8 mesh 16 mesh Calcined Flint Clay Heat Preservation Heat Insulation
3-1mm Grain Size Calcined Flint Clay Calcined Kaolin 45% For Aluminum Silicate Refractory Fiber Production
1. Calcined Flint Clay Introduction
Calcined flint clay, high quality hard refractory clay. The Al2O3 content in the standard calcined flint clay ore is 38%, about 44% after calcined, and the Fe2O3 content is less than 2%. Stable composition, uniform texture, dense structure, section was shell-like, white, used for the production of high quality clay refractories. The term is “the first grade hard clay clinker”, with main chemical composition of AL2O3 and SiO2, accompanied by a small amount of Fe2O3 and trace Na2O, K2O, the main mineral is kaolin.
2. Calcined Flint Clay Specifications
| Item/Grade | FC45 | FC44 | FC43 | FC42 | FC40 |
| AL2O3 % | 46-48 | 44-48 | 43-48 | 42-46 | 40-46 |
| SiO2 % | 49-52 | 50-53 | 50-53 | 50-53 | 50-54 |
| Fe2O3 % (max) | 1.0 | 1.3 | 2.0 | 2.5 | 3.0 |
| Ti02 % (max) | 0.8 | 0.9 | 1.0 | 1.1 | 1.2 |
| K2O+Na2O % (max) | 0.3 | 0.4 | 0.4 | 0.5 | 0.5 |
| Ca0+Mg0 % (max) | 0.5 | 0.5 | 0.5 | 0.6 | 0.7 |
| Bulk density g/cm³(min) | 2.58 | 2.52 | 2.45 | 2.40 | 2.37 |
| Refractoriness °C(min) | 1780 | 1760 | 1740 | 1720 | 1710 |
| Impurities % (max) | 0.5 | 2.0 | 3.0 | 3.5 | 4.0 |
3. Calcined Flint Clay General advantages
- High refractoriness.
- Stable physical characteristics.
- High bulk density.
- Low porosity.
- Low water absorption.
- Completely calcined evenly.
- Low impurity contents.
4. Calcined Flint Clay Characteristics
- High refractoriness.
- Physicochemical stability.
- Bulk density high.
- Low porosity.
- Low water absorption.
- Fully calcined
- Low impurity content.
- Pure white.
5. Calcined Flint Clay Particle sizes Available
- Size of sand: 8-16,16-30,30-60,30-80,60-80,80-120 (mesh):Used for investment casting.
- Size of powder: -200mesh,-270mesh,-325mesh: Used for investment casting and refractories.
- Size of particle: 0-1mm,1-3mm,3-5mm,5-8mm,8-15mm,0-5mm,0-50mm:Used for refractories.
6. Calcined Flint Caly Application
Refractory clay is mainly used for manufacturing high-quality refractory products, refractory castable, sagger, kiln furniture, crucibles, ceramic fiber, precision casting sand, ceramics products, etc.
1. Heat insulation
2. heat preservation
3. low water absorption
4. construction easily
5. Good work ability
6. Strong adhesive power
Size of powder: -200mesh,-270mesh,-325mesh
Used for investment casting and refractories.
Size of particle: 0-1mm,1-3mm,3-5mm,5-8mm,8-15mm,0-5mm,0-50mm
Used for refractories.
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