Kaolin beneficiation involves removing impurities like quartz, feldspar, and iron oxides to improve whiteness and particle size distribution. The process typically includes crushing, grinding, classification, magnetic separation, and drying. Key equipment includes jaw crushers, ball mills, hydrocyclones, and high-gradient magnetic separators.
1. Primary Jaw Crusher:
– Model: PE600×900
– Feed size: ≤500mm
– Capacity: 50-160t/h
2. Secondary Cone Crusher:
– Model: CS160
– Output size: ≤38mm
– Capacity: 110-250t/h
3. Tertiary VSI Sand Maker:
– Model: VSI1140
– Max feed size: 50mm
– Capacity: 60-280t/h
| Product | Size (mm) | Clay Content (%) |
|---|---|---|
| Coarse Sand | 1-3 | <0.5 |
| Fine Sand | 0.1-0.5 | <0.3 |
| Ultrafine Powder | <0.045 | <0.1 |
Q1: How to reduce iron content in kaolin?
A: Use high-intensity magnetic separators (>1.2T) or chemical bleaching.
Q2: What’s the optimal moisture content for drying?
A: 8-12% for most industrial applications.
A Guangdong kaolin plant achieved 92% whiteness (ISO brightness) after upgrading their system with:
– Primary crushing: PE750×1060 jaw crusher
– Secondary grinding: Φ3.2×13m ball mill
– Classification: 12-inch hydrocyclone cluster
Annual output
