Abstract
Assessment of literature data, experimental study and thermodynamic modeling of the Pb-As and Cu-Pb-As systems are presented. These chemical systems are of importance for metallic lead refining at 330-500 °C (603-773 K), and for separation of copper from lead in complex polymetallic processes at 1000-1150 °C (1273-1423 K). Few studies are available for the solubility of solid copper arsenide in lead at low temperature. At high temperature, significant discrepancies between available experimentally measured limits of two-liquid miscibility gap exist in the Cu-Pb-As system. Experimental investigation of the present study aimed to fill the gaps and resolve the discrepancies. It consists of equilibration, quenching and electron probe microanalysis. Thermodynamic modeling helped to analyze the results and provided a database of model parameters. Present study is a part of a larger research program aimed at characterization of phase equilibria, heat balance and distribution of elements during complex copper and lead smelting, refining and recycling.
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Acknowledgments
The authors would like to acknowledge the financial and technical support for this research from the consortium of lead producers: Aurubis, Kazzinc Glencore, Umicore, Nystar, Peñoles and Boliden through Australian Research Council Linkage program LP180100028. The authors acknowledge the facilities, the scientific and technical assistance of the Australian Microscopy & Microanalysis Research Facility at the Centre for Microscopy and Microanalysis, The University of Queensland. The authors value greatly the scientific discussions with Prof. P.C. Hayes.
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Shishin, D., Chen, J., Hidayat, T. et al. Thermodynamic Modeling of the Pb-As and Cu-Pb-As Systems Supported by Experimental Study. J. Phase Equilib. Diffus. 40, 758–767 (2019). https://doi.org/10.1007/s11669-019-00764-6
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DOI: https://doi.org/10.1007/s11669-019-00764-6