817 bias blast fragmentations toward the fine end irrespective of the Axb value. Figure 60 – Run-of-Mine PSD with Corresponding Axb in the JKTech Database Error! Reference source not found. compares actual mill throughput with throughput predicted by a Specific Comminution Energy model developed using five variables that have shown statistical significance with mill throughput: total milling power draw, feed size, final grind size, Axb, and Bond BMWi. At this gold mine in the Southeast Asia–Pacific region, both Axb and Bond BMWi were measured daily over a twelve-month period. The time-series trend and parity plot both demonstrate a strong correlation between measured mill throughput and model predictions. The JKDWT and SMC Test® form part of a broader methodology rather than serving as simple ore characterisation tests. In addition to correlating with blast fragmentation and SAG mill throughput, orespecific parameters obtained from these tests are applied in the specific comminution energy benchmarking methodology (Morrell, 2008) and in mathematical models used within the JKSimMet software to predict AG/SAG mill and crusher performance for plant design and optimisation purposes.
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