... drying slag, limestone, coal powder, clay, sawdust, oil palm fiber, coconut fiber, grass, river stone, poultry ... wood, and etc. 4. Mode of flow: direct flow or counter flow. It is based on the different materials. ... Then the materials would be dried.Photos of oil palm fiber dryer at our factory: innner ... structure We have successfully established 3 such oil palm fiber drying line in Malaysia, which ...