While both the granules produced by a double-roller press granulator and the raw materials typically used in a BB fertilizer production line—such as urea, ammonium phosphate, and potassium chloride—are technically “granules,” they differ significantly in terms of shape, surface characteristics, and flowability. When extruded granules are fed directly into a BB fertilizer mixer, the issues...
When selecting a disc granulator, it is common to estimate output based on the surface area of the disc—assuming that doubling the diameter (which quadruples the area) should also quadruple the output. However, scaling up a disc granulator is not a simple geometric exercise. Increasing the disc diameter alters the material’s movement trajectory, residence time, bed thickness, and frictional...
In a biological organic fertilizer production line, operators often deem material acceptable if the moisture content—measured via samples taken at the outlet of the double-shaft mixer—falls within the 25%–35% range. The material is then fed directly into the biological organic fertilizer dryer. However, shortly after the dryer begins operation, issues arise: inconsistent moisture levels in the...
The pressure setting in roller press granulation directly determines the flake strength, fine powder circulation volume, and equipment lifespan. Typical operating pressures for roller presses of potash fertilizer and inorganic salts are approximately 30-50 kN/cm². If the pressure is too low, the flakes are brittle and easily broken, causing downstream crushing processes to break them into fine...
Choosing a cooling method for compound fertilizer essentially involves a trade-off between particle strength tolerance, cooling efficiency, footprint, and ambient humidity. Rotary drum cooling is versatile and has a high tolerance for particle strength, suitable for most compound fertilizers and organic fertilizer granules. Fluidized bed cooling is highly efficient and requires little space, but...
In a bio-organic fertilizer production line, operators often deem material “acceptable” if a sample taken at the outlet of a double-axis mixer shows a moisture content between 25% and 35%, subsequently feeding it directly into the bio-organic fertilizer dryer. However, the dryer soon encounters issues: uneven final moisture content, with some parts becoming over-dried and pulverized...
The answer depends on the control system and scheduling design. A high-efficiency trough-type compost turner equipped with PLC programming control can manage 5-8 fermentation troughs, achieving unattended continuous operation. The number of troughs managed is constrained by the trough length, turning speed, and the degree of automation of the control system. The core is not “human supervision,”...
The core difference in pre-treatment for chicken manure, cow manure, and pig manure before granulation lies not in the name “manure,” but in three physical indicators: moisture content, viscosity, and fiber content. Chicken manure is highly viscous and has a high moisture content, so the focus of pre-treatment is dehydration and anti-sticking. Cow manure has coarse fibers and low viscosity, so...
When fertilizer plants look to expand capacity or upgrade facilities, a common concept arises: share a single front-end system—covering crushing, proportioning, and mixing—and then split the process into two separate branches. One branch uses a fertilizer roller press to produce dry-pressed granules, while the other employs a new-type organic fertilizer granulator (such as a disc granulator) to...
The precision revolution in automated batching systems is reducing the batching tolerance in fertilizer production from the traditional ±2% to within ±0.5%. This seemingly small numerical leap is underpinned by systemic breakthroughs in hardware, algorithms, and process management. For NPK compound fertilizer, BB fertilizer, and organic fertilizer production lines, a ±0.5% tolerance means a...