... feeding device: it can make the hot air run into the dryer, the second function is feed Settings, ... high,you can control the dryer temperature by adjusting the dryer speed, supplier air rate, material flow.Number 4 ... centrifugal induced draft fan: to produce air fan, air pressure, etc. Extraction hot air from the heat blast stove , ... reference High Output Coal Rotary Dryer For Drying Mineral Substance