How can I determine the best RPM and balls to powder ratio for wet Ball Milling?
Hello, the below article should help you.
Article Wet ball milling of niobium by using ethanol, determination ...
dear mam,
I am particularly looking for ball clay grinding which contains Fe2O3 and other impurities. which is hard to grind. so need a proper water ratio for making slurry of it.
Measure the quantity of solvent (water/non aqueous based) that can be filled in your grinding jar (fill it upto the neck). Suppose after weighing the solvent you get 100 gm (solvent), now you can divide by 3 i.e., 33.3 gm of powder, 33.3 gm of solvent and 33.3 gm of grinding media...If you feel the quantiy of grinding media is less, keep the powder and solvent as constant (33.3 gm each) and you can go for 66.6 gm of grinding media (1:2 ratio)..whatever ratio you take, keep the weights constant from batch and batch, even milling time also should be constant. If you follow this PSD you acheive will be +/-0.2micrometer variation from batch to batch..if you are using pot mill keep RPM as 80. if u r using high energy ball mill take any RPM greater than 300 and try to keep the all the variables constant for every batch to get consistent results in PSD. Prefer ceramic/metal jar for consistent results instead of polymer one. with polymer jar ur results will vary a lot.....
On the ball-to-charge volume ratio (BCVR) for tumbling ball mills ― At this forum:
https://www.researchgate.net/post/How_to_calculate_the_BPR_of_the_powder_in_the_ball_milling_machine
About the optimization of ball mills. ― You may find useful to check: https://www.researchgate.net/post/iv_to_reduce_size_of_tungsten_in_ball_millIs_it_possible https://www.researchgate.net/post/How_can_I_determine_the_best_RPM_for_Dry_Ball_Milling_machine_in_order_to_let_the_balls_to_fall_from_the_best_angles
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