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Abstract

This study explores the thermodynamic feasibility of selectively oxidizing iron contained in chalcopyrite mineral while preventing the oxidation of copper sulphide, with the ultimate goal of enhancing the copper concentration in the sulphide concentrate. A redox reaction in the solid phases between chalcopyrite and copper (I) oxide was constructed and subjected to thermodynamic analysis. The research identifies a crucial temperature range of 498-598 K (225-325 °C) as the most favourable for the redox reaction. The equilibrium constants at the selected optimal temperatures, 1.152 for chalcopyrite and 1.137 for copper (I) oxide, indicate that the redox reaction adheres to the expected kinetic behaviour. The significance of these findings lies in the potential to selectively oxidize iron in chalcopyrite, allowing for its subsequent removal through magnetic separation. This strategic approach promises an increase in the copper percentage within the sulphide concentrate, thereby enhancing the efficiency and economic viability of copper extraction processes. The study not only provides valuable insights into the thermodynamics of the chalcopyrite-copper (I) oxide redox reaction but also establishes a practical temperature range for its optimal execution. The successful implementation of this approach holds considerable promise for the mining and metallurgical industries, offering a pathway to improve copper recovery processes and addressing the economic challenges associated with traditional extraction methods.

First Page

15

Last Page

20

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