- To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN
- Use Add New Topic to ask a New Question/Discussion about Grinding.
- OR Select a Topic that Interests you.
- Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.
- Use Add Comment = to comment on someone else’s Reply in an already active Topic/Discussion.
-
https://www.911metallurgist.com/wp-content/plugins/wp-symposium-pro/forums/../css/images/wait.gif
Rod Mill Tangling and Minimum Rod Makeup Diameter (7 replies)
Please join and login to participate and leave a comment.
Hello Mets,
I'm looking for information around rod mill media size selection to prevent rod tangling. There is the rule that the length of the mill/rod should be 1.4 to 1.6 times the diameter but there is very little information on if there is a minimum diameter of the rod makeup size to use to prevent tangling.
My understanding is that makeup rods need to be a sufficient size to break the worn rods into small pieces so that they won't tangle. What would be this minimum size to ensure breakage? Does it depend on rod mill length/diameter? i.e. is the minimum diameter rod the same for a 2m long mill as a 5m long mill?
This isn't an issue generally come across as rod media size is usually estimated from the Allis-Chalmers equation, however, it is not able to be used in this case as the rod mill is being used as a secondary grinding mill (after a primary rod mill, F80~1mm), and the estimated rod size from the equation is much smaller than can be practically made.
I know secondary rod milling is inefficient grinding but there are product size distribution reasons downstream for it. Hence, looking to improve efficiency as much as I can by decreasing current rod makeup size but need to know what the limits are and avoid tangling.
Any help would be greatly appreciated.
Brendan