“We knew that we needed a steel lining. But because it is so heavy, we didn’t want to use it for the whole lining. Metso then came up with a hybrid concept by combining several materials such as steel, Poly-Met, rubber and ceramics to keep the weight down because excessive weight burns and consumes your mill power for no real gain. Less weight protects your bearings and your driveline. It also allows you to get higher throughput without adding extra mill weight,” says Jason Ives, Senior Maintenance/Mill Advisor at B2Gold Masbate.
By combining different materials, the individual liner components could be positioned in high, medium and low impact grinding zones. It enabled the use of high-profile heavy-duty steel lifter bars in the high wear zones and prevented overloading trunnion bearing capacity. Metso’s capability in supplying a unique mill lining design with several materials, a well-defined optimization plan and a regular presence on site also made the choice of supplier much easier to make. In addition, by rolling all these elements into a Metso Life Cycle Services (LCS) contract, it made the decision easier for the mine to proceed with the project.