Furnace Types
Furnace Types — Vertical, Rotary & Fluidized Furnaces
Perlite expansion furnaces heat ore to 850–1,100°C, causing bound water to vaporize and expand the glass. Furnace type determines PSD, density, and energy efficiency.
1. Furnace Types
1.1 Vertical Furnaces
Most common type, offering high throughput and resulting in a coarse PSD.
1.2 Rotary Furnaces
Provides uniform heating, high control, and produces a fine PSD.
1.3 Fluidized Bed Furnaces
Features high energy efficiency, uniform expansion, and very fine PSD.
2. Furnace Comparison
| Furnace | PSD | Density | Efficiency |
|---|---|---|---|
| Vertical | Coarse | Medium | Medium |
| Rotary | Medium | Low | Medium |
| Fluidized | Fine | Very low | High |
3. Key Furnace Parameters
- Temperature profile
- Residence time
- Airflow
- Burner type
4. Impact on Final Product
- Density
- Porosity
- Whiteness
- Strength
5. Geological Influence
High-alkali ores expand better in rotary and fluidized systems.
6. Regional Furnace Use
Turkey: Vertical
USA: Rotary
Iran: Mixed
7. FAQ
Q: Which furnace gives the lowest density?
Fluidized.
Q: Which gives the coarsest PSD?
Vertical.
