1. Given data
Diameter of cement mill D
Free height of cement mill H
Length of cement mill L
Calculated data
Radious of cement mill (r) D/2
Total volume of cement mill (V) πr2L
Height from surface to centre(r1) H−r
Angle produced by ball covered periphery(2Ө) 2cos−1
(
r1
𝑟
)
area produced by Ө(A) r2cos−1
(
r1
𝑟
)
base of triangle(b) 2√𝑟2 − 𝑟1
2
Area of triangle 𝑟1√𝑟2 − 𝑟1
2
Cross sectional area of ball covered mill r2cos−1
(
r1
𝑟
) − 𝑟1 √𝑟2 − 𝑟1
2
Volume of ball filled mill [r2cos−1
(
r1
𝑟
) − 𝑟1√𝑟2 − 𝑟1
2]×L
% of filling [r2 cos−1
(
r1
𝑟
) − 𝑟1√𝑟2 −𝑟1
2]×L
π 𝑟2L
×100%