Working Principle and Significant Advantages of a Flat Die Granulator
The flat die granulator is a commonly used machine for forming fertilizer granules. Its unique structure occupies a key position in small and medium-sized production lines, and its working principle and performance advantages are outstanding. The core operating principle is "extrusion molding." The machine features a disc-shaped flat die with uniform apertures at the bottom, topped by a rotating roller. Pretreated raw materials (powder or paste with a moisture content of 15%-20%) enter the machine cavity, where the rotating rollers continuously press the raw materials against the die surface. Under pressure, the raw materials are squeezed into the die holes, forming cylindrical strands. These strands are then cut into pellets of a desired length by a cutter located outside the die holes. The entire process eliminates the need for high-temperature melting, relying solely on mechanical extrusion and physical molding. This makes it suitable for processing heat-sensitive raw mat...