An AG/SAG mill was commissioned at the Brunswick mine concentrator in October 1998. This paper discusses the original shell top hat liner design for the bi-directional AG/SAG mill, observed liner wear, subsequent liner design modifications, and benefits, The original liners were steel chrome-moly steel Norsteel with rubber grates and rubber-lined pulp lifters. The design was based on experiences of other AG/SAG mills and recommendations by the liner supplier, Norcast. Liner design modifications were made in an iterative fashion after observing the wear rate profile of the liners; over ten liner sets were implemented. Shell liner design improvements were supported by a design of experiment approach in conjunction with DEM charge motion simulations. Design optimization took into account lining costs and impacts on operating performance. Liner measurements were performed on a monthly basis. Calculations of wear life were made and changes in the liner configuration undertaken as a result of the analyses to improve liner life and reduce scrap loss.
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