Na2CO3-Na2O-SiO2系融体と溶銅間のAs, Sbの分配平衡
ソーダ系スラグと溶銅間の平衡 (第3報)
1986 年 102 巻 1181 号 p. 415-422
詳細
1986 年 102 巻 1181 号 p. 415-422
Distribution ratios of As and Sb between the melts of Na2CO3-Na2O-SiO2 and metallic copper were measured at 1250°C. The results are as follows:
1) Distributions of As and Sb between sodium carbonate salt or Cu2O-base slag and metallic copper were determined under coexistence of these three melts.
2) Distributions of As and Sb between sodium silicate slag or Cu2O-base slagand metallic copper were determined under coexistence of these three melts.
3) Dependence of distribution ratios on soda-ratio and oxygen partial pressure was determined. The pentavalent oxide of As is predominant species in basic slags at high oxygen partial pressure. It is easy to eliminate As rather than Sb from crude copper by use of basic slag.
4) Distribution ratios of As, Sb and Cu at po2=10-8 atm increasewith Na2X and reach the maximum values at 0.7 sodaradio. Above 0.7 soda-ratiothe distribution ratios decrease with increase in Na2X (X=O, CO3) dueto the existence of carbonate.
