Improvement of Function and Utilization of Steelmaking Slag
Steelmaking slag is one of the main by-products of steelmaking process, and it has to be efficiently utilized. In Japan, approximately 10 million tons of converter slag is generated annually and most of them are recycled for various purposes. Nevertheless, about 1 ％ of generated slag is dumped without any utilization. Since the demand of steelmaking slag as construction material is expected to decrease, the stock of steelmaking slag is expected to increase. Two schemes should be considered to solve the issue of steelmaking slag utilization, first is to decrease volume of slag generation and second is to find the new future utilization of steelmaking slag in other fields by developing or adding new functions of steelmaking slag. To decrease the volume of slag generation, it is required to increase the utilization efficiency of solid CaO remaining in the slag to reduce the amount of slag. In Japan, the utilization of solid phase during refining processes, so called multi-phase flux has been developed and the condensation behavior of P2O5 into the solid phase during CaO dissolution into FeO-CaO-SiO2-P2O5 slag has been intensively studied. From the view point of innovative utilization of steelmaking slag, the improvement and rehabilitation of coastal environment in Japan by steelmaking slag have been proposed. The mixture of steelmaking slag and soil is one of the candidate materials for the recovery of coastal environment. Ferrous ion contained in the slag dissolves from steelmaking slag into seawater and plays an important role in promoting the growth of various seaweeds.
slag ironmaking steelmaking hot metal pretreatment refining utilization multi-phase flux marine environment dissolution
Hiroyuki MATSUURA Xiaojun HU Fumitaka TSUKIHASHI
Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of To Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of To
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
1-12
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）