ABSTRACT

An experimental study has been carried out to determine the compositions of the slag/matte/metal/tridymite phases in equilibrium in the Cu-Fe-O-S-Si system at 1200℃. The measurements covered the full range of matte compositions from copper-free mattes to white metal, i.e. from 0 to 80 wt% of copper in matte. The research methodology involved high-temperature equilibration, quenching of the samples and accurate measurement of the phase compositions by electron probe X-ray microanalysis. The oxygen concentrations in mattes were directly measured using the EPMA. A comprehensive set of experimental equilibrium data has been obtained for coexisting matte, slag, Cu-Fe metal alloy and Fe-Cu metal alloy phases. It has been shown that solid iron-copper alloys were present at matte grades below 56 wt% Cu, while liquid copper-iron alloys were formed for matte grades higher than 56 wt% Cu. The experimental measurements have been compared with data reported in the literature and the trends calculated using the thermodynamic model descriptions of the system.

摘要

实验研究确定了1200℃Cu-Fe-OS-Si体系中渣/锍/金属/鳞石英相的平衡组成。测量涵盖了从无铜锍到白色金属的所有锍成分，即锍中铜的重量百分比为 0 至 80%。研究方法包括高温平衡、样品淬火和通过电子探针 X 射线微量分析准确测量相组成。使用 EPMA 直接测量哑光中的氧浓度。对于共存的锍、矿渣、Cu-Fe 金属合金和 Fe-Cu 金属合金相，获得了一套全面的实验平衡数据。已经表明，固体铁铜合金以低于 56 wt% Cu 的锍等级存在，而液态铜铁合金则形成了高于 56 wt% Cu 的哑光等级。实验测量已与文献报道的数据和使用系统的热力学模型描述计算的趋势进行了比较。