Overview
Many powder processing applications require extremely tight moisture control to ensure consistent product performance and downstream processing. In these applications, even small variations in moisture content can affect product quality, handling characteristics, and manufacturing results.
This application required the accurate dispersion of a sodium silicate solution into a large volume of dry powders while maintaining a moisture tolerance of ±0.5%. Conventional batch mixing approaches often struggle to maintain this level of consistency and can introduce additional processing steps.
Challenges
Precise moisture control in powder processing presents several operational challenges:
- Maintaining moisture content within narrow product specifications
- Evenly dispersing small amounts of liquid into large volumes of powder
- Avoiding moisture gain or loss during mixing
- Eliminating lengthy batch mixing cycles
- Reducing energy consumption associated with slurry processing and drying
- Minimizing off-spec material during startup and shutdown
- Producing material suitable for downstream equipment
These challenges directly affect product consistency, throughput, and manufacturing costs.
Solutions
A Continuous Processor was implemented to provide accurate liquid dispersion and tight moisture control during powder blending.
Key elements of the solution included:
- Continuous mixing with short residence time
- Precise introduction of sodium silicate solution into dry powder
- Rapid generation of a well-dispersed product stream
- Controlled processing conditions to maintain moisture specifications
- Customized paddle arrangement for effective blending
- Low-moisture processing without creating a slurry
- Direct transfer capability to downstream operations
The system produced a steady stream of material while maintaining moisture content within specification throughout the process.
Results
Implementation of the continuous processing system delivered measurable benefits:
- Moisture control maintained within ±0.5% specification
- Uniform dispersion of liquid into dry powders
- Reduced energy consumption compared to slurry-and-dry methods
- Minimal scrap generated during process interruptions
- Consistent granular product formation
- Reduced processing steps
- Direct feeding capability to tablet presses and other downstream equipment
Overall, the system provided accurate moisture management while supporting efficient continuous production
Related Solutions
- Continuous mixing and processing systems for controlled powder conditioning
- Particle size reduction systems for preparation of powders and dry ingredients
- Screening systems for final product classification and quality control
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