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The core of a double roller press granulation line is the double roller press granulator , acting like an efficient "sculptor." Pretreated fertilizer raw materials (whether organic, compound, or mineral fertilizer) are first conveyed to a silo, where they are then evenly fed into the granulator by a feeder.Two high-pressure rollers rotate against each other inside the machine, forcibly squeezing the raw materials into flakes. These are then crushed and screened to instantly form uniformly sized granules. This entire process requires no water or binders, reducing energy consumption while maximizing nutrient retention, making it particularly suitable for the production of heat-sensitive fertilizers. During the raw material pretreatment stage, a crusher refines the lumpy raw materials to the desired particle size, while a blender precisely mixes them according to the recipe, preparing them for extrusion granulation.
In addition to the core double roll press granulator, the production line also requires "supporting partners" to enhance efficiency. Vibration screener quickly separate qualified granules from fine powder, which can then be recycled back into the pelletizer, eliminating raw material waste. Quantitative packaging machines precisely package finished granules into different sizes based on demand, facilitating subsequent storage and transportation. Dust collectors collect dust generated during production, maintaining a clean workshop and minimizing raw material loss, thus meeting environmental standards. These devices, working in conjunction with the double roller press granulator, ensure efficient and environmentally friendly fertilizer production from raw material to finished product.
Today, global agriculture is striving for cost reduction, efficiency improvement, and green production. Double-roll extrusion granulation lines eliminate the drying step, reducing energy consumption, and offer the flexibility to accommodate a wide range of raw materials.