ABSTRACT
The ancient metal age is replete with examples of the contributions of pyrometallurgy. It is still the major and primary means by which most of our metals are won, processed, and converted for our utility. Processing of chromite via the oxychlorination process appears to be a very interesting alternative to the conventionally used processes. The reaction is virtually irreversible and takes place even at very low concentrations of oxygen in the gaseous phase. In the oxidation process, a film of the trioxide forms on the molybdenite particles. The starting material for all pyro-processes of molybdenum is the molybdenite concentrate. The chapter deals with roasting and chlorination processes for treating the molybdenite concentrate. Almost all molybdenite concentrates are first subjected to roasting to yield technical grade molybdic oxide which forms the basic raw material for all commercially used products of molybdenum.
