Batu Hijau mill throughput optimisation: milling circuit configuration strategy based on ore characterisation


PT Newmont Nusa Tenggara – Batu Hijau site mine to mill program has been systematically improved and resulting in Geo-Metallurgical detailed ore characteristics is successfully being used for short and long term business planning and mill throughput predictions. Actual plant operating and ore characterization data is continuously correlated, and is subsequently used to identify milling circuit constraints. This further enables a robust milling circuit configuration strategy to be implemented based on forecasted ore blends from the mine.

This paper discusses the development of the Batu Hijau Milling Circuit Configuration Strategy, which incorporates mine ore scheduling, mill shutdown planning, SAG Mill discharge grate, trommel and pebble screen panel aperture selection. The overall objective is to control the transfer size within the milling circuit, optimize power used for breakage in all installed comminution equipment and maximize throughput rates for all ores of varying grade and hardness characteristics.

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