Feb 13, 2017· Ball Mill Grinding P80 Size The mesh of grinding usually lies between 48 and 200 mesh On account of their size in relation to that of the bubbles, particles larger than 48 mesh generally have too great a tendency to drop out of the froth and escape in the tailing, while the lower limit is determined by the fact that grinding finer than 200Capacity 195t/h Input size <25mm Ball mill is a type of grinder machine which uses steel ball as grinding medium, can crush and grind the materials to 35 mesh or finer, adopted in open or close circuit The feed materials can be dry or wet, they are broken by the force of impact and attrition that created by the different sized ballsBall Mill Eastman Rock CrusherJan 31, 2015· More balls with small size results in fine powder As a thumb rule powder to be milled should be taken as 25% of total ball weight If the quantity of charge is very less then milling balls willHow can one select ball size in ball milling and how much

rate 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 speed)closing screen for the ball mill test one (standard square root of 2 series) mesh size coarser than the plant ball mill circuit P80 If between standard mesh sizes, the finer of the chose two Results of Bond ball mill tests conducted with closing screensGMSG GUIDELINE: DETERMINING THE BONDJun 01, 2018· For this coarser feed the 50 + 20+10 mm ball diameter mix breaks the material at a faster rate compared to the other ball matches The availability of a ball size for a particular feed size ensures breakage occurs at a faster rate The 10 mm ball size is unable to nip the large particle size hence the breakage rate is slowerEffect of ball and feed particle size distribution on the

Meanwhile, the results indicate that the treatment effect of wet milling is better than that of dry milling The optimum parameters for the milling process were ball speed of 350 r/min, solid/liquid ratio of 1:10, raw material particle size with 05 mm, and number of balls of 20 (steel ball, Φ = 10 mm), grinding for 30 min9 The feed size of a ball mill ranges from a) 50 mm b) 100 mm c) 200 mm d) 300 mm Answer: a Clarification: The feed size of a ball mill ranges from 50 mm, while the product size ranges from 100 to 200 mesh screen 10 As the rate of feed increases, the size reduction a) Increases b) Remains constant c) Equals d) Decreases Answer: d250+ TOP MCQs on Size Reduction Equipments and Answersthese purposes Choose a closing screen for the ball mill test that is one (standard square root of 2 series) mesh size coarser than the plant ball mill circuit P80 If choosing between two standard mesh sizes, choose the finer one Bond EfficiencyGMGICEv1r04 Determining the