Coal Products Guide
This page provides a clear, practical overview of common South African coal grades and size classifications, including approximate laboratory specifications, typical applications, and visual references.
RB Coal Grades (Export Thermal Coal)
RB1
Overview
RB1 is a premium-grade export thermal coal with high energy content and low impurities. It is widely traded internationally and used where efficiency and consistency are critical.
Approximate Lab Specs
- GCV (ADB): ± 6,000 kcal/kg
- Ash (ADB): ± 15%
- VM (ADB): ± 23–25%
- TM (ARB): ± 8–10%
- Sulphur: < 1.0%
Typical Usage
- Export power stations
- Industrial boilers requiring high efficiency
- International traders and utilities
RB2
Overview
RB2 is the most commonly traded export coal grade from South Africa, offering a strong balance between quality and cost.
Approximate Lab Specs
- GCV (ADB): ± 5,700 kcal/kg
- Ash (ADB): ± 19–21%
- VM (ADB): ± 23–25%
- TM (ARB): ± 8–10%
- Sulphur: < 1.0%
Typical Usage
- Export power stations
- Cement kilns
- Industrial steam generation
RB3
Overview
RB3 is a lower-grade export coal, often selected for cost-sensitive applications while still meeting export specifications.
Approximate Lab Specs
- GCV (ADB): ± 5,500 kcal/kg
- Ash (ADB): ± 23–25%
- VM (ADB): ± 23–25%
- TM (ARB): ± 8–11%
- Sulphur: < 1.0%
Typical Usage
- Export power stations (blended)
- Industrial users with flexible combustion systems
Domestic Thermal Coal
4,800 kcal/kg Coal
Overview
This grade is widely used in the South African domestic market and offers reliable performance at a competitive price point.
Approximate Lab Specs
- GCV (ADB): ± 4,800 kcal/kg
- Ash (ADB): ± 28–32%
- VM (ADB): ± 22–24%
- TM (ARB): ± 10–12%
- Sulphur: < 1.2%
Typical Usage
- Local power generation
- Industrial boilers
- Brickworks and lime plants
Note: All specifications are indicative and may vary by mine, seam, and beneficiation method. Final specifications to be confirmed by certified laboratory analysis.