Ball Mill Grinding Media Calculation

Release time：2021-10-12

How does the ball mill add steel balls in proportion to the size of steel balls  

This is based on the ball mill diameter, ore hardness, ore particle size into the ball mill, ball hardness (quality), ball mill speed and other factors to determine.  

When the type of the ball mill is determined, the speed of the ball mill is also set.  The hardness of ore can be measured.  Into the ball mill ore particle size, by changing the screen size to determine.  How to add steel balls to the ball mill in proportion to the size of steel balls?  Now the author summarizes the perennial practice and theoretical experience as follows:  

Usually, the new ball mill has a run-in process, in the run-in process, the steel ball amount is added for the first time, accounting for 80% of the maximum ball amount of the ball mill, the proportion of the steel ball can be added according to the size of the ball (coin 120 mm, 100 mm, @80 mm, @60mm, P40 mm) size.  

The amount of steel ball added: the total amount of different ball mills is different.  For example, MQG1500×3000 ball mill (handling capacity of 100-150 tons) maximum ball loading capacity of 9.5-10 tons.  For the first time, steel balls (120 mm and C10o mm) accounted for 30%-40%, medium balls 8O0 mm accounted for 40%-30%, small balls (60 and 40 mm) accounted for 30%.  Why in the process of ball mill in the steel ball only add 80%, because after installation of ball mill, ball mill tooth need to mesh size, capacity (ore) are to be gradually increased, for normal operation in two or three days in a row, ball mill stop ball mill pick up to check the size of the gear meshing, for everything is normal, open the add the remaining 20% steel ball mill manhole covers the second.  

After the ball mill starts up and runs normally, the steel balls of each class should be added according to 3:4:3(3 for 120 mm, 4 for 100 mm and 3 for C80mm).  Note: the addition of small steel balls is only used for the first time.  Because, when the ball mill is in normal operation, the reasonable friction between the ball and the ball, the ball and ore, the ball and the ball mill lining plate will increase the abrasion, so that the large ball mill is small (mill for ball), ball mill for small ball.  So normally, you don't need to add more balls.  Adding small balls is in the useful mineral particle size without monomer separation, when the fineness of the mill can not meet the flotation requirements, you can add appropriate amount of small balls.  

The steel ball in the ball mill is constantly wearing in the process of operation. In order to maintain the reasonable ratio of ball load filling rate and ball, and maintain the stable operation of the ball mill, it is necessary to carry out reasonable ball filling and low compensation wear.  

The added weight of steel balls determines the amount of ore ton consumption according to the quality of steel balls and the quality of steel balls.  It is better to use the new wear resistant steel ball.  The best (good quality) steel ball addition is calculated according to the amount of ore treated per ton (that is, add o.8 kg per ton of ore) general steel ball treatment of a ton of ore needs (1 kg - 1.2 kg).  

Steel ball size ratio: the ratio of different ball mill models is different.  The diameter of the ball mill is below 2500 mm, and the size of the steel ball is C100 mm, C 8O mm and 60 mm.  Ball mill diameter in 2500 mm or more, add steel ball size must be 120 mm, C10o mm, Cso mm.