Oxidative removal of Cu from carbon-saturated iron via Ag phase into B2O3 flux
The oxidative removal of Cu from carbon-saturated iron via the Ag phase into B2O3 flux was attempted at 1523 K. The Cu content was reduced from 4 to below 0.2 mass％, and Cu in the molten iron could be removed into the B2O3 flux by the method proposed in this study. Furthermore, the Cu distribution ratio between the B2O3 flux and Ag, LCu(flux-Ag) (= mass％ Cu(in flux) / mass％ Cu(in Ag)) and the dependence of the activity coefficient of Cu2O in the B2O3 flux, γCu(in flux), on the oxygen partial pressure were measured. The greatest value of LCu(flux-Ag) was found to be 17 at 0.6 atm of oxygen partial pressure. Using this value, the distribution ratio of Cu between the B2O3 flux and carbon-saturated iron, LCu(flux-Fe) (= mass％ Cu(in flux) / mass％ Cu(in Fe-C))) is calculated to be 120 at 1523 K. A numerical calculation of mass transfer on the solutes in the Ag phase is performed, and the optimum condition on the removal of Cu by the method proposed in this work is discussed.
Tramp element Copper Iron scrap Recycle Oxidation
Hideki ONO Katsuhiro YAMAGUCHI
Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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
1-16
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）