The present situation and development in technology of iron and steel slag utilization with high-value addition
Along with the technology innovation and upgrading of iron and steel slag (ISS) processes and utilization technologies, the application of the equipment has been promoted, the comprehensive utilization way and the scale expends continuously. Good economic, social and environmental benefits have been achieved. The basic principle and process of steel slag heat pyrolytic pulverization technology are described in the paper. Steel slag is pulverized because of physical and chemical reactions in the cooling process. It can eliminate the volume instability caused by free-CaO and free-MgO. Dry twin-roll magnetic separation makes the TFe grade more than 85％, which can be directly recycled to converter steelmaking, and the TFe grade more than 60％ can be recycled as the sintering burden. The slag powder with specific surface area over 420m2/kg can equivalently substitute 10％-40％ cement to make different strength grades of concrete, so that have improved the performance of concrete. This paper puts forward that along with the progress of science and technology, 31 items of standards about comprehensive utilization of iron and steel slag have been drafted and revised in recent years in China, and have played an important role to promote the solid wastes zero emission for the iron and steel industry.
Blast furnace slag steel slag high-value utilization present situation and development
Chun WANG Jingling YANG Guilin ZHU Yidang HAO Yu ZHANG Shushan SUN
Central Research Institute of Building and Construction, Beijing, 100088, China
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-14
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）