The roller extrusion granulator is widely used in the process of processing fertilizers from various raw materials due to its strong adaptability. Whether it is processing organic or inorganic compounds, it can demonstrate good granulation effect. The following are some common considerations and techniques for using roller extrusion granulators to process fertilizers with different raw materials:
1. Treatment of organic raw materials
Feature recognition
High moisture content: Organic materials such as livestock manure, straw, kitchen waste, etc. often contain high moisture content, which can affect the hardness and shape of the roller extrusion granulator granulation.
Bioactivity: These materials are rich in microorganisms and enzymes, which may affect the stability of granulation.
Processing strategy
Pre drying: Use a solid-liquid separator or dryer to reduce the moisture content of the raw materials in advance, with an ideal moisture content of around 10% to 15%.
Adding auxiliary materials: Adding appropriate amounts of moisture absorbing agents such as sawdust and rice husk powder can help absorb excess moisture and improve the granulation performance of the roller extrusion granulator.
Temperature regulation: Gentle heating helps activate microbial activity and accelerate biotransformation, but high temperatures should be avoided from damaging organic matter.
2. Dealing with inorganic raw materials
Feature recognition
Excessive hardness: Mineral materials such as phosphate and ammonium sulfate may have high hardness and are difficult to press into shape.
Chemical reaction: Some chemicals may react upon contact with air or moisture, producing gases or changing forms.
Processing strategy
Preprocessing: Reduce particle size through grinding, increase the surface area of the raw material, and facilitate compression.
Additives: Use adhesives such as bentonite and cellulose derivatives to increase the adhesion between particles.
Fine ingredients: precise measurement, avoiding chemical reactions, ensuring appropriate ingredient ratios, and maintaining formula balance.
3. Comprehensive raw materials
When processing organic and inorganic composite materials:
Feature recognition
Diversity: Complex components may increase the difficulty of granulation and affect consistency.
Chemical compatibility: Potential interactions between different components should be handled with caution.
Processing strategy
Comprehensive adjustment: Combining the processing methods of the two raw materials mentioned above, flexibly adjust the amount of water added, the amount of adhesive used, and equipment parameters.
Experimental verification: Conduct trial production for specific raw material combinations, test the optimal formula and process conditions.
Overall recommendations
Regardless of the type of raw material, maintaining uniform mixing, moderate moisture content, and suitable mechanical conditions are key. In addition, continuous monitoring and adjustment of parameters such as pressure, speed, and clearance of the rollers ensure stable and controllable production processes. Regular maintenance and cleaning of equipment is also crucial to maintain its optimal condition. Through in-depth understanding and reasonable processing of the characteristics of raw materials, the roller extrusion granulation machine can be effectively applied to the processing of various fertilizer raw materials, producing high-quality fertilizer granules that meet different needs.
