Kaolin, a crucial raw material for refractory products, requires precise particle size control to achieve optimal thermal stability and mechanical strength. The grinding process significantly impacts the final product’s performance in high-temperature applications (1,200-1,800°C). This article explores advanced milling solutions for kaolin refinement.
Raw kaolin typically contains 15-35% moisture with Mohs hardness 1.5-2.0. Refractory-grade kaolin demands:
| Parameter | Requirement |
|---|---|
| Particle Size | D90 ≤ 5μm |
| Al2O3 Content | >34% |
| Fe2O3 | <0.8% |
While cost-effective, ball mills struggle with:
Modern solutions like our SCM Ultrafine Mill offer superior performance:
| Feature | Advantage |
|---|---|
| Multi-layer grinding | Progressive size reduction |
| Turbo classifier | Precise particle cut-off |
| Ceramic wear parts | Iron contamination <0.01% |
Our flagship solution for high-purity kaolin processing:
| Model | SCM800 | SCM1250 |
|---|---|---|
| Capacity (t/h) | 0.5-4.5 | 2.5-14 |
| Power (kW) | 75 | 185 |
| Fineness (mesh) | 325-2500 (D97≤5μm) | |
The MTW Series Trapezium Mill combines thermal and mechanical processing:
| Stage | Temperature | Residence Time |
|---|---|---|
| Pre-drying | 120-150°C | 25-40s |
| Fine grinding | 80-100°C | 15-25s |
Our mills incorporate:
A refractory plant achieved:
| Metric | Before | After SCM1250 |
|---|---|---|
| Productivity | 3.2 t/h | 11.8 t/h |
| Energy Use | 48 kWh/t | 29 kWh/t |
For refractory-grade kaolin processing, our SCM and MTW series deliver unmatched precision and efficiency. The SCM1250 model particularly excels in large-scale operations requiring sub-micron particle distributions with minimal contamination.
