NOUFERROUS METALLURGICAL EQUIPMENT

Steel slag is the main by-product in the steelmaking process, and the development of its treatment and utilization technology has received widespread attention. Given the importance of green and sustainable development in the steel industry, it is particularly important to find an efficient and clean comprehensive utilization technology for steel slag. Based on above, this paper reviews the principles, research progress, and application status of existing processes from three aspects: primary treatment, secondary treatment, and resource utilization of steel slag. It also looks forward to the difficulties, challenges, and prospects faced by current research in industrial production. In primary treatment, the fourth-generation high-efficiency pressurized tank-based thermal quenching technology and equipment for molten steel slag have been widely adopted by major steel companies both domestically and internationally, achieving a domestic market share of over 90% and a slag treatment rate of up to 99%. In secondary treatment, electromagnetic separation technology is employed, which doubles the recovery rate of slag iron content, compared to systems without a magnetic field. The paper aims to provide a reference for further in-depth research on steel slag treatment and resource utilization.