Determine the diameter of the big ball
It depends on the ball mill specification size, into the grain size of grinding material and grindability. A secondary ball diameter in general with multistage match ball shall prevail.
Such as a ball mill machine in multistage match ball of the ball diameter is 100 mm, with two level of the ball when it should choose a diameter of 90 mm steel ball.
Determine the diameter of the small ball
It depends on the size of the gap between ball which depends on the size of the diameter of the ball. Usually the small ball diameter is appropriate that 20-30%of small ball diameter values.
The ratio of large and small ball
In principle,this should guarantee the mixed pellets range does not affect the ball fill rates. Small ball weight is commonly two-thirds of big ones.
In multilevel of match ball
Steel ball impact force and impact frequency, control of material flow capacity requirements are based primarily on the average ball diameter is affected by a variety of specifications of the ball.
In two gradation of match ball
Steel ball impact force and impact frequency determined by the diameter of the big ball.The ability to control the material flow is mainly determined by the diameter of the small ball and the loading quantity.As It is influenced by big ball diameter is very small,it relieve the impact force among impact frequency, and ability to control the material flow.
Thus two-level match ball method is simpler when determining the distribution parameters.It can easily be done comprehensive consideration.