Abstract
A new method for simultaneously removing oxygen and sulfur from blister copper by adding sodium carbonate is described in this article. The main factors influencing the thermodynamics of the reaction, such as temperature, composition of the blister copper, and carbonate/sulfate salt ratio are presented with the help of phase diagrams. The results of preliminary experiments are very encouraging as copper containing 2–145 ppm sulfur and 1,100–3,700 ppm oxygen was produced without the use of a conventional hydrocarbon-reduction stage.
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