IsaMill with the same feed from the ball mill survey reached a 32 micron P80 in 17 kWh/t as shown in Figure 2 (Steele, 2011). This results in a 29% improvement over the ball energy to 32 microns. Figure 2 – Arrium ball mill versus M4 IsaMill. The basic principle of the IsaMill is that it fluidizes a charge of small ceramic grinding media. Media
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