Relationship between Organic Fertilizer Dry Granulators and Double Roller press Granulators

Organic fertilizer dry granulators and double roller press granulators have a subordinate relationship. The double-roller extrusion granulator is one of the core and most widely used models in the organic fertilizer dry granulation machine system.

The organic fertilizer dry granulation machine is a general term for a large category of equipment. Its core characteristic is that it does not require the addition of extra water or binders during the granulation process. It relies entirely on physical forces to compress and agglomerate low-moisture dry powdered organic fertilizer raw materials into regular granules. This effectively avoids the drying step of wet granulation, significantly reducing energy consumption and production costs, and meeting the energy-saving and cost-reduction needs of modern organic fertilizer production. This type of equipment includes various technical routes and models, including flat-die extrusion granulators, ring-die extrusion granulators, and other categories, in addition to double-roller extrusion granulators.

The double-roller extrusion granulator is a typical representative of dry granulation technology. Its working principle is to use a motor to drive two parallel and counter-rotating pressure rollers to powerfully compress the dry powdered organic fertilizer raw materials conveyed between the two rollers.  It first compresses the material into a dense cake, and then through subsequent crushing, screening, and shaping processes, finally obtains organic fertilizer granules with uniform particle size and qualified strength. Due to its high granulation efficiency, stable particle formation rate, and wide range of applicable raw materials, this model occupies a dominant position in large-scale organic fertilizer production lines and is the preferred equipment for many organic fertilizer production enterprises to implement dry granulation technology.

In short, the double-roller extrusion granulator is a key member of the organic fertilizer dry granulation machine family; the two have a whole-to-part relationship.