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Bond Mill Work Index

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To calculate bond rod-mill work indices, the four samples were screened and the particle size distributions plotted in fig.2.The plot was used to find f 80 of the samples for calculations.Fig.3, fig.4 show the grinding kinetics of pb, cu, fe, and mn ores in the bond rod-mill in different test-sieves.The slopes of all lines in the figures are equal to the k value of eq.