Project Overview：
Client / Application Field:
A Korean new-energy materials company specializing in the production and R&D of high-performance hard carbon anode materials for lithium-ion batteries.
Challenge Objective:
To achieve ultrafine grinding of hard carbon anode materials to meet strict particle size specifications and optimize battery performance.
Key Particle Size Indicator (D50): 1.30 μm
Required Capacity: 60 kg/h
Core Equipment: Epic Powder MQW10 Jet Mill
Material Characteristics & Grinding Challenges
Hard carbon is widely regarded as a highly promising anode material for sodium-ion batteries and certain lithium-ion battery applications due to its excellent cycling stability and high initial coulombic efficiency.
Material Characteristics:
Hard carbon features a disordered structure, high hardness, and brittleness. Its powder characteristics require precise control to ensure uniformity and stability during slurry preparation and electrode coating.
Key Grinding Challenges:
- Ultrafine Particle Requirement:
Achieving a target D50 of 1.30 μm demands extremely high grinding efficiency and classification accuracy. - Avoiding Over-milling:
Strict control over particle size distribution is needed to minimize excess ultrafine particles, which can lead to overly large specific surface area that negatively impacts electrochemical performance and safety. - High-Purity Requirement:
Anode materials are highly sensitive to metallic contamination; therefore, the grinding system must be wear-resistant and contamination-free.
Solution: Epic Powder MQW10 Jet Mill
The Epic Powder MQW10 Jet Mill is a high-efficiency ultrafine grinding system developed specifically for fine chemicals and advanced materials.
Equipment Features & Advantages：
| Feature | Technical Description | Contribution to Hard Carbon Grinding |
|---|---|---|
| Jet Milling Principle | Uses high-velocity supersonic airflow to generate particle-particle collision and shear. | Enables self-grinding between particles, effectively preventing metal contamination and ensuring purity. |
| Integrated Classifier | High-efficiency dynamic classifier built into the grinding chamber. | Provides precise control of product D50 (1.30 μm) and efficiently removes coarse particles for a narrow particle size distribution. |
| High-Efficiency Design | Optimized airflow field for improved energy utilization. | Achieves ultrafine grinding while maintaining a stable high output of 60 kg/h. |
| Wear-Resistant Linings | Uses special ceramics or high-durability anti-wear materials. | Meets hard carbon’s stringent requirements for wear resistance and extends service life. |
Results
Equipment Model: Epic Powder MQW10
Actual Output: Consistently reached and exceeded the required 60 kg/h.
Product Quality: Measured product particle size maintained at D50 ≈ 1.30 μm with a concentrated size distribution.