There is hardly any industry where carbon is not used in the form or other, but it enjoys a special importance where its property as a carrier of electricity plays a vital role in addition to other properties specifically its inertness to attack by molten metal at elevated temp-eratures. Hence, in electric energy intensive metallurgi-cal industries like, aluminium smelter, pig iron by elec-tro smelting, calcium carbide, ferro-alloy industries etc., electrodes of various designs and sizes are used either in amorphous or graphitised form
