The sample for a rod mill grindability test should be no finer than 80% passing ″, and the sample for a ball mill grindability test should be no finer than 80% passing 6 mesh. REFERENCES FRED C. BOND— Special Engineer with AllisChalmers Mfg. Co. "Standard Grindability Tests Tabulated," Trans. AIME (1949) vol. 183, page 313, TP 2180 ...
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WhatsApp: +86 18838072829Example: A mill in closed circuit with a classifier receives 300 dry tons of crude ore per day, and the percentages of solid are respectively 25, 50, and 84% in the classifier overflow, feed to classifier, and sand, equivalent to L: S ratios of,, and Then the circulating load ratio equals ... d = cumulative percentage on any mesh ...
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WhatsApp: +86 18838072829The ball sizes were .62inch and the ore sizes plus 65 to plus 10mesh. The results for chert are shown in four series in table 27 and for dolomite in five series in table 28. The ore (feed) sizes are in quotation marks because they are only nominal; their meaning is set forth in the sizing analyses under "feed."
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WhatsApp: +86 18838072829But during the milling produces a better distribution of gold in the material. In most of the buying of gold ore sample for analysis was screened to 200 mesh. The gold particles retained on the mesh errors in the analysis called nugget effect in Spanish. The analysis of a gold ore must contain a screening at 200 mesh (74 microns).
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