Na2O-Cu2O, SiO2-Cu2O系スラグと溶銅間の平衡
ソーダ系スラグと溶銅間の平衡 (第1報)
1986 年 102 巻 1179 号 p. 311-316
詳細
1986 年 102 巻 1179 号 p. 311-316
The equilibrium between molten copper and the alumina-saturated Na2O-Cu2O or SiO2-Cu2O slag was studied at 1250°C, and the distributions of As and Sb were also investigated. The results are as follows:
1) The activity of CuO0.5 in the basic slag of Na2O-Cu2O deviates negatively from the ideal solution. This behaviour is similar to the activity of CuO0.5 in the acidic P2O5-Cu2O slag.
2) The activity of CuO0.5 in the alumina-saturated SiO2-Cu2O slag deviates positively as in the iron oxide-base slag, such as FeOn-Na2O, FeOn-CaO and FeOn-SiO2 slags.
3) The distribution ratios of As and Sb between the slag and molten copper are not affected by addition of SiO2 to the Cu2O melt. In the case of Na2O, the distribution ratios of As and Sb largely increase with the content of Na2O in slag. Therefore Na2O is a good flux for the removal of As and Sb from the crude copper.
4) The distribution ratio of As is more strongly affected by slag basicity than that of Sb is.
