How is copper extracted from copper pyrites?

Concentration: Ore is concentrated by froth floatation process.
Roasting : Roasted ore mixed with coke and sand which is heated in blast furnace.
$\begin{array}{l}2{\mathrm{CuFeS}}_2+{\mathrm{O}}_2\to {\mathrm{Cu}}_2\mathrm{S}+2\mathrm{FeS}+{\mathrm{SO}}_2\uparrow \\ 2{\mathrm{Cu}}_2\mathrm{S}+3{\mathrm{O}}_2\to 2{\mathrm{Cu}}_2\mathrm{O}+2{\mathrm{SO}}_2\uparrow \\ 2\mathrm{FeS}+3{\mathrm{O}}_2\to 2\mathrm{FeO}+2{\mathrm{SO}}_2\uparrow \end{array}$
Smelting : Roasted Ore mixed with coke and sand which is heated in blast furnace.
$\begin{array}{l}2\mathrm{FeS}+3{\mathrm{O}}_2\to 2\mathrm{FeO}+2{\mathrm{SO}}_2\\ \mathrm{FeO}+{\mathrm{SiO}}_2\to {\mathrm{FeSiO}}_{3\text{ (slag) }}\end{array}$
Bessemerisation: Cu₂S and FeS mixture is transferred to bessemer converter. A blast of hot air and silica is blown through molten mate.
$\begin{array}{l}2{\mathrm{Cu}}_2\mathrm{S}+3{\mathrm{O}}_2\to 2{\mathrm{Cu}}_2\mathrm{O}+2{\mathrm{SO}}_2\uparrow \\ {\mathrm{Cu}}_2\mathrm{S}+2{\mathrm{Cu}}_2\mathrm{O}\to 6\mathrm{Cu}+{\mathrm{SO}}_2\uparrow \end{array}$
In this way blister appears on the surface. this contains 98% Cu and 2% mixture of Ag, Au etc.
Refining
Electrolytic refining
Anode : Blistered Cu
Cathode : pure Cu
Electrolyte : Aqueous solution of CuSO₄
On electrolysis :
At Anode : $\mathbf{Cu}\mathbf{\to }{\mathbf{Cu}}^{\mathbf{+}\mathbf{2}}\mathbf{+}\mathbf{2}{\mathbf{e}}^{\mathbf{-}}$
At Cathode : ${\mathbf{Cu}}^{\mathbf{+}\mathbf{2}}\mathbf{+}\mathbf{2}{\mathbf{e}}^{\mathbf{-}}\mathbf{\to }\mathbf{Cu}$