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How is zinc extracted from its ore zinc ...

How is zinc extracted from its ore zinc sulphide or zinc carbonate ?

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The crude zinc sulphide ore is heated strongly in excess of air. Zinc sulphide is converted into zinc oxide. This process is known as roasting .
`underset("Zinc sulphide")(2ZnS_((s))) + 3O_(2(g)) to underset(" zinc oxide")( 2ZnO_((s))) + underset(" Sulphur dioxide ") (2SO_(2(g)))`
The crude zinc carbonate ore is heated strongly in limited supply of air. Zinc carbonte is converted into zinc oxide. This process is known as calcination .
` underset(" Zinc carbonate") (ZnCO_(3(s))) to underset("Zinc oxide")(ZnO_(s)) + (" Sulphur dioxide")(CO_(2(g)))`
The zinc oxide is reduced to zinc by using a reducing agent such s carbon
` underset(" Zinc oxide " ) (ZnO_((s))) + underset( "Carbon") C_((s)) to Zn_((s)) + underset("Carbon monoxide")(CO_((g)))`
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