Explain the process of obtaining "blister copper" from "copper matte" with equations.

Explanation

Copper matte is charged into silica lined convertor Some silica is also added and hot air blast is blown to convert the remaining `Fes, FeO and Cu_2s//Cu_2O` to the metallic copper.
Following reaction takes place:
`2FeS + 3O_2 to 2FeO + 2SO_2`
`FeO + SiO_2 to FeSiO_3`
`2Cu_2S + 3O_2 to 2Cu_2O + 2SO_2`
`2Cu_2 O + Cu_2S to 6Cu + SO_2`
The solidified copper obtained has blistered appearance due to the evolution of `SO_2` and so it is called blister copper.