Mill lining is an essential requirement for milling operations, and it can account for up to 5% of the cost required to replace it, along with the labor for installation. However, the metal magnetic liner has been designed to reduce this cost and improve efficiency. It attaches the liner to the shell and retains ball chips and magnetic, making it an ideal option for secondary and regrind ball mills.
Rubber metal composite liners for AGSAG mills have become popular in recent years due to their ability to increase grinding efficiency gains associated with large diameter mills. PolyStl mill liners are the composite of a proprietary wear-resistant steel, which reduces the overall weight of the liner assembly, hence reducing loads on shells, heads, and bearings during ore processing.
To improve energy efficiency via an optimized design, it is important to consider the role of pulp lifters, cast liner weight, and mill shell. The installation of Cortez Gold is projected to result in over 90 days of pulp lifter installation. Mill #2 life had predominantly been ball mill limiting, so the ore required heavier cast liner weight on the mill shell, which impacted mill motor power draw.
In conclusion, the metal magnetic mill liner and rubber metal composite liners for AGSAG mills offer valuable solutions to improve efficiency and reduce costs in the mining industry. Optimization measures can also be taken, such as implementing pulp lifters, cast liner weight considerations, and mill shell design to further conserve energy and reduce costs.