Double roller press granulator is an important equipment in extrusion granulation production. It not only can make organic fertilizer, but also can produce compound fertilizer. Wide adaptability for raw materials, such as fertilizer, feed, chemical industry, and especially good adaptability for rare earth, metallurgy, coal, biological agent, environmental protection project.
Roller extrusion granulator extrudes powdered fertilizer with water content less than 5% into flake products with thickness of 5-20 mm. Then qualified granular fertilizer is obtained by crushing and screening. The screened powder is returned to granulator for granulation.
Advantages of roller press granulator in producing compound fertilizer
Compound fertilizer does not need drying treatment in the early stage, the moisture content of materials is low, and the acidic substances produced in the process are less, so the corrosion is lighter.
The extrusion process of roll pelletizing is a physical process, which is especially suitable for processing heat sensitive materials and saves investment and energy consumption.
The granulation process is carried out under dry conditions. The wastewater is discharged without chemical pollution.
The extrusion process can produce fertilizers with higher density than general compound fertilizers, and add organic fertilizers and other nutrients to raw materials as needed.