With the appearance biomass energy, making wood waste, sawdust, straw and grass into pellet fuels becomes an energy eco trend. As a professional pellet fuel machine manufacturer, YONGLI Machinery gives following pellet making solution. 1. Wood chipping process Peeled wood logs go through wood chipper, with the help of knife rollers, complete logs can be machined into 1-3cm size woodchips. 2. Woodchip grinding process Woodchips from last process get into wood grinder, which is motivated by electric fan, pass by hammer slicers, and finally become 3-4mm size sawdust. 3. S awdust drying process The moisture of grinded sawdust is much higher than required level before pelleting, so it’s necessary to dry materials into 13-18% humidity. 4. Pellet forming process With or without oil adding system, dried sawdust is forme...