Ultra-Fine Wet Stirring Mill
The Ultra-Fine Wet Stirring Mill is a specialized grinding system for producing ultrafine particle slurries in wet processing environments. Unlike dry grinding mills, this stirred media mill uses small-diameter grinding beads agitated by a rotating stirrer shaft to achieve sub-micron particle sizes in liquid suspension. It is the preferred equipment for paint, ink, coating, and chemical manufacturers who require ultrafine, stable dispersions. The mill's high-energy stirring mechanism and small bead size deliver exceptional grinding efficiency for wet processing, achieving particle sizes that are impractical with dry grinding systems.
Working Principle
The mill consists of a cylindrical chamber filled with small grinding beads (0.3-3mm diameter) and the liquid slurry to be ground. A central rotating stirrer shaft with pegs or discs agitates the beads at high velocity. The rapidly moving beads generate intense shear and impact forces that reduce particle size through attrition. The chamber is cooled by a water jacket to manage heat generation. Ground slurry exits through a separation screen that retains beads while allowing the liquid product to pass through.
The grinding process is precisely controlled by the integrated classification system, which separates qualified fine powder from coarse particles. Coarse particles fall back to the grinding chamber for regrinding, while fine powder is conveyed by airflow to the cyclone collector and then to the finished product silo. This closed-circuit design ensures consistent product quality and high grinding efficiency.
Key Features & Advantages
Sub-Micron Grinding
Achieves particle sizes down to 100 nanometers in liquid suspension, impossible with dry grinding systems.
High-Energy Stirring
Central stirrer shaft with optimized peg/disc arrangement delivers maximum energy transfer to grinding beads.
Cooled Chamber
Water-jacketed grinding chamber manages heat generation, critical for temperature-sensitive materials and preventing solvent evaporation.
Bead Retention Screen
Precision separation screen retains beads while allowing ground slurry to exit, preventing contamination of product.
Applications & Industry Use
This equipment is widely used across multiple industries for various powder processing applications:
- Paint and coating dispersion
- Ink manufacturing
- Chemical slurry processing
- Pharmaceutical suspension preparation
- Ceramic slurry production
- Mineral slurry grinding
Processable Materials
The versatile design of this equipment allows it to process a wide range of non-metallic minerals and industrial materials. Below are some of the most commonly processed materials. For detailed grinding solutions for each material, please visit our materials page.
Technical Specifications
The following table provides detailed technical parameters for each model in this product series. These specifications are based on standard configurations and may vary depending on material properties and specific application requirements. Contact our engineering team for customized configurations.
| Model | UW-S | UW-M | UW-L |
|---|---|---|---|
| Chamber Volume (L) | 15-50 | 50-200 | 200-1000 |
| Output Size | Sub-micron | Sub-micron | Sub-micron |
| Bead Size (mm) | 0.3-3 | 0.3-3 | 0.3-3 |
| Power (kW) | 5.5-15 | 15-55 | 55-160 |
Performance & Efficiency
The Ultra-Fine Wet Stirring Mill is designed for maximum grinding efficiency and energy savings. The optimized grinding chamber geometry, combined with high-precision classification, ensures that energy is used effectively for particle size reduction rather than wasted on over-grinding or heat generation. Compared to conventional milling systems, our equipment typically achieves 20-30% lower power consumption per ton of finished powder.
Key performance metrics include stable fineness control with deviation less than 5%, low noise levels below 75 dB at 1 meter distance, and dust emissions below 20 mg/m3 when equipped with our pulse bag filter system. These performance characteristics make our equipment suitable for even the most demanding industrial environments and stringent environmental regulations.
Installation & Commissioning
Proper installation is critical for optimal equipment performance and longevity. Our experienced engineers provide on-site installation and commissioning services, including equipment positioning, alignment, electrical connection, piping installation, and system integration. The typical installation timeline ranges from 15 to 45 days depending on equipment model and production line complexity.
During commissioning, we conduct comprehensive performance tests including no-load test, load test, and production trial runs. We verify all performance parameters meet design specifications, calibrate control systems, train your operators on proper operation and maintenance procedures, and deliver a complete commissioning report with all test data.
Frequently Asked Questions
Any material that can be dispersed in a liquid can be ground: calcium carbonate in water, titanium dioxide in solvent, iron oxide in resin, etc. The key requirement is that the material forms a pumpable slurry.
Depending on material hardness, starting size, and bead type, particles can be reduced to 100 nanometers or finer. The practical limit is often determined by the application rather than the equipment.