Chemistry A ball mill grinds a nickel sulphide ore from a feed size 80% passing size of 8 mm to a product 80% passing size of 200 microns. The ball mill discharge was reground in a Tower mill to increase liberation before re-cycling to the float circuit. The Tower mill has an installed power of 40 kW and produces a P80 of 30 microns from a F80 of 200 microns. What are the reduction ratios for the ball mill and tower mill, respectively? OA 100: 15 OB. 25.5. 125 OC 73.5: 46 OD 37.5: 64 OE 40.0: 6.67

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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Chemistry
A ball mill grinds a nickel sulphide ore from a feed size 80% passing size of 8 mm to a product 80% passing size of 200 microns. The
ball mill discharge was reground in a Tower mill to increase liberation before re-cycling to the float circuit. The Tower mill has an
installed power of 40 kW and produces a P80 of 30 microns from a F80 of 200 microns.
What are the reduction ratios for the ball mill and tower mill, respectively?
OA. 100: 15
O B. 25.5: 125
OC 73.5: 46
OD.37.5: 64
OE 40.0: 6.67
Transcribed Image Text:Chemistry A ball mill grinds a nickel sulphide ore from a feed size 80% passing size of 8 mm to a product 80% passing size of 200 microns. The ball mill discharge was reground in a Tower mill to increase liberation before re-cycling to the float circuit. The Tower mill has an installed power of 40 kW and produces a P80 of 30 microns from a F80 of 200 microns. What are the reduction ratios for the ball mill and tower mill, respectively? OA. 100: 15 O B. 25.5: 125 OC 73.5: 46 OD.37.5: 64 OE 40.0: 6.67
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