Semi-autogenous grinding (SAG) mill liner design . - 911 MetallurgistSAG mill liner development draws primarily on practical experience from SAG . the impact of shell liners on the grinding action and of grates and pulp lifters on.sag mill grates,SAG Mill Ball Size Evaluator | Evaluation Factors | Calculate .Sep 8, 2013 . The SAG Mill has a “small” circulation load of oversize given be the 3/8″ trommel screen and the 1/2″ x 1 1/4″ discharge grates. The load of.