Commercial ball sizes 10 – 150 mm number size and mass of each ball size depends on mill load and whether or not the media is being added as the initial charge for the initial chargin of a mill coghill and devaney 1937 defined the ball size as a function of the top size of the feed ie d †v 040 k ˆšf db ball size
Get PriceDischarging the output product the size of a mill is usually characterized by the sizes of the balls ranging from 10 to 150 mm in diameter 30 26 when grinding in a ball mill the
Get PriceGrind size for any process including ball mill circuits we can say that output equals input multiplied by efficiency output input x efficiency in a ball mill circuit the output can be defined as the production rate of fines of the circuit as for any output ball mill circuit output
Get PriceNov 01 2006 the fill level was generally 30 by volume and the mill speed was 75 of the critical speed required to centrifuge particles the charge consisted of rocks and balls with balls making up 486 by volume of the charge the ball size distribution used was 75–200 mm and the rock size distribution was 25–100
Get PricePdf this project is to design and fabricate the mini ball mill that can grind the solid state of various type of materials into nanopowder and pt luckie the effect of ball size on mill
Get PricePlace in ball pebble or rod mills the efficiency of wet grinding can be higher than that for dry grinding but wear of equipment is also higher usually some form of separation follows size reduction the most common is simple screening in which the screen openings are selected to pass the desired size range and retain material that is too
Get PriceProduct size is estimated as a func tion of size and hardness of the mill feed and milling operating conditions napiermunn et al 1996 a more reali stic approach is the socalled population
Get PriceRate at each screen size is calculated from a torquemill test as in the example that follows torque mill solids load during test 1125 kg 248 lb of ball mill feed sample from plant survey sample is reconstituted with water to be the same percent solids as the plant ball mill discharge mill speed 352 rpm 65 percent of critical
Get PriceRod millball mill circuits diagrams of mill circuits image 13582 rod mill operations designed to accept feed from a secondary crusher feed particle size 6 – 25 mm peripheral speed 85 146 mmin 280 – 480ftm in reduction ratio 2 – 20 depending on material typically r
Get PriceSep 01 2013 as the feed size is reduced further less of the 508 mm balls and more of the 254 mm balls are required for the maximum capacity attaining 100 of 254 mm balls for a feed size of 47 mm fig 6d the capacity difference between the best and the worst makeup ball
Get PriceThe design of a ball mill can vary significantly depending on the size the equipment used to load the starting material feeders and the system for discharging the output product the size of a mill is usually characterized by the ratio length to diameter and this ratio most frequently varies from 05
Get Price• empty heights of both the chambers measured to calculate the ball charge filling and estimate the power residue of mill output on 90 1280 residue of separator reject on 90 3220 • high variations in the mill feed size on 25 mm sieve observed which shall result in variation in the mill
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