Every comminution testwork program should include the appropriate ore characterisation tests to describe the variability of ore breakage properties, but there are several ways to interpret the data and define the design criteria for a project. The most simplistic way is to adopt an arbitrary value, such as the 80th percentile ore properties. This is typically used in pre-feasibility and feasibility studies to mitigate risks, but it does not account for the actual feed variability. Alternatively, there are geometallurgical approaches that consider the mine sequencing and the characteristics of different ore types. This paper describes a method that applies geometallurgy and multi-scenario simulation to minimize risk in comminution circuit design.

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