 |
How to Optimise the Speed of the Ball Mill |
|
Submitted by ballmill
| RSS Feed
| Add Comment
| Bookmark Me!
The speed of a Ball Mill is in measured in revolutions per minute (rpm) of its drum.To measure this, you need a stopwatch (preferably that rings!) and a thick felt pen. Mark a bold line lengthwise on the outside of the drum. Then start the loaded ball mill and allow it to reach its steady loaded speed. Then press the stopwatch timed for a minute, and count the number of times the bold line comes into view before the stopwatch rings.
The speed of rotation (rpm) of the loaded ball mill is critical to success:too slow, and the milling takes too long; while too fast, and the contents (balls, ore and water) slam against the wall, inhibiting milling.Now use trial-and-error to discover the critical speed at which the centrifugal force pins the balls against the inside of the drum - they cease to roll and no longer fall. For this, the ball mill should be fitted with a variable speed drive.
The critical speed can also be derived by 42.3/D0.5 where D is the diameter in METRES. For instance, a 90cm diameter ball mill has a critical speed of 44 rpm. For efficient milling, the critical speed is too high - you need now to determine the optimal speed which is about 70-75% of the critical speed. For instance a 90cm diameter ball mill with a critical speed of 44 rpm has an optimal speed of 31 to 33 rpm. Get ball mill,beneficiation,ball mill From http://www.ballmill8.com
The speed of a Ball Mill is in measured in revolutions per minute (rpm) of its drum.To measure this, you need a stopwatch (preferably that rings!) and a thick felt pen. Mark a bold line lengthwise on the outside of the drum. Then start the loaded ball mill and allow it to reach its steady loaded speed. Then press the stopwatch timed for a minute, and count the number of times the bold line comes into view before the stopwatch rings.
The speed of rotation (rpm) of the loaded ball mill is critical to success:too slow, and the milling takes too long; while too fast, and the contents (balls, ore and water) slam against the wall, inhibiting milling.Now use trial-and-error to discover the critical speed at which the centrifugal force pins the balls against the inside of the drum - they cease to roll and no longer fall. For this, the ball mill should be fitted with a variable speed drive.
The critical speed can also be derived by 42.3/D0.5 where D is the diameter in METRES. For instance, a 90cm diameter ball mill has a critical speed of 44 rpm. For efficient milling, the critical speed is too high - you need now to determine the optimal speed which is about 70-75% of the critical speed. For instance a 90cm diameter ball mill with a critical speed of 44 rpm has an optimal speed of 31 to 33 rpm. Get ball mill,beneficiation,ball mill From http://www.ballmill8.com
Click for Details --> http://www.ballmill8.com <--
|
|
|
|
|
LinkedIn Recommendation:
 Logan Vaughn - Graphic Artist at Zevo Toys Studio - I had Teo make some video Tutorials and used one of his voice over specialists for the project. Great work. Quick work too. They're really short, but cover everything. I couldn't have scripted anything near as good as what I got. If you are looking for video tutorials, Teo is the man! - March 17, 2012, Logan was Teo's client |
|
Featured [ball mill] Articles:
|
|
