Make useful minerals in the ore monomer dissociation, is to use any mineral processing method to solve the key problems, first as a result, the flotation condition test generally begin with ball mill grinding fineness test. Based on the characteristics of mineral disseminated extent identification results, can preliminarily estimate the grinding fineness, but must be determined by the experiment.
Ball mill grinding fineness trials often, take more than three samples with different time (for example, 10 min, 12 min, 15 min, 20 min, 30 min), while keeping other test under the same grinding conditions, then carries on the flotation, compare the results. In parallel at the same time to take a few core sample, respectively with specified above several grinding, grinding time and grinding sieve analysis, find the grinding time and the relationship between ball mill grinding fineness. Sometimes also can choose the better one or two conditions, take one or two of the same time of grinding the core sample accordingly, sieve analysis.
Determine the grinding time and relationship between ball mill grinding fineness of particular way is: sampling after dry grinding, generally is 100 g, and in 200 to wet sieve sieve. Oversize product after drying, and then inspection on 200 sieve sieve, measured is less than 200 purpose of material before and after merger. Can be calculated accordingly - 200 mesh level of content in the grinding. Then the grinding time (min) as the abscissa, ball mill grinding fineness (- 200 mesh level of content, %) as the ordinate, plot of relationship.
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