August 18, 2025
Introduction
Kaolin, a naturally occurring hydrated aluminum silicate, is widely used in cosmetic formulations due to its exceptional oil absorption, soft texture, and skin-friendly properties. To meet the stringent quality requirements of cosmetic-grade kaolin, specialized grinding mills must achieve ultra-fine particle sizes (D97 ≤5μm) while maintaining chemical purity and crystalline structure integrity.
Cosmetic Industry Specifications
The cosmetic industry demands kaolin with:
- Particle size distribution: 325-2500 mesh (45-5μm)
- Iron content ≤0.5% to prevent discoloration
- Bacterial count <100 CFU/g
- Zero contamination from grinding media
Critical Grinding Technologies
1. Precision Size Control
Our SCM Ultrafine Mill features a vertical turbine classifier that achieves precise particle size cuts with the following advantages:
| Parameter |
Cosmetic Standard |
SCM800 Performance |
| D50 |
2-8μm |
3.2μm |
| D97 |
≤10μm |
4.8μm |
| +45μm |
≤0.1% |
0.05% |
2. Contamination Prevention
The MTW Series Trapezium Mill employs ceramic-lined grinding chambers and zirconia grinding rollers to eliminate metal contamination:
- Fe content increase <0.01ppm after grinding
- Special food-grade seals prevent lubricant leakage
- 316L stainless steel contact parts
Recommended Solutions
1. SCM Ultrafine Mill for Premium Formulations
Ideal for high-end cosmetic applications requiring 5-10μm particle sizes:
- Model SCM800: 0.5-4.5ton/h capacity with 75kW main motor
- Pulse dust collector with H13 HEPA filtration
- Isolated bearing design prevents grease contamination
2. MTW Series for Bulk Production
For large-scale production of 15-45μm kaolin powders:
- Model MTW215G: 15-45ton/h capacity with 280kW main motor
- Curved air duct reduces particle impact damage
- Integrated sterilization system (optional)
Quality Assurance
Our grinding systems incorporate:
- Online laser particle size monitoring
- Automated metal detection and ejection
- Clean-in-Place (CIP) capability
- GMP-compliant material handling
Case Study: Luxury Face Powder Production
A leading cosmetic manufacturer achieved:
- 98% particles between 3-15μm
- 30% energy reduction vs. jet milling
- Zero product recalls for contamination
