Oxidative Removal of Cu from Carbon-saturated Iron via Ag Phase into B2O3 Flux
Oxidative Removal of Cu from Carbon-saturated Iron via Ag Phase into B2O3 Flux
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DOI：
10.2355/isijinternational.52.18
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发表时间：
2012-01
影响因子：
1.8
通讯作者：
Katsuhiro Yamaguchi;H. Ono
中科院分区：
文献类型：
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作者：
Katsuhiro Yamaguchi;H. Ono
在1523 K下，通过Ag相进入B2 O3熔剂，尝试从碳饱和的铁中氧化去除Cu。采用本研究提出的方法，可将铁水中的Cu含量从4质量%降低到0.2质量%以下，并可将铁水中的Cu去除到B2 O3熔剂中。此外，还测定了Cu在B2 O3助熔剂和Ag之间的分配比LCu（助熔剂-Ag）（= [mass % Cu]（in flux）/[mass% Cu]（in Ag））和Cu 2 O在B2 O3助熔剂中的活度系数γ Cu 2 O（in flux）随氧分压的变化。发现在0.6个大气压的氧分压下，LCu（助熔剂-Ag）的最大值为17。使用该值，计算出在1523 K时Cu在B2 O3熔剂和碳饱和铁之间的分配比为120。为了预测溶质元素在Ag相中的行为，基于Fick第二定律进行了传质的数值计算，并讨论了氧化去除Cu的最佳实施方法。
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 activity coefficients of Cu2O in the B2O3 flux, γCu2O(in flux), owing to 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 is calculated to be 120 at 1523 K. To predict the behavior of solute elements in the Ag phase, a numerical calculation of mass transfer based on Fick's second law is performed and the optimum execution method of oxidative removal of Cu is discussed.