10. A 6,000 lb of a material goes through a crusher and grinder per hour in succession (on the same power drive). Screen analysis from the crusher shows a surface area of product of 500 ft² per lb. Screen analysis of the grinder product indicates a surface area of 4,200 ft² per lb. The Rittinger number of the material processed is 163 sq. in. per ft- Ibf. The efficiency of the crusher is estimated to be 25% while that of the grinder is 30%. The total power to be delivered to the equipment is a. 34.8 hp b. 35.4 hp c. 38.4 hp d. 40.4 hp
10. A 6,000 lb of a material goes through a crusher and grinder per hour in succession (on the same power drive). Screen analysis from the crusher shows a surface area of product of 500 ft² per lb. Screen analysis of the grinder product indicates a surface area of 4,200 ft² per lb. The Rittinger number of the material processed is 163 sq. in. per ft- Ibf. The efficiency of the crusher is estimated to be 25% while that of the grinder is 30%. The total power to be delivered to the equipment is a. 34.8 hp b. 35.4 hp c. 38.4 hp d. 40.4 hp
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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Transcribed Image Text:10. A 6,000 lb of a material goes through a crusher and grinder per hour in succession (on
the same power drive). Screen analysis from the crusher shows a surface area of
product of 500 ft² per lb. Screen analysis of the grinder product indicates a surface area
of 4,200 ft² per lb. The Rittinger number of the material processed is 163 sq. in. per ft-
Ibf. The efficiency of the crusher is estimated to be 25% while that of the grinder is
30%. The total power to be delivered to the equipment is
a. 34.8 hp
b. 35.4 hp
c. 38.4 hp
d. 40.4 hp
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