Flash smelting process
AssigneeInco Limited
InventorsGrigori S. Victorovich, Carlos M. Diaz
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Abstract
A copper flash smelting process in which part of a sulfidic copper feed is roasted in the presence of a calcareous SO.sub.2 scavenger to produce a calcine containing calcium sulfate and an oxidic copper product, the calcine is mixed with additional feed and the mixture is flash smelted to provide a metallic product and a calcareous slag.
Claims7
A process for producing copper metal comprising roasting a first sulfidic copper material in the presence of a calcareous sulfur dioxide scavenger to produce an oxidic copper product and calcium sulfate and thereafter combusting a second sulfidic copper material with oxygen in a bounded space in the presence of said oxidic copper product and calcium sulfate to produce copper metal, a lime slag containing essentially all silica and iron charged to said bounded space and an off-gas rich in sulfur dioxide.
Dependencies are inferred from the claim text.