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various parts of a mining business in isolation. However, it is rare for companies to optimize all parts of their operation or portfolio simultaneously. In the past ten years some optimization specialists have focused on expanding the boundaries of integrated optimization, concentrating on issues faced by large and complex mining and processing operations. Burks and Whittle (2010) introduced these techniques at the 4th International Platinum Conference. Using advanced techniques, an integrated geological, mining, processing, transport, and product model can be constructed. This is manipulated mathematically to optimize the values of those variables that are considered negotiable. Utilizing this procedure, it is possible to develop long-term plans that maximize the value of large geological and technical plant asset portfolios. Significant improvements in net present value (NPV) of the business have been demonstrated in many cases. This methodology is very suitable for application to the PGM (platinum group metal) and related sectors of the mining industry. Whittle Consulting (an Australian company), assisted by its regional associates, recently completed an optimization study of a platinum project in South Africa (Burks et al., 2014, 2015). In this paper, the author discusses some of the optimization techniques and mechanisms applied, and briefly refers to some of the main conclusions and recommendations.

A simultaneous mining and mineral processing optimization and sustainability evaluation prepared during a platinum project prefeasibility study