Cylindrical medium proportioning method for fine grinding of collophanite

The invention relates to a cylindrical medium proportioning method for fine grinding of collophanite. The method comprises the steps of determining the mechanical property of ores, performing screen analysis on feedstock of a grinding machine, deducting the grinding grade which is not required, converting the composition of the feeding size to be ground, calculating the steel ball diameter required by ore grains in all grades with a Duan's sphere diameter semi-theoretical formula, determining the steel ball ratio of the grinding machine according to the ore grain yield of each group of the feedstock to be ground and the yield of the required steel balls in different diameters, and then determining the ratio of the cylindrical mediums according to the steel ball ratio. The method is utilized to process the collophanite, the content of below 0.074mm grade can be improved, and the content of 0.074-0.038mm, which is in an easily-choosing grade, is improved. The ore grinding products obtained by the method have reasonability in grain fineness distribution, and the grading index in the following grading operation can be effectively improved.