What this equipment does
Coal crushers reduce run-of-mine coal to the size required by downstream processes such as screening, washing, pulverizing, or load-out. Common types in coal service include roll crushers (single-roll and double-roll), sizers (typically twin-shaft), hammer mills, and impact crushers. Roll crushers and sizers are preferred for soft to medium-hard coals because they minimize fines generation, while hammer and impact mills are used where finer product sizes are acceptable. The crusher choice is dictated by feed top size, required product size, hardness, moisture content, and capacity.
- Equipment Type
- Coal crusher
- Material Handled
- Run-of-mine coal, washed coal, middlings
- Capacity Range
- 50–3,000 tph
Common Applications
Technical Specifications
| Specification | Value | Unit |
|---|---|---|
| Capacity | 50–3,000 | tph |
| Feed Top Size | up to 1,500 | mm |
| Reduction Ratio | 3:1 to 10:1 | |
| Crusher Types | Roll, sizer, hammer, impact | |
| Motor Power | 55–800 | kW |
| Typical Product | 0–50 mm to 0–200 mm |
Selection Factors
- Feed top size and product top size
- Coal hardness (HGI) and abrasiveness
- Moisture content (sticky vs free-flowing)
- Acceptable fines generation
- Required capacity and duty cycle
- Installation envelope and headroom
Maintenance and Wear Notes
Crusher maintenance is dominated by wear-part replacement: hammers, roll segments, sizer picks, breaker bars, and screen bars. Wear life is heavily affected by coal abrasiveness and the proportion of contamination (rock, tramp metal). Tramp-metal detection and bypass chutes upstream are important to avoid catastrophic damage.