Basic Research on the high purity metal production using the reaction between various heterogeneous phases

对气-固、气-液、液-液、固-液之间的火法冶金反应以及液-液之间的湿法冶金反应和电化学反应进行了基础研究。用改进的库仑滴定法测定了液态合金中氧的活度系数，研究了液态合金中硫与氧的关系。用-lt；10~(-7)&t；atm，0.25%可使高纯铜中的硫含量降至1ppm以下。真空熔炼火焰适用于熔融的冰铜和液态金属。测定了杂质元素在Cu-lt、Cu2&Gt、S、Cu2&Gt、Cu2&Gt；O、炉渣-冰铜和金属熔剂之间的分配系数，考察了稀有金属和贵金属在水溶液和有机溶液中的萃取反应，研究了杂质元素在氯化物水溶液和熔融氯化物溶液中的电化学行为。

The followig basic researchs were carried out on the pyrometallurgical reactions between gas-solid, gas-liquid, liquid-liquid, solid-liquid phases, and hydrometallurgical and electrochomical reactions between liquid-liquid phases. These experimental results will be available as important knowledge for production of high purity metals.The activity coefficients of oxygen in liquid alloys were determined by the improbed coulometric titration method and the relation between sulfur and oxygen in liquid alloys were investigated.The content of sulfur in high purity copper was found to be able to decrease less than 1 ppm by means of <10^(-7)> atm with 0.25%.The fire refiuing by vacuum melting applied to molten matts and liquid metals. The distribution coefficients of impurity elements were determined between Cu- <Cu_2> S, Cu- <Cu_2> O, slag-matte and metal-flux.The extraction reactions of less-common metals and precious metals by using aqueous or organic solutions were investigated.The electrochemical behaviors of impurity elements in aqueous or moltn chloride solutions were investigated.