Ncert Exercises & Solutions

6.17 Why copper matte is put in silica lined converter?

Copper matte contains

C u_{2} S

and FeS. Copper matte is put in a silica-lined converter to remove the remaining FeO and FeS present in the matte as slag (

F e S i O_{3}

). Also, some silica is added to the silica-lined converter. Then, a hot air blast is blown. As a result, the remaining FeS and FeO are converted to iron silicate (

F e S i O_{3}

) and

C u_{2} S

is converted into metallic copper.

2 F e S + 3 O_{2} \to 2 F e O + 2 S O_{2}

F e O + S i O_{2} \to F e S i O_{3}

2 C u_{2} S + 3 O_{2} \to 2 C u_{2} O + 2 S O_{2}

2 C u_{2} O + C u_{2} S \to 6 C u + S O_{2}

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