The rotary drum granulator has a rigorous and efficient process in the field of fertilizer processing. Below, we will analyze this process in detail to understand how it converts various raw materials into high-quality fertilizer granules.
The first step in the process is raw material preparation. This stage requires meticulous processing of various fertilizer raw materials. Organic raw materials, such as animal and plant residues, waste organic matter, etc., need to undergo sufficient fermentation to remove harmful substances and convert them into nutrient rich humus. Inorganic raw materials need to be accurately weighed and crushed to ensure their particle size meets the requirements for subsequent processing. At the same time, it is necessary to strictly control the humidity of the raw materials to reach a suitable range for granulation, generally within a certain percentage range.
After the raw materials are prepared, they enter the feeding process of the rotary drum granulator. The raw materials are uniformly and stably fed into the rotating drum through specialized conveying equipment. The drum is the core component of the drum granulator, which starts rotating at a set speed under the drive of the power device.
As the drum rotates, the plate inside the drum continuously lifts the raw materials, causing them to form complex motion trajectories inside the drum. At this point, the nozzle installed inside the drum begins to work, spraying adhesive and an appropriate amount of water onto the moving raw materials. Adhesives can bond small raw material particles together, while moisture plays a role in assisting bonding and regulating particle humidity, promoting particle aggregation.
During the continuous rotation of the drum, the small particles that have already bonded together gradually grow through rolling and collision. The new raw materials continue to adhere to the existing particle surface, causing the particle volume to continuously increase. At this stage, operators need to closely monitor the growth of particles and control the size and shape of particles by adjusting parameters such as the rotation speed and inclination angle of the drum. For example, reducing the rotational speed appropriately can give particles more time to aggregate, thereby forming larger particles; Adjusting the inclination angle can change the movement path of the raw material inside the cylinder, affecting the uniformity of the particles.
When the fertilizer particles reach the expected size and quality standards, they are discharged from the outlet of the rotary drum granulator. However, at this point, the particles may still contain some moisture and require subsequent drying treatment to reduce moisture content, improve particle stability and storage performance.
The dried fertilizer particles then enter the screening process. By using screening equipment, particles that do not meet the particle size requirements are separated for further processing or recycling. Qualified particles are transported to the packaging process for quantitative packaging, ultimately becoming fertilizer products available for market sale.
The rotary drum granulator achieves efficient conversion from raw materials to high-quality fertilizer particles through a series of orderly processing procedures, providing strong support for agricultural production.