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What are the difference between Roasting and Calcination? |
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Answer» Roasting: Heating of metal ore in presence of air is called roasting. In this step metal ore is converted to oxide. 2ZnS + 3O2 → 2ZnO + 2SO2 Calcination: Heating of metal ore in absence of air is called calcination. In this step volatile impurities escape and some of the ore decomposes. CaCO3 → CaO + CO2 ↑ |
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