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Why copper ma...

Question

Why copper matte is put in silica lined converter?

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Solution

Copper matte mainly contains $C u_{2} S$ and FeS. For removing the gangue FeS, silica present in the lining of the Bessemer's converter acts as a flux and forms slag (iron silicate) on reaction with FeO.
$2 F e S G a n g u e + 3 O_{2} ⟶ 2 F e O + 2 S O_{2} F e O G a n g u e + S i O_{2} F l u x ⟶ F e S i O_{3} S l a g$

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Why copper matte is put in silica lined converter?

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