Rougher Grind Size Will Be The Key To RecoveryThe attached spreadheet plots the theoretical smallest awaruite grain recoverable for various grind sizes. It is based on a simple formula for the volume of spheres and on a LIMS recovery threshold of 5% by volume of magnetic material in a given particle. This 5% number was provided in the preamble to the 2013 PEA.
https://ufile.io/y6pxp Looks like 150 micron primary grind is about as big as we can go. 75 micron is likely preferable, but obviously more expensive.