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UBC Theses and Dissertations

Use of a 60cm pilot plant for scale-up of semi-autogenous grinding mills Corrigan, Declan Brendan


Design Data for sizing full scale Autogenous or Semi-Autogenous mills is typically obtained from pilot plant tests in 1.5 to 2.0m diameter mills. These tests are expensive and time consuming. Attempts have been made to devise small-scale tests which would be faster, cost less, and require smaller samples. Some success has been achieved using a 45 cm diameter mill. A 60 cm wet continuous SAG circuit located in the Mining and Mineral Process Engineering Department of UBC, is being used to examine the correlation between full-scale and small-scale performance. To date testwork has been conducted on samples from four operating copper mines in B.C., and one gold property in Alaska. Equipment and test procedures are described. Data obtained to date are presented and analysed. It is concluded that the circuit can be of use in testing ores to determine SAG mill design parameters. However, additional data is required and experimentation with different circuit configurations should be attempted. The addition of a secondary ball mill to the circuit would be of benefit.

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