1.

(a) State the role of silica in the metallurgy of copper.(b) Differentiate between roasting and calcinations

Answer»

(a) As flux to remove FeO impurities in the form of slag FeSiO3

(b) Roasting :- Heating of ore in excess of air below its melting point 

Calcinations :- Heating of ore in limited supply of air below its melting point



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