Abstract
Publisher Summary A basic principle of many processes for extracting copper and nickel from sulfide ores is to overlay the molten ore or matte with a lime–silica–iron oxide slag and blow with air or oxygen. Some of the iron present in the ore oxidizes and as a result, partitions to the slag phase, while some of the sulfur is carried off as sulfur dioxide. This chapter describes a series of calculations for application of computer-assisted thermochemistry, which model the phase equilibria and partition of elements between the matte, slag, alloy, and gas phases at various stages of the pyrometallurgical process. The results agree well with practical experience and also provide an insight into the detailed phase relationships to be expected during such processes. The subsequent processing depends on the composition of the ore, including the amounts of impurities, some of which might be of value. The chapter illustrates the calculation procedures.
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