2026/03/26
The dry granulation process employed by the double roller press granualtor is a method of forming granules at ambient temperature through the application of mechanical pressure. It requires no water addition, no binding agents, and no drying treatment; consequently, it is widely utilized in fertilizer production and offers distinct comprehensive advantages.
First, production costs are low, and the process flow is simple. Dry granulation eliminates the need for auxiliary equipment such as dryers and coolers, resulting in a roller press granulator produciton line with a small footprint and low initial investment. The production process requires no added water or auxiliary materials, thereby conserving water and reducing raw material costs. With no drying stage involved, energy consumption is drastically reduced, leading to significant electricity savings and lower operating expenses—making it ideally suited for large-scale production in small to medium-sized fertilizer plants.
Second, it effectively preserves nutrients and biological activity. The process utilizes ambient-temperature extrusion molding, ensuring that material temperatures remain low; this prevents the degradation of organic matter, humic acids, and beneficial live microorganisms. Consequently, the survival rate of microbial strains remains high, nutrient loss is avoided, and the overall fertilizer efficacy is enhanced. The resulting product boasts high purity and is free from external impurities, thereby meeting the production requirements for ecological agriculture, organic fertilizers, and bio-fertilizers.
Furthermore, the granules exhibit high quality and deliver excellent performance in application. The extruded granules possess high hardness and excellent density; they are resistant to crushing and caking, and they demonstrate strong flowability, facilitating ease of storage, transportation, and mechanized spreading. The granules are uniform in size, the molding rate is high, the volume of returned material is minimal, and material utilization efficiency is maximized—all of which contribute to superior production efficiency.
Finally, the process offers a wide scope of application and outstanding environmental performance. It is capable of processing a diverse range of dry powder raw materials and is compatible with various substances, including compound fertilizers, organic fertilizers, and mineral powders. The production operation is fully enclosed, generating no wastewater or exhaust gas emissions; furthermore, dust is easily collected and treated, ensuring full compliance with environmental protection standards. The system is simple to operate and maintain, requires minimal manual labor, and offers stable, reliable performance.
