Removal of Copper from the Sulphide Copper Smelting Waste Slag

Abstract:

The applicability of chloridizing roasting for removal of copper from the sulphide copper smelting waste slag of the ”Karabashmed'” copper-smelting plant is investigated. Calcium chloride CaCl₂ was used as chlorination agent. It is established that the chlorinating roasting of the initial slag presented by fayalite 2FeO∙SiO₂, hasn't led to noticeable removal of copper. Considerable degree of removal of copper (more than 90 %) has been reached as a result of the chlorinating of preliminary oxidized slag in which fayalite was oxidized to form Fe₂O₃ and SiO₂. Using a fractional factorial experiment 2^3–1, dependence of degree of copper removal from preliminary oxidized slag upon temperature of the chlorinating roasting, time of isothermal roasting period and content of CaCl₂ was established. It is found that increase of temperature and of CaCl₂ content leads to increase in degree of copper removal. The influence of time of isothermal roasting period in the studied interval (2–4 h) is statistically insignificant.

• Periodical: Materials Science Forum (Volume 989)
• Pages: 388-393
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.989.388
• Online since: May 2020
• Authors: Aleksander A. Lykasov, Grigoriy M. Ryss*, Dmitrij A. Ponomarev
• Keywords: Chloridizing Roasting, Fractional Factorial Experiment, Influence of Content of Chlorinator, Influence of Temperature, Oxidizing Roasting, Removal of Copper, Slag of Sulphide Copper Smelting

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