Graphite Rolls
High-Performance Graphite Rolls for Industrial Applications
Graphite rolls are essential components in various high-temperature industrial processes. Our premium-grade graphite rolls deliver exceptional thermal conductivity, chemical resistance, and mechanical strength for demanding applications including heat treatment, glass manufacturing, and metal processing.
Key Specifications and Technical Parameters
- Material Composition: High-purity isotropic graphite (99.9% carbon content)
- Density: 1.75-1.85 g/cm³
- Compressive Strength: ≥ 70 MPa
- Flexural Strength: ≥ 40 MPa
- Thermal Conductivity: 80-120 W/mK
- Maximum Operating Temperature: 3000°C in inert atmosphere
- Coefficient of Thermal Expansion: 4.5-5.5 ×10-6/°C
| Model | Diameter (mm) | Length (mm) | Tolerance | Surface Finish |
|---|---|---|---|---|
| GR-50 | 50-150 | 500-2000 | ±0.05mm | Ra 0.8μm |
| GR-100 | 100-300 | 1000-3000 | ±0.1mm | Ra 1.6μm |
| GR-200 | 200-500 | 2000-5000 | ±0.15mm | Ra 3.2μm |
Graphite Rolls - Frequently Asked Questions
What are the primary advantages of using graphite rolls compared to metal rollers?
Graphite rolls offer superior thermal stability, withstanding temperatures up to 3000°C without deformation. They provide excellent thermal shock resistance, chemical inertness to most molten metals and salts, and maintain dimensional stability under extreme conditions. Unlike metal rollers, graphite doesn't require water cooling in most applications, reducing energy consumption and maintenance costs.
How should graphite rolls be stored when not in use?
Graphite rolls should be stored in a dry, dust-free environment at room temperature. Avoid direct contact with moisture or corrosive chemicals. For long-term storage, wrap rolls in protective plastic film and place them horizontally on padded racks to prevent deformation. The storage area should maintain relative humidity below 60% and temperature between 15-30°C.
Customization Options
We offer tailored solutions to meet specific operational requirements:
- Custom diameters from 20mm to 800mm
- Special surface treatments (glazing, coating, or grooving)
- Precision machining for tight tolerance applications
- Composite structures with reinforced cores
- Various graphite grades (fine, medium, coarse grain)
Graphite Rolls - Additional Common Questions
What maintenance procedures are required for graphite rolls?
Graphite rolls require minimal maintenance compared to metal alternatives. Regular inspection for surface wear and dimensional accuracy is recommended. Cleaning should be done with compressed air or soft brushes - avoid abrasive materials. For applications involving molten metal, periodic surface polishing may be needed. Proper alignment and controlled heating/cooling rates significantly extend service life.
Performance Comparison
| Feature | Graphite Rolls | Steel Rolls | Ceramic Rolls |
|---|---|---|---|
| Max Temperature | 3000°C | 600°C | 1600°C |
| Thermal Shock Resistance | Excellent | Poor | Good |
| Chemical Resistance | Superior | Limited | Good |
| Service Life | 12-24 months | 3-6 months | 6-12 months |
Our graphite rolls undergo rigorous quality control, including ultrasonic testing, dimensional verification, and thermal performance evaluation to ensure consistent quality across all production batches.