The IsaMill A Great Australian Mining Innovation Past
1. 198990: Initial stage, regrinding to 15 #181;m (ball mill, inert media). Evaluation of concentrate quality (marketing study) must regrind to 7#181;m. 2. Mid1990: Purchase of laboratory batch bead mill ( a stirred mill with inert media) with much increased capability. 3. 199091: Second stage of laboratory work with regrind to 7 #181;m.