ABSTRACT
The inherent conservatism of the mining industry is well understood, but the current hurdles encountered with financing new projects have complicated instances when new technologies such as high pressure grinding rolls (HPGR) are considered, especially if it translates into higher capital costs for the project. In this study, we do not suggest revolutionary changes, but instead incremental adjustments which can reduce circuit complexity and the corresponding capital costs, while maintaining the benefits of HPGR technology. Two non-conventional HPGR / ball mill circuits for high and low tonnage scenarios are presented and the capital costs, layout considerations and ancillary equipment requirements evaluated.
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