In bulk solids processing, particle size has a direct impact on how materials behave during manufacturing, packaging, transport and end use. Powders that are too fine may create dust, segregate during handling or resist proper mixing. Materials that are too coarse may not dissolve, disperse or flow as intended.
Agglomeration is one of the most common methods used to improve these characteristics by enlarging and controlling particle size.
Used across the food, chemical, mineral and polymer industries, agglomeration helps manufacturers improve product performance, process efficiency and handling characteristics while creating a more consistent final product.
What Is Agglomeration?
Agglomeration is the process of combining smaller particles into larger, more controlled structures such as granules, pellets, briquettes or compacted flakes.
Depending on the application, agglomeration can be used to:
- Reduce dust generation
- Improve flowability
- Increase bulk density
- Improve dispersibility or solubility
- Prevent ingredient segregation
- Improve handling and packaging
- Create a more uniform particle size distribution
In many applications, agglomeration is not simply about making particles larger, it is about engineering the particle to behave in a specific way during downstream processing or end use.
Why Particle Size Matters
Particle size influences nearly every stage of solids processing.
For example, in food processing, particle size can affect:
- Mix consistency
- Rehydration behavior
- Consumer experience
- Dust control
- Packaging efficiency
In chemical and mineral applications, particle size may impact:
- Flow through hoppers and feeders
- Conveying performance
- Reaction rates
- Storage stability
- Transport efficiency
Even relatively small changes in particle size distribution can significantly alter how a material performs within a process.
Common Types of Agglomeration
There are several methods used to agglomerate bulk solids, each producing different particle characteristics.
Pressure Agglomeration
Pressure agglomeration uses mechanical force to compact material into larger shapes or flakes. This approach is commonly used in:
- Roll compaction
- Briquetting
- Tableting
Pressure agglomeration is often selected when high-density, durable particles are required.
Wet Agglomeration
Wet agglomeration combines powders with a liquid binder to form granules. This method is frequently used when producing:
- Instantized powders
- Fertilizers
- Feed additives
- Protein ingredients
- Specialty chemicals
The resulting granules are often more dispersible and easier to handle than the original fine powders.
Extrusion Agglomeration
Extrusion processes force material through a die to create pellets or shaped particles. This method is commonly used for:
- Feed products
- Biomass materials
- Specialty chemical granules
- Industrial byproducts
Agglomeration and Downstream Performance
One of the most important considerations in agglomeration is how the final particle will perform after processing.
For example:
- A particle that is too soft may break down during conveying
- A particle that is too hard may not dissolve properly
- A particle that is too fine may create dust or segregation issues
- A particle that is too porous may create handling challenges
This is why agglomeration development often involves testing and process refinement to balance particle size, density, strength and moisture characteristics.
Selecting the Right Agglomeration Approach
There is no single agglomeration solution for every material.
The right process depends on factors such as:
- Feed consistency
- Moisture content
- Desired particle size
- Density requirements
- Solubility or dispersibility goals
- Product strength requirements
- Downstream handling considerations
Because materials respond differently during processing, bench and pilot-scale testing are often critical steps in determining the best approach.
Interested in a Deeper Technical Breakdown?
Agglomeration can influence everything from product quality and flowability to process efficiency and downstream performance.
For a more detailed look at agglomeration methods, particle behavior and process considerations, download our white paper:
Introduction to Particle Agglomeration
