Double roller press granulator: the "core fertilizer equipment" in fertilizer granulation?

, with its unique advantages of requiring no drying and low energy consumption, has become a new choice for many fertilizer companies. It operates not in isolation but works closely with raw material processing, screening, and conveying equipment to directly compress powdered fertilizer raw materials into granules, creating an efficient and environmentally friendly granulation solution for the production of organic and compound fertilizers.

After the production line starts, the raw materials are evenly distributed by a vibrating feeder before being steadily conveyed to a  double axis mixer. If the raw materials are uneven in composition or have unsuitable moisture levels, the mixer can add a small amount of binder or conditioner to create a uniform mixture—this step, like kneading dough, prepares the material for subsequent granulation. The mixture is then conveyed to the core of the twin-roll extrusion granulator. Two counter-rotating steel rollers, acting like a powerful dough sheeter, apply immense pressure to squeeze the material into thin sheets of uniform thickness.

Next, the flakes enter a crushing and screening machine: a crusher breaks the flakes into irregular particles, and a   drum screener machine selects particles that meet specifications (typically 2-5 mm). Unqualified particles are sent back to the mixer for reprocessing, achieving zero raw material waste. The entire granulation process eliminates the need for high-temperature drying, saving the energy of drum dryers and preserving volatile nutrients in the fertilizer (such as probiotics in organic fertilizers and trace elements in compound fertilizers). This effectively solves the problems of high energy consumption and nutrient loss associated with traditional granulation.

Furthermore, the double-roller extrusion granulator offers exceptional adaptability. For organic fertilizer production, it can easily process powdered raw materials from fermented livestock and poultry manure. For compound fertilizer production, it can accommodate the mixed granulation of various raw materials, including nitrogen, phosphorus, and potassium. Furthermore, its simple structure requires only regular inspection of the steel rollers for wear and cleaning the interior of the machine, making its operation much easier than other granulation equipment.

From raw material mixing to finished granules, the double-roller extrusion granulator, with its ingenious "extrusion molding" process, has redefined energy-saving standards for fertilizer granulation. Its synergistic operation with supporting equipment reduces energy costs and improves product quality in fertilizer production.