Manufacture
	MACHINIING
Selected petroleum cokes are used as the basic material for graphite electrode production. These are crushed, milled and sized by screening .The coke is blended in a mere together with carbonizable binders to form a plastic mass, which is then extruded into cylinders known as “green” electrodes.
These “green” electrodes are baked at approximately 1000°C in an inert atmosphere to carbonize the binder. This heat treatment lasts about three weeks. For various reasons, especially because of their high electrical resistance, the carbon electrodes are unsuitable for use in arc furnaces; so they are graphotype by heat treatment at approximately 2800°C in electric resistance furnaces, This brings about an improvement in the crystalline order, with a resultant increase in both thermal and electrical conductivity.
Diameter and length of Nipples are machined as per IEC/NEMA standard or according to buyer’s requirement.