Experimental study on the phase equilibria between copper matte with silica-saturated iron silicate slags was conducted at 1300 °C and $$ P_{{{\text{SO}}_{ 2} }} $$ = 0.5 atm. The high-temperature isothermal equilibration in silica crucibles under controlled flowing CO-CO2-SO2-Ar was followed by quenching in an ice–water mixture and direct phase composition analyses by an electron probe X-ray microanalyzer. The equilibrium compositions for matte and slag, as well as the distribution coefficients, were displayed as a function of matte grade. The data set obtained at $$ P_{{{\text{SO}}_{ 2} }} $$ = 0.5 atm and the previous study at $$ P_{{{\text{SO}}_{ 2} }} $$ = 0.1 atm by the authors enabled an investigation on the impacts of $$ P_{{{\text{SO}}_{ 2} }} $$ as well as Al2O3 and CaO additions on phase equilibria in the multiphase copper matte smelting system. Thermodynamic calculations using MTDATA software were performed to compare the experimental results with modeling. The present results enrich the fundamental thermodynamic information for the matte/slag/tridymite/gas equilibria in the primary copper smelting process at high $$ P_{{{\text{SO}}_{ 2} }} $$ .

中文翻译：

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在 1300 °C 和 $$ P_{{{\text{SO}}_{ 2} }} $$ of 0.5 atm 下，铜锍和二氧化硅饱和的硅酸铁渣的平衡

在 1300 °C 和 $$ P_{{{\text{SO}}_{ 2} }} $$ = 0.5 atm 下进行了铜锍与二氧化硅饱和的硅酸铁渣之间的相平衡的实验研究。在控制流动的 CO-CO2-SO2-Ar 下，二氧化硅坩埚中的高温等温平衡之后，在冰水混合物中淬火，并通过电子探针 X 射线显微分析仪进行直接相组成分析。磨砂和炉渣的平衡成分以及分配系数显示为磨砂等级的函数。数据集在 $$ P_{{{\text{SO}}_{ 2} }} $$ = 0.5 atm 和之前的研究在 $$ P_{{{\text{SO}}_{ 2} } } $$ = 0。作者在 1 个大气压下研究了 $$ P_{{{\text{SO}}_{ 2} }} $$ 以及 Al2O3 和 CaO 添加对多相铜锍熔炼系统中相平衡的影响。使用 MTDATA 软件进行热力学计算，以将实验结果与建模进行比较。目前的结果丰富了高 $$ P_{{{\text{SO}}_{ 2} }} $$ 初级铜冶炼过程中冰铜/炉渣/鳞石英/气体平衡的基本热力学信息。