Powder is charged into the bowel of SMG and wetted by a liquid or a melt sprayed from the top nozzle. At the same time, the material is vigorously mixed by a mixer and chopped by a chopper. The wet granules are normally discharged into a core mill before they are dried by a fluid bed drier. The granules made by SMG are rounder and stronger than the granules made by the top spray fluid bed.