### (DOC) EXPERIMENT 2: BALL MILL GRINDABILITY TEST WAN

Figure 1: type of ball use Figure 2: the working principle of ball mill In this experiment, the Work Index is calculated from the following equation based on Bond,s third theory equation: ( ) Where = Work index (kWh/ton) = Test sieve aperture (micrometer) = Grindability (g/revolution) = 80% passing size of feed (micrometer) Figure 3: ball mill = 80% passing size of product (micrometer) Experimental Procedure 1

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