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Problem Table 1 gives information gathered from tests on the size reduction of coal in a ball mill. Assuming that the values of specific rates of breakage, Sj, are based on 25 revolutions of the mill at a particular speed, predict the product size distribution resulting from the feed material, details of which are given in Table 2 after 25 revolutions in the mill at that speed. Table 1. Interval (um) 300 – 212 212 – 150 150 – 106 106 – 75 75 – 53 53 – 37 37 - 0 Interval No. 1 3 4 7 Sj b(1, j) b(2, j) b(3, j) b(4, j) b(5, j) b(6, j) b(7, j) 0.5 0.45 0.42 0.4 0.38 0.25 0.25 0.24 0.29 0.27 0.19 0.33 0.3 0.12 0.2 0.45 0.6 0.4 0.1 0.16 0.25 0.3 0.1 0.08 0.12 0.25 1.0 Table 2. Feed Size Distribution Interval Fraction 1 2 3 4 6. 7 0.25 0.45 0.2 0.1 oloooo

Problem Table 1 gives information gathered from tests on the size reduction of coal in a ball mill. Assuming that the values of specific rates of breakage, Sj, are based on 25 revolutions of the mill at a particular speed, predict the product size distribution resulting from the feed material, details of which are given in Table 2 after 25 revolutions in the mill at that speed. Table 1. Interval (um) 300 – 212 212 – 150 150 – 106 106 – 75 75 – 53 53 – 37 37 - 0 Interval No. 1 3 4 7 Sj b(1, j) b(2, j) b(3, j) b(4, j) b(5, j) b(6, j) b(7, j) 0.5 0.45 0.42 0.4 0.38 0.25 0.25 0.24 0.29 0.27 0.19 0.33 0.3 0.12 0.2 0.45 0.6 0.4 0.1 0.16 0.25 0.3 0.1 0.08 0.12 0.25 1.0 Table 2. Feed Size Distribution Interval Fraction 1 2 3 4 6. 7 0.25 0.45 0.2 0.1 oloooo

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
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Problem Table 1 gives information gathered from tests on the size reduction of coal in a ball mill. Assuming that the values of specific rates of breakage, Sj, are based on 25 revolutions of the mill at a particular speed, predict the product size distribution resulting from the feed material, details of which are given in Table 2 after 25 revolutions in the mill at that speed. Table 1. Interval (um) 300 – 212 212 – 150 150 – 106 106 – 75 75 – 53 53 – 37 37 - 0 Interval No. 1 2 3 4 7 Sj b(1, j) b(2, j) b(3, j) b(4, j) b(5, j) b(6, j) b(7, j) 0.5 0.45 0.42 0.4 0.38 0.25 0.25 0.24 0.29 0.19 0.27 0.33 0.3 0.12 0.2 0.45 0.3 0.1 0.16 0.25 0.6 0.1 0.08 0.12 0.25 0.4 1.0 Table 2. Feed Size Distribution Interval Fraction 1 2 3 4 6. 7 0.25 0.45 0.2 0.1 olooa ololo
Transcribed Image Text:Problem Table 1 gives information gathered from tests on the size reduction of coal in a ball mill. Assuming that the values of specific rates of breakage, Sj, are based on 25 revolutions of the mill at a particular speed, predict the product size distribution resulting from the feed material, details of which are given in Table 2 after 25 revolutions in the mill at that speed. Table 1. Interval (um) 300 – 212 212 – 150 150 – 106 106 – 75 75 – 53 53 – 37 37 - 0 Interval No. 1 2 3 4 7 Sj b(1, j) b(2, j) b(3, j) b(4, j) b(5, j) b(6, j) b(7, j) 0.5 0.45 0.42 0.4 0.38 0.25 0.25 0.24 0.29 0.19 0.27 0.33 0.3 0.12 0.2 0.45 0.3 0.1 0.16 0.25 0.6 0.1 0.08 0.12 0.25 0.4 1.0 Table 2. Feed Size Distribution Interval Fraction 1 2 3 4 6. 7 0.25 0.45 0.2 0.1 olooa ololo
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