For overflow ball mills, the charge should not exceed 45% of the mill volume For grate discharge mills, the charge should occupy about 50% of the mill volume Bond developed a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge, He, and the radius of the mill, R, ie.

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Get PriceBut efficiency of ball milling depends upon many factors like Ball dia, PCA used, Rotational speed, type of charge For a ductile charge it should be better with 15:1

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Get Pricecalculate ball mill charge - aerialworx Ball Mill Loading Dry Milling Paul O Abbe The starting point for ball mill media and solids charging generally starts as follows media charge assuming void space between spherical balls nonspherical, irregularly shaped and mixedsize media will increase or decrease the free space x free space add to this another above the ball charge for total of

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Get Pricemm; -050/+040 mm and -040/+0315 mm) with the ball charge of different diameters (Table 1) The dry mill grinding has been conducted The volume of grinding samples was equal to the volume of the interspaces of balls and the interstitial gaps between the balls charge

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Get Price8322 Ball mills The ball mill is a tumbling mill that uses steel balls as the grinding media The length of the cylindrical shell is usually 1–15 times the shell diameter ( Figure 811) The feed can be dry, with less than 3% moisture to minimize ball coating, or slurry containing 20–40% water by weight

Get Price01-06-2018· Dry batch milling tests were performed in a laboratory scale ball mill measuring 302 by 282 cm The mill specifications are given in Table 1 A constant ball load of 20% was maintained in all the tests with a ratio of 05 for binary and 033 for trinary ball mix

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