The Study of Grinding Phosphate Rock by the Contrast of Steel Balls and Iron Segments

The grinding process has been one of the most important part for mineral processing,combined with the basic principle of selective grinding and grinding medium application,a low grade phosphorite in Yunnan province which was grinded by the precise size and ratio of iron segments, and with the same specifications compared with low chrome steel balls under the same condition.The obtained results shown that iron segments could get a fine grinding with level(+0.10mm) 1.89 percentage points lower, pulverization level(-0.01mm) 0.07 percentage points lower,intermediate easy level(0.074～0.038mm) 9.29 percentage points higher,which further explains the iron segments has a better selective grinding effect,and could be used as a kind of ore fine grinding medium.