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WhatsApp: +86 18838072829the form of Equation (3). The Jar Mill test favoured by gives a table of results of E and measured size x for a progressive batch grinding test; these results can be fitted as demonstrated in Figure 4. A series of Bond ball mill work index tests run at different closing mesh sizes can be fitted in almost the same way.
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WhatsApp: +86 18838072829Figure Power variation with mill speed for different media shapes (J=15%).86 Figure Power variation with mill speed for different media shapes (J=20%).87 Figure Power variation with mill speed for different media shapes (J=25%).87 Figure Variation of mill power draw with mill filling, J (cylpebs media)...88
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WhatsApp: +86 18838072829The Bond ball mill work index is one of the most commonly used grindability tests in mining, ... The work index is used to calculate the energy requirement to grind rocks in the fine size range, below mm into the range of a few hundreds of micrometres. Heterogeneous ore types typically are sensitive to the product size of the test, and the ...
WhatsApp: +86 18838072829Description Symbol Formula Example No. 1 Arm of gravity * ( 1 4 * R2 ) Torque factor matrix TAN [ / R * (1 4*R ) ] [ 2*R * (1 4*R ) 1 2 Deff Centre Distance (from mill centre to media top layer), mts Deff Mill effective diameter, mts h/Deff, ratio of centre distance to mill effective diameter Target
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WhatsApp: +86 18838072829Such Specific Energy Consumption determines in turns the Capacity of the grinding section, by the expression : M = P/E where : M = Fresh Ore Throughput (not including Circulating Load), ton/hr. P = Net Mill Power Demand, kW. Bond's Work Index may be estimated directly from operational data (whenever available) from backcalculation of the first ...
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WhatsApp: +86 18838072829determined that the SAG mill and recycle crusher design would need to be flexible to cope with these fluctuations. This necessitated including use of both, a variable speed SAG mill drive, and the ability to handle variations in the pebble crusher feed rate. Monzonite Bond ball mill work indices (Wi) averaged /t, with a
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