Blister copper is extracted from copper pyrit | vedclass

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(A) In the metallurgy of copper,copper pyrites $(CuFeS_2)$ are roasted to remove sulfur as $SO_2$ and convert iron to $FeO$,which is removed as slag $

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self reduction

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(A) In the metallurgy of copper,copper pyrites $(CuFeS_2)$ are roasted to remove sulfur as $SO_2$ and convert iron to $FeO$,which is removed as slag $FeSiO_3$ by adding silica $(SiO_2)$.After this,the remaining copper matte contains $Cu_2S$ and some $FeS$.This matte is subjected to Bessemerization,where $Cu_2S$ reacts with the remaining $Cu_2O$ (formed by partial oxidation of $Cu_2S$) to produce metallic copper:$2Cu_2O + Cu_2S \rightarrow 6Cu + SO_2$.This process is known as self-reduction or auto-reduction.

Blister copper is extracted from copper pyrites. After removal of slag $FeSiO_3$,blister copper is obtained by

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