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In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to

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In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to

(1) separate CuO as CuSiO3 

(2) remove calcium as CaSiO3 

(3) decrease the temperature needed for roasting of Cu2S 

(4) remove FeO as FeSiO3

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(4) remove FeO as FeSiO3

The copper ore contains iron, it is mixed with silica before heating in reverberatory furnace. FeO slags off as FeSiO3.

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