Extrusion converts a billet of steel right into a duration of uniform cross portion by forcing the billet to movement throughout the orifice of the die. Roasting and calcination are performed in differing types of furnaces; the most often utilized would be the reverberatory furnace. In the roasting course of https://metallurgicalprocesses02345.ttblogs.com/8992836/detailed-notes-on-metallurgical-processes