Fundamental experimental investigations have been conducted to study the effect of Al2O3 on the equilibria between the gas phase (CO-CO2-SO2-Ar) and slag-matte-tridymite phases in the Cu-Fe-O-S-Si-Al system at 1573 K (1300 degrees C) and P(SO2) = 0.25 atm. The experimental technique used is based on equilibration, rapid quenching and electron probe x-ray microanalysis. New experimental data have been obtained for the four-phase gas-slag-matte-tridymite equilibria system for a range of alumina concentrations up to 20.4 mass% in the slag phase as a function of matte grade, including the concentrations of dissolved sulphur and copper in slag, and Fe/SiO2 ratios in slag. The results obtained for 1573 K (1300 degrees C) are also used to analyse the effect of temperature on phase equilibria in the range of conditions investigated to that of reported for 1473 K (1200 degrees C) in the literature. The results obtained show that the concentrations of sulphur, copper and "FeO" in slag decrease with increase of Al2O3 concentration in slag while it has no detectable effect on concentration of sulphur in matte for a given matte grade. The new data provided in the present study are of direct relevance to the pyrometallurgical processing of copper and will be used as an input for optimisation of the FactSage thermodynamic database for the copper-containing, multi-component multi-phase system.

中文翻译：

---

在 1573 K (1300 °C) 和 P(SO2) = 0.25 atm 条件下，Cu-Fe-OS-Si-Al 体系中的气体-渣-磨砂-鳞石英平衡的实验研究

已经进行了基础实验研究以研究 Al2O3 对 1573 K 下 Cu-Fe-OS-Si-Al 系统中气相 (CO-CO2-SO2-Ar) 和渣-冰铜-鳞石英相之间的平衡的影响（1300 摄氏度）和 P(SO2) = 0.25 atm。所使用的实验技术基于平衡、快速淬火和电子探针 X 射线微量分析。获得了四相气-渣-冰铜-鳞石英平衡系统的新实验数据，矿渣相中氧化铝浓度高达 20.4 质量％，作为冰铜等级的函数，包括溶解硫和铜的浓度炉渣中的 Fe/SiO2 比。1573 K (1300 摄氏度) 获得的结果也用于分析温度对相平衡的影响，在研究的条件范围内，文献中报道的 1473 K (1200 摄氏度) 的条件范围内。获得的结果表明，渣中硫、铜和“FeO”的浓度随着渣中 Al2O3 浓度的增加而降低，而对于给定的冰铜等级，它对冰铜中硫的浓度没有可检测到的影响。本研究中提供的新数据与铜的火法冶金加工直接相关，并将用作优化含铜、多组分多相系统的 FactSage 热力学数据库的输入。