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An ore having 80% passing 10 mm is fed to a mill with a capacity of 12 t/h. The ground product has 80% passing o0,9 mm. It is required to grind 80% of the ore to a size of below 0,4 mm and to keep the same amount of energy required. Calculate the amount of ore that can be fed to the mill per hour to achieve this requirement

An ore having 80% passing 10 mm is fed to a mill with a capacity of 12 t/h. The ground product has 80% passing o0,9 mm. It is required to grind 80% of the ore to a size of below 0,4 mm and to keep the same amount of energy required. Calculate the amount of ore that can be fed to the mill per hour to achieve this requirement

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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An ore having 80% passing 10 mm is fed to a mill with a capacity of 12 t/h. The ground product has 80% passing o,9 mm. It is required to grind 80% of the ore to a size of below 0,4 mm and to keep the same amount of energy required. Calculate the amount of ore that can be fed to the mill per hour to achieve this requirement
Transcribed Image Text:An ore having 80% passing 10 mm is fed to a mill with a capacity of 12 t/h. The ground product has 80% passing o,9 mm. It is required to grind 80% of the ore to a size of below 0,4 mm and to keep the same amount of energy required. Calculate the amount of ore that can be fed to the mill per hour to achieve this requirement
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Hello,

in the second case it was said that 80% of Ore is grinded to a particle size of below 0.4mm. I would like to know why 0.9 mm was chosen as the feed size in the second case.

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