
— Roller mill: Aspen: 93–83: Chips [13] Wet grinding (Fig. 6) net: HM + ACM: Hammer mill + Air classifier mill: Douglas fir <3: Chips [121] Pilot-scale: net: 5.2. Wet grinding. In general, wet grinding in a liquid medium like water is more energy efficient than dry grinding in a gaseous medium, typically air [124]. Wet grinding of wood in an ...