Auto reduction is employed in the metallurgy of

Why does auto-reduction process is not employed during the metallurgy of iron?

The electrolytic method of reduction is employed for the preparation of metals that :

Although thermodynamically feasible,in practice, magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium.Why?

Although thermodynamically feasible , in practices, magnesium metal are used for the reduction of almunia in the metallurgy of Al becauese.

The auto reduction process is not used in the metallurgy of