2026/02/12
Improving the crushing density of half-wet material crushers hinges on controlling raw material moisture content, optimizing the structure of fertilizer produciton machine, and stabilizing process parameters to reduce agglomeration and voids, resulting in a finer and denser finished product.
Raw material pretreatment is fundamental. Maintain a moisture content of 40%–60%. Excessive moisture leads to clumping and adhesion to the walls, while insufficient moisture causes dust and loosening. Remove impurities such as sand, gravel, and metal beforehand, pre-break up large pieces of material using the equipment, and cut long-fiber materials to prevent entanglement and maintain crushing efficiency.
Equipment optimization is crucial. Use a composite blade assembly combining shearing, extrusion, and impact to maintain blade sharpness and enhance crushing force. Apply anti-sticking treatment to the inner wall of the machine cavity to reduce material adhesion. Replace with smaller aperture screens (3–8mm), and incorporate a vibration self-cleaning and forced screening device to extend the crushing path and ensure uniform output particle size. Appropriately increase the rotor speed (300–500 r/min) to enhance crushing and compaction effects.
Process parameters must be precise and stable. A uniform, metered feeding method is employed to prevent uneven crushing caused by inconsistent feed amounts. A graded, circulating process is implemented, returning coarse material for secondary crushing to create a balanced particle size distribution, significantly reducing particle porosity. Vibrating feeders or compaction structures can be added at the discharge end to rearrange particles using external force, further increasing bulk density.
These combined measures effectively reduce material agglomeration and blockage, resulting in finer, more uniformly distributed finished particles and a 15%–30% increase in crushing density. This also improves the efficiency of subsequent granulation and fermentation processes.
