... boiler,furnace metallurgy machinery,heat treatment The feature of the roller hearth furnace: (1)the transmission workpieces distribute along the rollers ... , and these rollers have different power sources. (2)The roller-hearth furnace can charging in batch or single for all ... reduce the speed of workpieces and the specific charging. (4)Roller-hearth furnace is widely used in steel, steel pipe, section ...