I Think We Can Solve The Ball Mill Output!
Generally, there are three direct ways to raise the ball mill output:
1. place a fine crusher in front of the grinding mill;
2.improve the grinding system to raise the grinding effiency;
3.add a high efficient powder concentrator. Any way of the three can greatly raise the ball mill output. If allowed, the three ways can be used together which can achieve the best effect and is the trend of the ball mill grinder design system.
The relationship of the three is: the fine crush before grinding is the premise; the powder concentrating after grinding is the guarantee and the transformation in the ball mills grinder is the basic. The fine crusher before grinding decreases the particle size of the material thus lowers the grinding system load; the improve of the powder concentrating makes the fine powder finished product being picked out timely, decreasing the cement powder return rate and lowering the load of ball mill grinder; the transformation in ball mill grinder is the radical solution.
henan bailing machinery co.,ltd. ■
Ball Mill Theory
Nice concept Weychien - input ore > black box efficiency > output.
But to put numbers to the efficiency factor is not so easy. Different products react differently. Several factors influence the efficiency of ball mill grinding. The pulp density within the mill should be as high as possible consistent with ease of flow through the mill. It is essential that the balls are coated with a layer of pulp. Too dilute a pulp increases metal to metal contact - which increased steel wear and reduces efficiency.
Most do a bench test rather than relying on some theoretical model. ■
Reply
well...
It seem that there are no any calculation right?
I have ask some other that it is hard to determine the output of
the ball mill and most of them are based on their experiences.
i have got to know that the longer the material in the ball mill the finer the powder is. My input particle would be 1mm metal granul, pass through two series ball mill. Approximately how long should the process takes to produce a 10 micron powder?
estimated size of ball mill =0.7m
rpm = 30rpm ■
Residence Time
Good question.
Our Ball Mills are 3.350 m dia x 5.340 m long handling 220 tph at 2.0 Pulp SG. From that you could deduce a residence time.
For your size of work I would recommend you talk to someone in a Metallurgical Laboratory. You are dealing with laboratory sampling equipment.
Otherwise use the old cooking recipe - if its not fine enough, put it in a bit longer, or change the size and number of balls. ■
Output of Ball Mill
dear sir,
i am currently a final year student in University of Science Malaysia. As taking my design course, i was requested to design a small metal powder production plant, with production rate 20kg/hr and final product; 10micron metal powder.
i would like to install two series ball milling in my plant, by wonder how effecient is the ball mill is, is there any calculation to determine the product of the ball mill, i.e a coarse particle input, how fine is the output particle is.
Hope Sir can enlighten me. Thanks.
weychien@yahoo.com ■