Diammonium phosphate (DAP) possesses unique physicochemical properties that demand a high degree of compatibility from granulation equipment. Due to its flexible structure and ease of operation, the disc granulator has emerged as the preferred choice for DAP granulation; its processing mechanism aligns perfectly with the material’s characteristics, delivering a process that excels in both efficiency and product quality.
First, it offers strong raw material adaptability and simplified pretreatment. Given that DAP powder is highly hygroscopic and prone to caking, the disc granulator requires no complex pretreatment; a simple light crushing to remove impurities—combined with the addition of a small amount of binder to regulate viscosity—is sufficient to prevent issues such as material clogging and wall adhesion.
Second, the granulation process is gentle, resulting in minimal nutrient loss. By utilizing a natural tumbling and bonding mechanism for formation—without the need for high temperatures or high pressures—the process maximizes the retention of nitrogen and phosphorus nutrients within the DAP, preventing decomposition and loss, thereby ensuring the stable fertilizer efficacy of the finished product.
Third, process parameters are adjustable, allowing for precise control over the finished product. The disc’s inclination angle and rotation speed can be flexibly adjusted to precisely control granule size and sphericity, thereby catering to various application scenarios. This results in a high granulation rate, producing uniform, compact granules that are resistant to breakage.
Fourth, the workflow is streamlined, and maintenance is convenient. The stages of feeding, granulation, and discharging are seamlessly integrated. The equipment features few wear parts, making cleaning and maintenance simple; furthermore, off-spec granules can be recycled for secondary granulation, minimizing material waste and making the system ideally suited for small-to-medium-scale processing operations.
These distinct characteristics make the disc granulator the perfect match for processing diammonium phosphate, enabling a granulation process that is highly efficient, high-quality, and low-waste.
