21) Copper is obtained
o
by -
a) alumino thermite process
of self-oxidation.
- process.
6 self-reduction
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Copper is extracted from copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matte obtained from the blast furnace is charged into a silica lined converter. Some silica is also added and a hot air blast is thrown into the mixture to obtain blister copper which is purified by electrorefining.
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