The granulation process in a disc granulator is essentially the rolling of material along a fixed path on an inclined disc surface, where particles grow through the successive adhesion of material layers. This path is determined by the disc’s inclination angle, the verticality of the main shaft, and the levelness of the machine frame. When factories observe a drop in granulation efficiency or...

The essence of organic fertilizer granulation lies in introducing energy into loose, powdered material to “lock” the particles together. However, the mechanisms used to achieve this “locking” vary significantly between different types of equipment: roller-press granulators utilize static pressure; New type organic fertilizer granulators employ impact and friction; and...

The layout of the lifting plates and baffle rings in the internal structure of a rotary drum granulator directly determines the tumbling pattern of the material bed inside the drum and the density of the particles. Even with the same formula and rotation speed, significant differences in particle strength often stem not from the formula, but from the internal structure. For compound fertilizer...

NPK granulation temperature is typically controlled between 70–80℃. This range is derived from long-term practice using tubular reactors with ammoniation: within this temperature window, the liquid phase content of the material is moderate, and the pelleting rate can reach 70%–80%. Excessive temperature accelerates urea hydrolysis and ammonia volatilization, while insufficient temperature results...

Pre-dehydration is the key. Reducing the initial moisture content to 25%–30% is the single most effective step to stop a chicken manure fertilizer machine from plugging its die. Nine times out of ten, chicken manure pelleting mold blockage is not caused by the wrong die orifice diameter or insufficient pressure, but by the failure to reduce the initial moisture content before feeding. Fresh...

The core difference in choosing organic fertilizer granulation equipment lies between disc granulators and roller granulators. Disc granulators achieve a granulation rate of 80%–90% and produce well-spherical particles, but require a drying process. Roller granulators, being a dry extrusion method, do not require drying and consume 30%–50% less energy than the disc-plus-drying combination...

When selecting a pelletizer, buyers usually focus on moisture content, capacity, power, and price, but they most easily overlook a more fundamental parameter — the particle size distribution (PSD) of the raw material. PSD is more insidious than moisture: high moisture content is visible to the naked eye and can be felt by hand, while uneven particle size distribution often only becomes apparent...

When purchasing granulation equipment, production capacity figures are the most immediately apparent metric. However, what truly determines whether a production line can operate stably in the long term is often the equipment’s “feed window”—that is, its tolerance range regarding the moisture content, fineness, and stickiness of the raw materials. While capacity dictates how much can be produced...

When selecting equipment, many people ask, “What pressure (in MPa) should this machine be set to?” However, the pressure setting for a double-roller press granulator is not a fixed value to be looked up in a table; rather, it is a dynamic range determined by the material’s characteristics, fineness, moisture content, and the target granule strength. Treating pressure as a fixed value often leads...

In the fertilizer industry, errors fall into two categories: those that can be rectified and those that cannot. If the proportions in a blended fertilizer are incorrect, the issue can be fixed by re-weighing and re-mixing the ingredients—provided the raw materials remain intact and the granules are not crushed. Conversely, if a batch of bio-organic fertilizer is not fully fermented, or if the...