Bulk density high Calcined Clay Powder White 2000 Degree Refractoriness
Quality Calcined Flint Clay Kaolin for Refractories or Foundry Casting Investment
1. Calcined Flint Clay Introduction
Flint Clay is a kind of high quality hard refractory clay. The raw ore is gray and gray black, with fine structure and high hardness. It is not dispersed in water and has low plasticity. It's formed by the calcination of the pyrogemite ore at high temperature. The content of Al2O3 in the calcined pyrogem is about 44%, and the content of Fe2O3 is not more than 2%.Stable composition, uniform texture, compact structure, low water absorption, shell shaped section, white, and used to produce high quality clay refractory. The technical term is grade I hard clay clinker, the main chemical components are Al2O3 and SiO2, and a small amount of Fe2O3 and trace of Na2O and K2O are 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 Applications
Calcined flint clay is mainly used for manufacturing high-quality refractory products, refractory castables, sagger, kiln furniture, crucibles, ceramic fiber products, precision casting sand, ceramics products, etc.
6. 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.
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