2026/04/13
Under standard operating conditions: Ordinary carbon steel roller shells exhibit poor wear resistance and are typically used for processing small-scale, soft materials, with a replacement cycle of 1 to 3 months. Alloy steel roller shells are suitable for the routine production of organic and compound fertilizers, offering a service life of 3 to 6 months. Wear-resistant cast iron or ceramic materials provide superior resistance to both abrasion and corrosion, lasting between 6 and 12 months. High-end roller shells featuring hard alloy surfacing offer the longest service life, potentially lasting from 1 to 2 years.
Immediate replacement is mandatory if any of the following conditions occur: the spherical socket pattern on the roller shell has worn down by more than two-thirds of its original depth; the roller surface exhibits cracks, chipping, peeling, or deformation; equipment throughput drops by more than 15%, or the motor load rises abnormally; or the granulation molding rate falls below 70%—resulting in loose, uneven granules—and this issue persists despite adjustments to the roller pressure and gap.
Processing hard, corrosive materials—particularly those containing abrasive grit or metallic impurities—will accelerate wear. Furthermore, improper operating practices—such as uneven feeding, running the machine under excessive pressure, neglecting lubrication, or starting/stopping the machine while material remains in the rollers—can significantly shorten the roller shells' service life. To ensure optimal granulation efficiency, maintain high product quality, and minimize long-term energy costs, it is essential to implement daily protective measures (such as iron removal), ensure uniform material feeding, and conduct regular lubrication and inspection checks. In cases of minor wear, the roller shells may be restored and reused via hard-facing repair; however, in cases of severe wear, direct replacement with new components is recommended.
