 |

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:
Karin Carros - Social Media Manager at General Forge and Foundry - I am working with Teo on an relationship management system (RMS) to allow my sales staff and customers to interact through my website. He always comes up with the right questions to make me think through the process and always has great ideas on how the system can handle them. For any RMS project, you can't go wrong with Teo. - March 19, 2012, Karin was Teo's client |
|
Featured [ball mill] Articles:
|
 |