The drum screener machine is a piece of screening equipment composed of a motor, a speed reducer, a drum assembly, a frame, a sealing cover, and inlet/outlet ports. In fertilizer production, it is primarily used to separate finished products from material to be recycled; it also enables product grading, ensuring the finished product is sorted uniformly.
Simply put, the drum screener machine operates by "sifting" fertilizer granules of varying sizes produced during granulation: granules meeting specifications proceed to the packaging stage, while non-conforming ones (either too large or too small) are sent back to the production line for reprocessing.
The working principle of the fertilizer drum screener machine is not complicated. The core of the equipment is a cylindrical drum mounted at an angle, the walls of which are formed by screens.
After the material enters from the high end (feed end) of the drum, the motor drives the drum to rotate around its axis at low speed through the reducer. During the rotation of the drum, materials are continuously lifted, tumbled, and thrown down along the drum wall under the combined action of gravity, centrifugal force, and friction. Fine particles smaller than the screen hole size are discharged through the screen and become qualified finished products; coarse particles larger than the screen hole size gradually move toward the lower end along the inclined inner wall of the drum, and are finally discharged from the end of the drum.
There are several key parameters worth noting in this process:
Drum inclination angle: generally 3° to 8°. The larger the inclination angle, the faster the material passes through, but the screening time is shortened; the smaller the inclination angle, the longer the material residence time is and the screening is more complete.
Drum speed: Fertilizer screening usually operates at low speed, and the speed range is generally 5-30 rpm. Low rotational speed is suitable for coarse screening, while high rotational speed can improve fine screening efficiency.
Screen aperture: Flexible configuration according to application scenarios - 10-20mm aperture is usually used for pre-screening of fermentation materials, and 2-4.5mm aperture is generally used for grading finished products after granulation.
A complete drum screener machine for fertilizer typically consists of the following components:
This is the “heart” of the equipment, comprising the screen mesh and its supporting structure. The screen mesh is the core component; common materials include carbon steel, stainless steel, manganese steel, and polyurethane. For applications involving corrosive materials—such as organic fertilizer—stainless steel or high-strength manganese steel are more reliable choices.
This includes the motor and the gearbox. The motor provides power, while the gearbox reduces the high rotational speed to a lower speed suitable for screening; power is then transmitted to the drum via a chain or belt.
This supports and secures the rotary drum assembly, ensuring stable equipment operation.
This encloses the entire screening mechanism, effectively controlling airborne dust and improving the working environment.
This is a key design feature that distinguishes fertilizer rotary screening machines from standard screening equipment. Fertilizer materials are often somewhat sticky and prone to clogging the screen mesh. A plate-type cleaning mechanism continuously "combs" the screen during operation to prevent the mesh openings from becoming blocked.
The drum screener machine is an indispensable piece of classification equipment in fertilizer production; its design—combining an inclined rotating mechanism with a self-cleaning screening action—gives it unique advantages when handling materials with high moisture or high viscosity. Selection should be based on a comprehensive assessment of raw material characteristics, production scale, and finished product specifications; for the production of powdered organic fertilizer or the processing of high-moisture materials, the rotary drum screen offers the best cost-performance ratio.
| Model | Barrel | Rotation Speed | Inclination | Power | Capacity | Dimensions | Weight | |
| Diameter | Length | L× W × H | ||||||
| mm | mm | r/min | 0 | kW | t/h | mm | tons | |
| GS1.0×3.0 | 1000 | 3000 | 22 | 2-2.5 | 2.2 | 1-3 | 3500×1400×2200 | 1.5 |
| GS1.2×4.5 | 1200 | 4500 | 17 | 2-2.5 | 3.0 | 3-5 | 5700×1600×2400 | 2.5 |
| GS1.5×5.0 | 1500 | 5000 | 14 | 2-2.5 | 5.5 | 5-10 | 6860×1900×2810 | 3.8 |
| GS1.0×3.0 | 1000 | 3000 | 22 | 2-2.5 | 2.2 | 10-20 | 3500×1400×2200 | 1.5 |
| GS1.6×6.0 | 1600 | 6000 | 12 | 2-2.5 | 7.5 | 10-20 | 7300×2000×3000 | 4.7 |
| GS1.2×4.0 | 1200 | 4000 | 16 | 2-2.5 | 3.0 | 20-25 | 5200×600×2360 | 2.3 |
| GS1.8×6.5 | 1800 | 6500 | 11.5 | 2-2.5 | 7.5 | 20-25 | 9000×2200×3200 | 6.0 |
