1. Project Overview
Location: USA
Material: Phenolic Resin – A vital thermosetting plastic widely used in molding compounds, coatings, and refractory materials.
Core Challenge: Phenolic resin has a low softening point and is highly flammable/explosive. During high-speed grinding, mechanical energy can easily convert to heat, causing the material to melt or clump. Additionally, high dust concentrations necessitate rigorous explosion-proof standards for the system.
Equipment: Epic Powder MJW Series Air Classifier Mill
2. Technical Parameters & Product Specifications
The production line achieved stable output at high capacity through high-volume air cooling and precision classification technology:
| Item | Technical Data |
| Final Fineness (D90) | 30μm |
| Hourly Capacity | 570kg/h |
| Equipment Type | Mechanical Impact Air Classifier Mill (MJW Series) |
| Safety Configuration | Inert Gas Protection / Automatic Explosion Relief System |
3. Project Highlights
A. Exceptional Temperature Control
Phenolic resin is extremely heat-sensitive. The MJW Air Classifier Mill features a high-volume air induction design that creates efficient heat exchange within the grinding chamber. By optimizing the rotor speed and air intake ratio, the system maintains the processing temperature well below the material’s softening point. This ensures excellent powder fluidity and effectively prevents wall-sticking or clogging during the phenolic resin ultra-fine pulverization process.
B. Industrial Large-Scale Output
While maintaining a precise ultra-fine fineness of D90 = 30μm, the system delivers a consistent hourly output. Epic Powder’s MJW series utilizes an enhanced rotor design to improve single-machine grinding efficiency, meeting the strict requirements for industrial-scale production demanded by the American client.
C. Stringent Safety Standards
To address the explosion risks associated with phenolic resin dust, the project integrated high-level safety defense systems. The equipment supports a closed-loop system that can be filled with Nitrogen (N2) as the grinding medium to isolate oxygen. Combined with explosion-proof valves, this ensures absolute safety during phenolic resin ultra-micro pulverization.
4. Process Flow
Automated Feeding: Granular phenolic resin is precisely fed into the chamber via a frequency-controlled feeding system.
Ultra-micro Pulverization: The high-speed rotating hammers and gear ring generate powerful impacts, instantly shattering the material.
Precision Classification: The integrated internal classifying wheel uses centrifugal force to filter the powder, allowing only the 30μm particles to pass.
High-Efficiency Collection: The final product is captured by a rear-end anti-static pulse jet collector, ensuring a recovery rate of over 99%.
5. Conclusion
The successful implementation of this project in the USA demonstrates that the Epic Powder MJW series has reached international leadership levels in processing flammable, low-melting-point, and heat-sensitive chemical materials. By accurately controlling the D90 at 30μm, the client’s phenolic resin powder exhibits superior uniformity and chemical activity for downstream molding and coating processes.