How Does the Double Roller Extrusion Granulation Process Work?

In the vast field of material processing, the double roller extrusion granulation process stands out for its efficiency and versatility. This method involves the transformation of powder into granules through the application of pressure and extrusion, without the need for any liquid binder. The process, often referred to as dry granulation or compaction, plays a pivotal role in various industries, including but not limited to pharmaceuticals, chemicals, and fertilizers.

The Core Mechanism Behind the Process

At the heart of the double roller extrusion granulation process lies the double roller extrusion granulator. This innovative piece of equipment compresses the raw material into a solid mass by passing it between two counter-rotating rollers. The force exerted on the material not only compacts it but also shapes it into granules of a predetermined size and density. Such a mechanism is crucial for ensuring uniformity and quality in the final product.

pellets extrusion machine
pellets extrusion machine

Key Components of the Double Roller Extrusion Granulation Line

A comprehensive dry granulation line encompasses several critical components, each playing a specific role in the process. The loader type feeder introduces the raw material into the system, ensuring a steady and controlled flow. The chain crusher then preliminarily crushes the material, preparing it for further processing. The horizontal mixer achieves a homogenous mix of the material, which is essential for consistent granule quality.

Following mixing, the material enters the core of the process, the double roller extrusion granulator. Here, the material is compacted and shaped into granules. Post-granulation, the rotary screening machine separates the desired granules from the undersized or oversized ones, which can be reprocessed. Finally, the automatic packaging scale accurately weighs and packages the granules, while belt conveyors facilitate the smooth transition of materials between each stage of the process.

Simple NPK Fertilizer Granulation Line
Simple NPK Fertilizer Granulation Line

Why Consider the Yushunxin Double Roller Extrusion Granulation Production Line?

Transitioning subtly to the merits of choosing a specific brand for this advanced granulation process, the Yushunxin double roller press granulation line emerges as a frontrunner. This line is renowned for its high efficiency, reliability, and adaptability to various raw materials, including but not limited to minerals, chemicals, and biomass.

The precision engineering behind each component ensures minimal downtime and maintenance, maximizing productivity. Moreover, the system’s design prioritizes energy efficiency, reducing operational costs for businesses. It is a testament to innovation in granulation technology, proving to be an invaluable asset for industries looking to optimize their material processing capabilities.

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The double roller extrusion granulation process represents a significant leap forward in material processing technology. Its ability to efficiently transform raw materials into compact, uniform granules without the need for liquid binders makes it an indispensable method in numerous sectors. The YSX granulation production line, with its sophisticated design and superior performance, stands as an exemplary choice for businesses aiming to leverage the full potential of this innovative process. Its contribution to enhancing productivity and reducing costs cannot be overstated, marking a new era in the field of granulation technology. You can visit:

How to use double roller granulator to make zeolite pellets

The process of pelletizing zeolite using a double roller granulator is a method favored for its low-energy consumption and absence of the need for drying or additional heat. Zeolites are microporous, aluminosilicate minerals commonly used as commercial adsorbents and catalysts. Here is a detailed guide on how you can use a double roller granulator to produce zeolite pellets.

Introduction to Double Roller Granulation

Understanding the Double Roller Granulator

A double roller granulator is a machine designed for the compacting and granulating of dry powder materials using mechanical pressure applied through two opposing rollers. The machine is widely used in the chemical, pharmaceutical, and food industries, and is particularly suitable for creating granules from materials that do not require a binding agent.

Preparing Zeolite Powder

Sourcing Quality Zeolite

The quality of the zeolite powder is crucial to the success of the granulation process. Source your zeolite from reputable suppliers to ensure it has the desired properties, such as pore size, surface area, and ion-exchange capacity.

Powder Preparation and Blending

Before feeding the zeolite powder into the double roller granulator, ensure it is finely ground and homogenized. If necessary, blend the zeolite powder with other components or additives that may improve the pellet quality or impart additional desired properties.

The Granulation Process

Feeding the Material

The zeolite powder is fed into the hopper of the double roller granulator, where it will be directed between two rotating rollers. The powder should be fed consistently to maintain a uniform flow and ensure consistent pellet size.

Roller Compaction and Granule Formation

As the powder passes through the rollers, it is compacted under high pressure, causing the particles to adhere to each other and form flakes or sheets. These sheets are then milled or broken down into the desired pellet size.

Besides this granulator, we can also offer disc granulation machinery and rotary drum pelletizer machine for you.

Post-Granulation Processing

Sizing and Quality Control

The pellets are then sized to ensure uniformity. Any fines or oversized pellets that are produced can be reprocessed, ensuring minimal waste. Quality control measures should be in place to check the hardness, integrity, and composition of the zeolite pellets.

Optional Coating Process

In some cases, a coating may be applied to the pellets to provide additional benefits such as controlled release of the zeolite’s properties, dust reduction, or to act as a protective barrier against moisture and other environmental factors.

Packaging and Storage

Packaging for Distribution

Once the zeolite pellets have passed quality control, they are packaged in materials that are compatible with zeolite and suitable for transportation. Common packaging options include bags, drums, or super sacks, depending on the quantity and intended use.

Storing Zeolite Pellets

Storage of zeolite pellets should be in a dry, well-ventilated area to maintain their quality. Since zeolites are hygroscopic, they should be protected from exposure to moisture to preserve their adsorptive properties.

Environmental and Safety Considerations

Safety Precautions

Operators of the double roller granulator should adhere to safety guidelines to prevent accidents. Personal protective equipment (PPE) such as gloves, masks, and safety goggles should be worn due to potential dust generation during the granulation process.

Environmental Impact and Disposal

The process of granulating zeolite is environmentally friendly since it does not typically require additional chemicals or solvents. However, any waste material should be disposed of in accordance with local environmental regulations.


The use of a double roller granulator for making zeolite pellets is an efficient and environmentally friendly process. It allows for precise control over pellet size and density, which is essential for the consistent performance of zeolite in its various applications. By following the steps outlined above, manufacturers can ensure high-quality zeolite pellets that meet industry standards and user requirements. And if you want to make zeolite pellets continuously, you can consider setting up a zeolite granulation plant.