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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: 12.5 OC 73.5: 4.6 O D.37.5: 6.4 OE. 40.0: 6.67

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: 12.5 OC 73.5: 4.6 O D.37.5: 6.4 OE. 40.0: 6.67

Introduction to Chemical Engineering Thermodynamics
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
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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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? O A. 100: 15 O B. 25.5: 12.5 OC 73.5: 4.6 O D. 37.5: 6.4 OE. 40.0; 6.67
Transcribed Image Text: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? O A. 100: 15 O B. 25.5: 12.5 OC 73.5: 4.6 O D. 37.5: 6.4 OE. 40.0; 6.67
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