1. What is the flux and fuel used in smelting??
2. Define roasting and calcinating ?
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Roasting is a pyrochemical process in which the ore is heated in the presence of oxygen or air is below its melting point. ... roastingis done in reverberatory furnace. Ex:-2ZnS+3O2 ----> 2ZnO+SO2.Calcination is also a pyrochemical process in which ore is heated in the absence of air.the is decomposed in this process
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