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The element or compound naturally occurs in the earth crust known as minerals
These minerals contains a high percentage of metal and metals can be profitably extracted from it these are known as ore
Calcination is the process for extraction of carbonate ore and in this metal carbonate are heated in the absence of oxygen to convert in metal oxide
In roasting is the process for sulphide ore in which metal sulphides are heated in the presence of oxygen to convert in metal oxide
These minerals contains a high percentage of metal and metals can be profitably extracted from it these are known as ore
Calcination is the process for extraction of carbonate ore and in this metal carbonate are heated in the absence of oxygen to convert in metal oxide
In roasting is the process for sulphide ore in which metal sulphides are heated in the presence of oxygen to convert in metal oxide
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