Quantitative Analysis on Sulfidic and Oxidic Dissolutions of Copper in Matte Smelting Slag

为了估计铜在哑光冶炼渣中的硫化和氧化溶解，进行了以下平衡实验。试验结果和铜冶炼热平衡表明，在哑光炉中生产的哑光铜的最佳含铜量为70%。(1)在1200 ~ 1400℃范围内进行了FeO_X-CaO-SiO_2炉渣与铜液的平衡实验，确定了CuO_<0.5>的活度系数，由此计算出FeO_X-CaO-SiO_2炉渣中铜的溶解度。活度系数根据炉渣成分的不同在1 ~ 15之间变化。(2)铁饱和条件下渣-冰晶-铜金属的实验结果导致Cu-Fe-S-O冰晶中CuS_<0.5>的活度系数以及渣中硫含量与渣中CuS_<0.5>的活度系数之间的关系。(3)在SO_2浓度为10%的条件下，测定了铜在冰砂平衡渣中的溶解度。根据1、2和3.4的实验结果估计了铜的硫化和氧化溶解。计算了铜冶炼过程的热平衡。考虑到能耗和炉渣中铜的损失，亚光冶炼炉生产的亚光中铜的最佳含量为70%。

In order to estimate sulfidic and oxidic dissolution of copper in matte smelting slags, following equilibrium experiments have been performed. The experimental results and heat balance of copper smelting suggest that the optimum copper content in matte produced in matte smelting furnace is 70%.(1) The equilibrium experiments between FeO_X-CaO-SiO_2 slag and molten copper have been carried out from 1200 to 1400ﾟC to determine the activity coefficient of CuO_<0.5> Consequently, we can calculate the oxidic copper solubility in the FeO_X-CaO-SiO_2 slag from the experimental results. The activity coefficient varies from 1 to 15 depending on the slag composition.(2) The experimental results of the slag-matte-copper metal under iron saturation lead to the activity coefficient of CuS_<0.5> in the Cu-Fe-S-O matte and the relation between sulfur content in slag and the activity coefficient of CuS_<0.5> in slag.(3) The copper solubility in the slag equilibrated with matte have been measured under a corrent of 10% SO_2. The sulfidic and oxidic dissolutions of copper are estimated from the experimental results of 1,2 and 3.4. Heat balance of copper smelting has been calculated. The optimum copper content in matte produced in matte smelting furnace is 70% in view of energy consumption and copper loss in slag.