Abstract

A combination of high-temperature experiments and thermodynamic modeling in the CaO–Cu₂O–FeO–Fe₂O₃–SiO₂ system provides the fundamental information necessary to design and improve processes such as WEEE recycling through black copper route, continuous converting of copper matte, copper dross smelting, slag cleaning, and valorization of copper slag. In the experiments, samples were equilibrated on a primary phase substrate or Fe metal foil, then rapidly quenched and studied using the Electron Probe X-ray Microanalysis. The FactSage software was used for calculations, combined with custom developed thermodynamic database. A systematic analysis is provided to select the fluxing strategy and increase the copper recovery in industrial processes. Slag liquidus and concentration of copper in slag were assessed as functions of oxygen partial pressure, temperature, Fe/SiO₂ in slag, and wt% CaO in slag.

Graphical Abstract

中文翻译：

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CaO-Cu 2 O-FeO-Fe 2 O 3 -SiO 2系统在新型铜基工艺中的实验研究和热力学计算

摘要

CaO–Cu ₂ O–FeO–Fe ₂ O ₃ –SiO _2中高温实验和热力学模型的组合该系统提供了设计和改进流程的必要基本信息，例如通过黑铜路线进行WEEE回收，铜哑光的连续转化，铜渣冶炼，炉渣清洁和铜炉渣的增值。在实验中，将样品平衡在原相基材或Fe金属箔上，然后快速淬灭，并使用电子探针X射线微分析法进行研究。FactSage软件与定制开发的热力学数据库结合在一起进行计算。提供了系统的分析，以选择助熔剂策略并提高工业过程中的铜回收率。根据氧分压，温度，炉渣中的Fe / SiO ₂和炉渣中CaO的wt％来评估炉渣液相线和炉渣中铜的浓度。

图形概要