Roller screening - An important fact from a customer point is that the discharge of the pellets is screened. Because of the breakage in the induaration system simply from handling, a screen is required to remove anything 1/4” down. This material is normally recycled back to the balling area and sent through system again.roller pelletizing machine for iron ore,Iron Ore Pellets Screening Solutions - Metal 7The size distribution of iron ore pellets is among the most important quality parameters for the end users of those pellets, the steel mills. The tighter the . Replacement of existing roller screens by new state-of-the-art machines has proven a small investment to trigger important gains for pelletizing plants. Such gains are also.