Extraction of copper from copper pyrite CuFeS | vedclass

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(A) The extraction of copper from copper pyrite involves the following steps:$1$. Crushing and concentration of the ore by froth-flotation process.$2$

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$A, B, C$

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(A) The extraction of copper from copper pyrite involves the following steps:$1$. Crushing and concentration of the ore by froth-flotation process.$2$. Roasting of the concentrated ore to remove sulfur and convert iron into $FeO$,which is then removed as slag by adding silica $(SiO_2)$ as flux: $FeO + SiO_2 \rightarrow FeSiO_3$ (slag).$3$. The roasted ore is smelted in a reverberatory furnace to obtain copper matte $(Cu_2S + FeS)$.$4$. The matte is subjected to Bessemerization,where self-reduction occurs: $2Cu_2S + 3O_2 \rightarrow 2Cu_2O + 2SO_2$ and $2Cu_2O + Cu_2S \rightarrow 6Cu + SO_2$. This produces 'blister copper'.$5$. Refining of blister copper is typically done by electrolytic refining,not by carbon reduction.Therefore,steps $A, B,$ and $C$ are correct.

List-$I$	List-$II$
$(P) \ PbS + 2PbO \xrightarrow{\Delta} 3Pb + SO_2 \uparrow$	$(1) \ \text{Smelting}$
$(Q) \ PbS + \frac{3}{2}O_2 \xrightarrow{\Delta} PbO + SO_2 \uparrow$	$(2) \ \text{Self reduction}$
$(R) \ PbCO_3 \xrightarrow{\Delta} PbO + CO_2 \uparrow$	$(3) \ \text{Calcination}$
$(S) \ PbO + C \xrightarrow{\Delta} Pb + CO \uparrow$	$(4) \ \text{Roasting}$

Extraction of copper from copper pyrite $CuFeS_2$ involves:
$A$. Crushing followed by concentration of the ore by froth-flotation
$B$. Removal of iron as slag
$C$. Self-reduction step to produce 'blister copper' following evolution of $SO_2$
$D$. Refining of 'blister copper' by carbon reduction

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Extraction of copper from copper pyrite $CuFeS_2$ involves:$A$. Crushing followed by concentration of the ore by froth-flotation$B$. Removal of iron as slag$C$. Self-reduction step to produce 'blister copper' following evolution of $SO_2$$D$. Refining of 'blister copper' by carbon reduction