Hi experts,

I want to design a ball charge for a mono-chamber raw mill in a white cement plant and wanted to know your opinion about it.

The raw material is pre-ground by to a hammer crusher and after separation by a third generation separator the course material is fed to the mono-chamber raw mill.

 The technical data of the mill is as follows:

Mill diameter: 3.2 m

Mill Length:  6.37 m

Effective Mill diameter:  3 m (the mill liners are 95 mm)

Effective Mill Length:  6 m

Liner: Lifting plates

Mill Speed:  17 rpm

Mill Feed Residue Analysis:

mm

Ave.

12.7

0.4

9.5

1.0

8.0

1.9

6.4

4.3

4.8

8.5

2.4

20.3

1.2

32.5

0.8

41.7

0.6

52.6

0.2

70.8

0.1

88.5

 

What is the maximum ball size required? What is the ball charge design?

I appreciate any help you can provide me.

Best regards;

FJ