AMIT 135: Lesson 8 Rod Mills – Mining Mill .
Rod MillBall Mill Circuits Diagrams of mill circuits [image: (13582)] Rod Mill Operations . Designed to accept feed from a secondary crusher. Feed particle size = 6 – 25 mm. Peripheral speed = 85 146 m/min (280 – 480ft/m in) Reduction ratio = 2 – 20 depending on material. Typically R = 8. Rod Mill Charge: Typically 45% of internal volume; 35% – 65% range; Bed porosity typically 40% ...