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(das) Rösten, (der) Röstvorgang Roasting is a step in the primary production of metals from →ores. It is a step preceding the →smelting of the ore. It →oxidises compounds that could otherwise not be smelted in reducing conditions. This step is necessary for almost all sulfidic ores.
A process in which a metal ore (such as PbS or ZnS) is transformed into the corresponding oxide (PbO or ZnO) and SO2.
To cook with dry heat
(3) heating sulfide-bearing ores to release sulfur dioxide.
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