Reasons Why Double Roller Press Granulators Are Unsuitable for Organic Fertilizer Granulation
Double roller press granulators are more suitable for dry inorganic fertilizers such as urea, ammonium phosphate, and potash. Processing well-rotted organic fertilizers presents several technological shortcomings; the forming effect, equipment wear and tear, and product quality all fall short of standards. This is the core reason why organic fertilizer plants prioritize disc granulators. Firstly, there is a serious incompatibility in the moisture content of the raw materials. Well-rotted cow manure and chicken manure generally have a moisture content of 25%–32%, with a soft and sticky texture. Roller extrusion relies on high-pressure extrusion molding; high-moisture organic materials will stick to the roller grooves, continuously clogging the mold and requiring frequent shutdowns for cleaning. In contrast, inorganic fertilizers have a moisture content of less than 10%, making them less prone to sticking to the roller grooves—a completely opposite compatibility. Forcibly d...