Roller extrusion granulator and drum granulator are two commonly used fertilizer granulation processes that play an important role in organic fertilizer production lines. Both have their own unique design principles and applicable scenarios. Below is a detailed introduction to their characteristics to help you make a choice based on specific needs.
Roll squeezing granulator
characteristic:
High pressure forming: By using two relatively rotating rollers in a roller extruder, the material is compressed under high pressure and extruded through the gap between the rollers to form particles. The particle density generated during this process is high and not easily broken.
Wide applicability: It can handle various organic, inorganic, and composite materials, especially suitable for granulation of difficult to bond or lightweight materials, such as certain minerals, chemical raw materials, and organic fertilizers.
Clean and environmentally friendly: There is no need to add additional water or adhesives during the granulation process, reducing the cost of wastewater discharge and subsequent drying.
Controllable size: The particle size can be easily controlled by adjusting the distance between the rollers, making it widely applicable.
characteristic:
Drum rotation: The material inside the rotating drum is subjected to gravity and friction, slowly rolling and gathering into a ball, suitable for processing materials with certain viscosity or humidification.
Efficient production: The rotary drum granulator has a high production capacity and is suitable for large-scale industrial production. Due to its physical structure, it is conducive to large-scale continuous operation.
Uniform granulation: By controlling the filling rate and speed inside the drum, products with consistent particle size can be obtained, often in spherical or approximately spherical shapes.
Multifunctionality: Some models integrate multiple functions such as mixing, granulation, drying, etc., simplifying the production process.
Comparison between the two:
Roll extrusion granulator is more suitable for processing materials that are difficult to bond, while drum granulator is suitable for processing materials with certain viscosity;
The particle density produced by the roller granulator is higher, while the particles produced by the drum granulator tend to be naturally loose;
In terms of cost, the operating cost of the roller granulator is relatively low, but the initial investment may be higher than that of the drum granulator;
Drum granulators are more conducive to large-scale continuous production, while roller granulators have higher flexibility in handling specific materials.
The final selection of which type of granulator should take into account the characteristics of the production materials, production scale, cost budget, and requirements for the finished granules. In practical applications, detailed technical and economic analysis should also be conducted in conjunction with specific process flows to ensure that the selected equipment meets production needs and has good economic benefits.
