Semi-autogenous grinding (SAG) mill liner design and development

In traditional "HiLo" shell liner systems, alternate rows of worn "Lo" lifters are replaced with a new "Hi" at each liner change-out and are usually of the separate lifter and plate design (see Fig. 3). This system appears to work well in some smaller mills (say, around and less than 7.3 m or 24 ft), especially in cases where packing can be controlled to the level of the "Lo" lifters.