A feed of 3 inch spheres are crushed in a gyratory crusher. The column 1 in table below shows the sieve analysis of the product. 400 kW power is required to crush this material from which 10 kW is needed to operate the empty mill. If the clearance between the crushing head and the cone is reduced, the differential screen analysis changes to that given in column (2) in the Table. From (a) Rittinger's law and (b) Kick's law, calculate the power required for the second operation. The feed rate is 110 ton/h. Mesh size -4 +6 -6 +8 -8 +10 -10 +14 -14 +20 -20 +28 -28 +36 -36 +50 -50 +65 -65 +100 -150 Mesh size in um 4699 to 3327 3327 2362 1649 1112 833 580 417 295 147 First grind product 3.1 10.3 20 18.1 16.3 14 11.4 9.8 7.2 0.8 Second grind product 3.3 8.1 12.5 12.8 13.6 19 15.6 8.2 6.3 0.5
A feed of 3 inch spheres are crushed in a gyratory crusher. The column 1 in table below shows the sieve analysis of the product. 400 kW power is required to crush this material from which 10 kW is needed to operate the empty mill. If the clearance between the crushing head and the cone is reduced, the differential screen analysis changes to that given in column (2) in the Table. From (a) Rittinger's law and (b) Kick's law, calculate the power required for the second operation. The feed rate is 110 ton/h. Mesh size -4 +6 -6 +8 -8 +10 -10 +14 -14 +20 -20 +28 -28 +36 -36 +50 -50 +65 -65 +100 -150 Mesh size in um 4699 to 3327 3327 2362 1649 1112 833 580 417 295 147 First grind product 3.1 10.3 20 18.1 16.3 14 11.4 9.8 7.2 0.8 Second grind product 3.3 8.1 12.5 12.8 13.6 19 15.6 8.2 6.3 0.5
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Transcribed Image Text:A feed of 3 inch spheres are crushed in a gyratory crusher. The column 1 in table below shows the sieve
analysis of the product. 400 kW power is required to crush this material from which 10 kW is needed to
operate the empty mill. If the clearance between the crushing head and the cone is reduced, the differential
screen analysis changes to that given in column (2) in the Table. From (a) Rittinger's law and (b) Kick's law,
calculate the power required for the second operation. The feed rate is 110 ton/h.
Mesh size
-4 +6
-6 +8
-8 +10
-10 +14
-14 +20
-20 +28
-28 +36
-36 +50
-50 +65
-65 +100
-150
Mesh size in um
4699 to 3327
3327
2362
1649
1112
833
580
417
295
147
First grind product
3.1
10.3
20
18.1
16.3
14
11.4
9.8
7.2
0.8
Second grind product
3.3
8.1
12.5
12.8
13.6
19
15.6
8.2
6.3
0.5
me ar
a
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