Non dry extrusion granulation technology and characteristics of double roller granulator the non dry extrusion granulation technology of twin roll extruding granulator is widely used in powder particle processing. It is characterized by direct treatment of particles without humidification or heating. It can be used for processing organic and inorganic fertilizer particles, as well as feed particles.
The non dry extrusion granulation process is adopted, so there is no waste water and waste gas emission in the production process, and the environment is not polluted. The extrusion granulation process is short, easy to operate, easy to realize automatic production control and improve production efficiency. There are no special requirements for the properties and particle size distribution of raw materials, so the sources of raw materials are relatively wide.
Five technological stages of double roller granulation process for organic and inorganic fertilizers
1. Add qualified raw materials into the mixer according to the ratio requirements, and mix evenly.
2. It is conveyed to the disc feeder and the metal substances in the material are removed during the conveying process.
3. The materials in the disc feeder are uniformly fed into the extruding granulator, forcing the materials to be extruded into thin sheets between two pressure rollers, crushed into pieces by a coarse crusher under the pressure roller, and then screened. The material on the screen continues to be crushed and screened.
4. The semi-finished products are transported to the finished product screening machine. The screened fine particles are directly returned to the disc feeder. The large particles are crushed by the crusher and then returned to the disc feeder.
5. The qualified products are sent to the automatic packaging scale for weighing, packaging and warehousing.
The non drying double roller granulator has the following characteristics when producing granules:
1. Extrusion granulation does not require heating and humidifying materials, saving investment and energy. It is also suitable for granulation of heat sensitive materials including ammonium bicarbonate and some organic fertilizers.
2. No waste water and waste gas are discharged in the production process, and no environmental pollution is caused
3. The extrusion granulation process is short, easy to operate, easy to realize automatic production control and improve production efficiency.
4. There are no special requirements for the properties and particle size distribution of raw materials, so the raw materials are widely sourced.
5. The production is relatively flexible, and the product scheme can be changed at any time, which is conducive to the small batch production of special fertilizer.
6. The particle size distribution of the product is uniform, without segregation or agglomeration.
7. The shape of extruded granulation products is uniform and not round. In general, if you need a more rounded product, you need to further reshape the particles.
