5-19. Three separation unit operations- trommel screen, magnet, and air classifier-are available for use in separating a feed made up of paper, ferrous, and glass. The splits (fraction of each material being rejected in each operation) are as given in Table P5-19. Table P5-19 Feed in tons/ Trommel Material hour Fraction Rejected Air Screen Magnet Classifier Paper 40 0.9 0.9 0.1 Ferrous 10 0.5 0.05 0.95 Glass 10 0.1 1.0 0.5 Using the array notation presented in the last section of this chapter, deter- mine the order and combination of any three of the unit operations if the objec- tive is to produce the highest recovery and purity of ferrous material. You can use one, two, or three unit operations

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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ANSWER QUESTION 5-19 – You need to try different orders of separation units. If you try only one order, then you need to justify why you didn’t try other orders of separation units. (I would highly recommend trying at least 3 combinations of order of separation units.)

5-19. Three separation unit operations-
trommel screen, magnet, and air
classifier-are available for use in
separating a feed made up of paper,
ferrous, and glass. The splits (fraction
of each material being rejected in each
operation) are as given in Table P5-19.
Table P5-19
Feed
in tons/ Trommel
Material
hour
Fraction Rejected
Air
Screen Magnet Classifier
Paper
Ferrous
Glass
0000
40
0.9
0.9
0.1
10
0.5
0.05
0.95
10
0.1
1.0
0.5
Using the array notation presented in
the last section of this chapter, deter-
mine the order and combination of any
three of the unit operations if the objec-
tive is to produce the highest recovery
and purity of ferrous material. You can
use one, two, or three unit operations.
Transcribed Image Text:5-19. Three separation unit operations- trommel screen, magnet, and air classifier-are available for use in separating a feed made up of paper, ferrous, and glass. The splits (fraction of each material being rejected in each operation) are as given in Table P5-19. Table P5-19 Feed in tons/ Trommel Material hour Fraction Rejected Air Screen Magnet Classifier Paper Ferrous Glass 0000 40 0.9 0.9 0.1 10 0.5 0.05 0.95 10 0.1 1.0 0.5 Using the array notation presented in the last section of this chapter, deter- mine the order and combination of any three of the unit operations if the objec- tive is to produce the highest recovery and purity of ferrous material. You can use one, two, or three unit operations.
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