Specialized grinding equipment for pulverized coal preparation in cement plants and thermal power stations. Safe, reliable, and energy-efficient coal grinding solutions.
The coal mill is a critical component in cement manufacturing, responsible for grinding raw coal into fine pulverized coal for injection into the kiln burner and calciner. Efficient coal grinding directly impacts fuel consumption, flame stability, and clinker quality. LIMING coal mills are engineered specifically for the demanding conditions of cement plant fuel preparation.
Our coal mills use hot gas (from the kiln exhaust or auxiliary hot gas generator) to simultaneously dry and transport the pulverized coal. This integrated approach eliminates the need for separate drying equipment and ensures consistent moisture content in the pulverized fuel, which is critical for stable kiln operation and optimal combustion efficiency.
| Quick Specifications | |
|---|---|
| Feed Size | <25 mm |
| Capacity | 3-40 t/h |
| Product Fineness | R200 = 10-20% |
| Feed Moisture | ≤15% |
| Product Moisture | ≤1% |
| Hot Gas Temperature | 200-350°C |
| Motor Power | 55-710 kW |
| Safety Standard | ATEX/NFPA compliant |
Traditional coal grinding solution with hot air sweeping through the mill to dry and transport pulverized coal simultaneously. Suitable for capacities of 3-25 t/h. Features robust construction with wear-resistant liners and grinding balls. Ideal for coal with moderate moisture content (≤8%). Compact layout with integrated classifier for consistent product fineness.
Modern vertical roller mill design optimized for coal grinding with capacities of 15-40 t/h. Handles feed moisture up to 15% with integrated hot gas drying. Lower power consumption (25-30% less than ball mill), smaller footprint, and quieter operation. Equipped with advanced hydraulic roller suspension and automatic wear compensation for consistent performance.
Hot gas (200-350°C) simultaneously dries and transports coal during grinding. Reduces product moisture to ≤1%, ensuring optimal combustion in the kiln burner.
Dynamic classifier with adjustable speed provides precise control of coal fineness. Maintain consistent R200 residue for stable kiln flame and complete combustion.
Heavy-duty manganese steel liners and high-chrome grinding media designed for abrasive coal. Extended service intervals reduce maintenance downtime.
Optimized grinding process with efficient classification reduces specific power consumption. Vertical coal mill models achieve 30% energy savings compared to ball mill types.
Continuous temperature monitoring at mill inlet, outlet, and bearing housings. Automated alarm and shutdown systems prevent overheating and thermal damage.
Handles anthracite, bituminous coal, lignite, and petcoke. Quick adjustment of classifier speed and grinding pressure enables fast fuel type changes.
Comprehensive safety systems protect personnel and equipment during coal grinding operations
Continuous carbon monoxide detection at mill outlet triggers alarms at 50ppm and automatic shutdown at 100ppm.
Rupture discs and explosion vents installed at strategic locations safely relieve pressure in the event of a deflagration.
N2 or CO2 injection system automatically activates to suppress combustion when CO or temperature thresholds are exceeded.
Multi-point temperature sensors monitor mill inlet, outlet, and bearing temperatures. Automatic shutdown above critical thresholds.
Infrared spark detectors in pneumatic conveying lines identify and extinguish ignition sources before they reach the dust collector.
Automatic water mist or dry chemical fire suppression system integrated with the plant fire alarm network for rapid response.
| Model | Type | Capacity (t/h) | Feed Size (mm) | Feed Moisture | Fineness (R200) | Motor (kW) | Weight (t) |
|---|---|---|---|---|---|---|---|
| φ1.7×2.5 | Air-Swept Ball | 3-5 | <25 | ≤10% | 10-20% | 55 | 18 |
| φ2.2×3.0 | Air-Swept Ball | 5-8 | <25 | ≤10% | 10-20% | 90 | 26 |
| φ2.2×4.4 | Air-Swept Ball | 8-12 | <25 | ≤10% | 10-20% | 110 | 35 |
| φ2.4×4.75 | Air-Swept Ball | 12-18 | <25 | ≤10% | 10-20% | 160 | 48 |
| φ2.6×5.25 | Air-Swept Ball | 18-25 | <25 | ≤10% | 10-20% | 220 | 62 |
| LM130M | Vertical | 15-20 | <25 | ≤15% | 10-20% | 200 | 38 |
| LM150M | Vertical | 20-28 | <25 | ≤15% | 10-20% | 280 | 52 |
| LM170M | Vertical | 25-35 | <25 | ≤15% | 10-20% | 400 | 68 |
| LM190M | Vertical | 30-40 | <25 | ≤15% | 10-20% | 560 | 82 |