Give chemical equation involved in the self reduction method for the extraction of copper
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The molten matte is further oxidized in air when the remaining FeS is mainly oxidized. More silica is added which forms more slag with the iron oxide. After removing the slag, the copper sulphide is partly oxidized by air to Cu2 O and this Cu2 O then combines with the remaining Cu2 S producing copper.
2Cu2 S + 3O2 → 2Cu2 O + 2SO2
2Cu2 O + Cu2 S → 6Cu + SO2
As the sulphur dioxide leaves the metal during cooling, the crude copper develops blisters and is known as 'blister copper'.
The molten matte is further oxidized in air when the remaining FeS is mainly oxidized. More silica is added which forms more slag with the iron oxide. After removing the slag, the copper sulphide is partly oxidized by air to Cu2 O and this Cu2 O then combines with the remaining Cu2 S producing copper.
2Cu2 S + 3O2 → 2Cu2 O + 2SO2
2Cu2 O + Cu2 S → 6Cu + SO2
As the sulphur dioxide leaves the metal during cooling, the crude copper develops blisters and is known as 'blister copper'.
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