Roller-press fertilizer production line built by Huaqiang Heavy Industry in Malaysia

At an installation site in Yong Peng, Malaysia, a roller-press granulation line designed and manufactured by Huaqiang Heavy Industry stands out. Unlike traditional rotary drum or disc granulation processes, roller-press granulation utilizes a dry, ambient-temperature extrusion method; it produces granular fertilizer directly without the need for a drying stage—a technical feature that offers distinct advantages in tropical regions.

The production line features a scientifically sound process flow: an automatic batching system precisely weighs various raw materials according to the formula. After preliminary mixing in a horizontal ribbon mixer, the materials undergo secondary, fine mixing in a vertical disc mixer to ensure uniformity. The blended powder then enters the double roller-press granulator, where it is compressed into sheets by two counter-rotating, high-pressure rollers before being crushed into granules. The resulting granules are cooled and stabilized, then graded by a drum screener; qualified granules are sent for automatic weighing and packaging, while undersized or oversized material is returned to the front end via conveyor belt for re-granulation.
The granulator’s rollers are made of high-strength alloy with a specially treated surface, offering excellent wear resistance and enabling continuous, long-term operation. This process is suitable for granulating blends of various base fertilizers—such as urea, ammonium chloride, monoammonium phosphate (MAP), and potassium chloride—as well as for forming organic and bio-fertilizer granules, demonstrating broad raw material adaptability. By eliminating the large-scale drying systems required for traditional wet granulation, the line’s overall energy consumption is reduced by over 30%. The finished granules possess high strength and resistance to pulverization, making them ideal for long-distance transport and storage.
During the design phase, Huaqiang Heavy Industry fully accounted for the local hot and humid climate, optimizing key components—such as electrical control cabinets and motor bearings—for moisture resistance and heat dissipation to ensure stable operation in the Southeast Asian environment. The technical team also customized settings for roller clearance and extrusion pressure based on the client's specific raw materials, achieving an industry-leading pass rate for the finished granules.