The actual capacity of a roller press granulator produciton line depends on more than just the specifications of the main machine; it is determined by five core conditions: raw material characteristics, roll shell configuration, auxiliary pre-treatment fertilizer production machine, downstream screening and material recycling, and operational control. A bottleneck in any of these areas can significantly reduce actual output.

Raw material pre-treatment is a fundamental determinant. Material moisture content, fineness, and impurities directly limit capacity. For chemical fertilizers, keeping moisture below 5% and ensuring fine, clump-free powder allows for smooth feeding and full-load production; conversely, organic fertilizers with high moisture (>25%), high coarse fiber content, or impurities like hard lumps and stones cause sticking and clogging, necessitating slower feeding speeds and cutting output in half.

Roll shell and main machine configuration are critical. Roll diameter, pocket size, and material composition determine the output per extrusion cycle. Large-diameter, wide-face rolls process more material per cycle, yielding higher capacity; shallow pockets or severely worn rolls result in poor forming and excessive fines, forcing a large volume of material to be recycled for reprocessing and drastically reducing effective output. Improper roll gap adjustment also hampers hourly output: a gap that is too narrow causes the machine to stall or trip due to overload, while a gap that is too wide produces loose granules and increases the recycle rate. Insufficient main motor power leads to speed reduction or overload when handling sticky materials, causing a simultaneous drop in capacity.

Daily maintenance and process control ensure stability. Failure to promptly clean material sticking to the rolls, increased resistance due to lack of bearing lubrication, and frequent equipment breakdowns reduce effective production time. Only by properly managing the dosage of binders in the formula—thereby minimizing roll sticking, clogging, and downtime—can the equipment consistently maintain its rated capacity.