Effect of Flux Addition Method on Hot Metal Desulfurization by Mechanical Stirring Process
The effects of three flux addition methods on hot metal desulfurization with mechanical stirring were investigated in a 70kg hot metal desulfurization test.The flux addition methods studied here were top addition on the bath surface in the first period of desulfurization(batch addition),continuous addition from the top,and powder blasting with nitrogen gas.The desulfurization rate when powder blasting is applied is larger than that of either continuous addition or batch addition.The particle diameters of aggregation slag obtained after desulfurization were 0.76mm(batch addition)and 0.38mm(powder blasting).Desulfurization behavior was analyzed assuming that the interfacial area between the flux and the hot metal is proportional to the estimated size of the aggregated slag.Based on this analysis,the effect of powder blasting on improvement of desulfurization efficiency was interpreted to be the combined result of a)promotion of flux dispersion and avoiding aggregation during flux addition and b)prevention of slag particle aggregation in the hot metal during stirring.
hot metal desulfurization mechanical stirring powder blasting
Yoshie NAKAI Yuta HINO Ikuhiro SUMI Naoki KIKUCHI Yu-ichi UCHIDA Yuji MIKI
Steel Research Laboratory,JFE Steel Corporation,1 Kokan-cho,Fukuyama,Hiroshima,Japan
国际会议
the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)
北京
英文
57-60
2015-05-12（万方平台首次上网日期，不代表论文的发表时间）