Metallurgical Engineering > GATE 2020 > Ball Mill
For effective communition in a ball mill, it is desired that the balls travelling along the mill wall leave the wall at point C and travel freely in air along the path CDA, as shown in the figure. If ∠BOC is 120°, the rotational speed of the mill is _______ rpm (rounded off to one decimal place) by performing suitable force balance at point C.
Assume:
1. There is no slip between the ball and mill wall.
2. O is the rotational axis of the mill and OB is parallel to the vector g.
3. Inner diameter of ball mill is 3.26 m.
4. Acceleration due to gravity g is 9.8 m⋅s⁻².
Assume:
1. There is no slip between the ball and mill wall.
2. O is the rotational axis of the mill and OB is parallel to the vector g.
3. Inner diameter of ball mill is 3.26 m.
4. Acceleration due to gravity g is 9.8 m⋅s⁻².
Correct : 16.7
Similar Questions
Mr. X speaks _________ Japanese _________ Chinese.
A sum of money is to be distributed among P, Q, R, and S in the
proportion 5 : 2 : 4 : 3, respectively.
If R gets ₹ 1000 more than S, what is the share of Q (...
A trapezium has vertices marked as P, Q, R and S (in that order anticlockwise).
The side PQ is parallel to side SR.
Further, it is given that, PQ = 11 cm, QR...
Total Unique Visitors
Loading......