A tray oven needs six to twelve hours to dry a wet granulate; a high efficiency fluid bed dryer finishes the same batch in 20 to 30 minutes. The GFG-500 achieves this by suspending the wet granules in a hot air stream inside a round fluid bed, where every particle is exposed to the drying air at the same time. Because the whole 500 kg batch is fluidized at once instead of drying from the tray surface inward, the moisture gradient across the bed stays flat and the finished