stones (sample: No. 3)

With a start size of ~ 2 mm, 20mm Ø grinding balls use to be suitable. After a total of 18 minutes of dry grinding, the complete sample has been ground to 95 % < 63µm. The desired target of d90 < 63 µm has been reached.

Because of light sticking of sample to bowl and balls, we recommend a grinding in suspension, if a better fineness should be achieved.