2026-11-09
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Laiyang is a major agricultural city in Shandong Province, with large-scale fruit and vegetable planting and livestock breeding, resulting in a strong demand for organic fertilizer. A local organic fertilizer company previously had powder fertilizer and disc granulation lines, but disc granulation requires high material moisture content and necessitates drying, leading to high energy consumption. To reduce production costs and enrich its product line, the company decided to introduce Huaqiang Heavy Industry's roller granulation production line to produce granular fertilizer using a dry extrusion process.
This production line was designed as a complete set by Huaqiang Heavy Industry. The core component is 4 roller granulators, complemented by a semi-wet material crusher, a twin-shaft mixer, a drum screen, and an automatic packaging machine. The roller granulators employ a room-temperature dry extrusion process, directly pressing powdery materials into shape through two opposing rotating high-pressure rollers. No water addition or drying is required, resulting in granules with high compressive strength and resistance to breakage. With all 4 machines operating in parallel, the hourly output can reach 8-12 tons, meeting the needs of large-scale production. Considering the high fiber content of organic fertilizer raw materials in Laiyang, Huaqiang Heavy Industry optimized the roller skin material and ball socket design, achieving a stable granulation rate of over 85% and extending die life by 30%.

Compared to disc granulation and drum granulation, the biggest advantage of roller extrusion granulation is its shorter process and lower energy consumption. The entire line requires no drying or cooling, consuming only 8-15 kWh per ton of fertilizer, resulting in significantly lower investment and operating costs compared to wet granulation. The finished granules are oblate or pillow-shaped. Although their appearance is not as round as disc granules, they have high strength and good flowability, making them suitable for mechanized fertilization and long-distance transportation. For the granulation of organic fertilizer, BB fertilizer, and potash fertilizer, roller granulation is a highly cost-effective choice.
After the roller granulation production line is put into operation, it can convert local livestock and poultry manure and straw in Laiyang into commercial granular organic fertilizer for use in the planting of crops such as apples, pears, and vegetables. For customers, the parallel operation of four roller granulators ensures production capacity while retaining the flexibility of independent start-stop operation for each machine, allowing for flexible adjustment of the number of machines in operation based on order volume. Huaqiang Heavy Industry's complete solutions, centered on roller granulators, are providing more and more organic fertilizer companies with a low-energy, high-return granular fertilizer production path.