: By crushing and sorting, the cleanliness of electric arc furnace steelmaking raw materials is ensured, and the resource utilization rate is improved, which is crucial for achieving clean and purified smelting. Scrap preheating technology: Various types of scrap preheating electric arc furnaces have been developed, such as double shell, vertical, and Consteel. These technologies preheat scrap steel by using high-temperature exhaust gas inside the furnace, saving natural resources and improving production efficiency. Dioxin treatment technology: In the process of electric arc furnace steelmaking, source suppression and synthetic suppression methods are used to reduce the generation and emission of dioxins, such as strict sorting of scrap steel through online detection and manual sorting, as well as temperature control and addition of catalysts/inhibitors inside the furnace. Waste heat recovery technology: During the electric arc furnace smelting process, a large amount of high-temperature dusty flue gas is generated. The heat in the flue gas is recovered through the waste heat recovery system and used for power generation or heating, significantly improving energy utilization efficiency. Chemical energy enhancement and flue gas diversion preheating technology: Through chemical energy enhancement and flue gas diversion preheating, the preheating efficiency of scrap steel is improved, while effectively suppressing the generation of dioxins.
Green electric arc furnace technology: CISDI GreenEAF technology developed by MCC Saidi combines scrap preheating with environmental protection technology of electric arc furnace to achieve low-cost and environmentally friendly production, significantly reducing dioxin and dust emissions. Intelligent electrode adjustment technology: adopting an intelligent electrode adjustment system to improve energy utilization, make arc combustion smoother, and reduce energy consumption. Online analysis technology for furnace gas: By monitoring the composition and temperature of furnace gas in real-time, dynamic input control of oxygen and gas is achieved, optimizing combustion efficiency, reducing energy consumption and environmental pollution. The application of these technologies not only improves the energy efficiency and product quality of electric arc furnace steelmaking, but also promotes the green development of the steel industry and the realization of circular economy.