What are the differences between dry granulators and dry granulators? Below, the editor will briefly introduce to you:
1、 Applicable materials:
Dry granulator is mainly suitable for powdery materials with certain fluidity, granular materials that are not easy to agglomerate, etc. Some of these materials require the addition of some molding aids during processing to ensure the quality and stability of the particles.
Dry granulators have a wider applicability than dry granulators and can prepare a wide range of materials, such as coal, asphalt, urea, phosphoric acid, zinc oxide, aluminum oxide, calcium carbonate, silicon powder, silicates, etc.
2、 Working principle:
The dry granulator uses a compressor to compress the gas into high-pressure gas, and then sprays the high-pressure gas into the accelerator through a nozzle, increasing the gas velocity and decreasing the pressure, thereby generating a local vacuum; Then add powdered or granular raw materials, mix them with high-speed airflow, instantly expand and scatter, while being subjected to high-speed airflow shear, collision, friction and other effects, forming tiny particles, and finally forming spherical cylindrical or sheet-like particles, which are discharged from the discharge port.
The dry granulation machine uses a compressor to send compressed air or nitrogen into an extruder, extruding the material into the necessary shape, and then using cutting devices to cut and shape it into particles.
3、 Product features:
The particle size distribution range obtained by the dry granulation mechanism is narrow, with good uniformity, and the density of the finished particles is relatively low, making it easy to package, transport, and transport. It is particularly suitable for preparing certain low strength, smooth surface particle products, such as carbon powder, pigments, etc.
The particles prepared by the dry granulation mechanism have a high density, hardness, and surface smoothness, and usually do not require the addition of auxiliary agents. Therefore, the finished product has good physical and chemical properties, and is particularly suitable for preparing certain high-strength, high-density, and high specific surface area particle products, such as silicon carbide.
In summary, the main differences between dry granulators and dry granulators lie in their applicable materials, working principles, and product characteristics. Therefore, in specific applications, the selection needs to be based on factors such as material characteristics and process requirements.