design and analysis of ball mill inlet chute for roller press circuit in ... (Unidan Mill S) type FLS Ball mill which are used in the Cement industry for .... speed is 18 rpm, mill speed will be 15 rpm. .... 4.1 Mill Chute Area Calculation.

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Autor: Stuart de HaroGet Pricecalculation for speed of ball mill of 21 rpm. ball mill optimal rpm calculation In a ball mill of diameter 2000 mm, 100 mm dia steel balls are being used for grinding Presently, for the material being ground, the mill is run at 15 rpm At what speed will the mill have to be, Calculations: The critical speed of ball .

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Get PriceBall Mill Operating Speed Mechanical Operations Solved. Calculations: The critical speed of ball mill is given by, where R = radius of ball mill; r = radius of ball. For R = 1000 mm and r = 50 mm, n c = 30.7 rpm. But the mill is operated at a speed of 15 rpm. Therefore, the mill is operated at 100 x 15/30.7 = 48.86 % of critical speed.

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Get PriceExample: a mill measuring 11'0" diameter inside of new shell liners operates at 17.3 rpm. Critical speed is. C.S. = 76.63 / 11^0.5 = 23.1 rpm. Ball and SAG Mills are driven in practice at a speed corresponding to 60-81% of the critical speed, the choice of speed being influenced by economical considerations.

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