Advanced vertical roller mill technology for energy-efficient cement grinding. Achieve 30% lower power consumption compared to traditional ball mills with integrated drying capability.
The vertical cement mill (also known as Vertical Roller Mill or VRM) is the modern standard for cement raw material and clinker grinding. Unlike horizontal ball mills that rely on tumbling media, the VRM uses a rotating grinding table and hydraulically-loaded rollers to crush material through compression and shear forces.
LIMING vertical mills handle feed sizes up to 1100mm directly, eliminating the need for pre-crushing. The integrated hot gas system enables simultaneous grinding and drying, processing materials with up to 20% moisture content without additional drying equipment. This makes the VRM particularly effective for grinding slag, fly ash, and blended cements.
| Quick Specifications | |
|---|---|
| Feed Size | ≤1100 mm |
| Capacity | 50-250 t/h |
| Power Consumption | ~28 kWh/t |
| Product Fineness | 3,300-4,800 cm²/g |
| Max Feed Moisture | 15-20% |
| Number of Rollers | 2-4 (dependent on model) |
| Table Diameter | 2,000-5,600 mm |
| Installation | Vertical, compact footprint |
Vertical roller mills deliver significant energy savings across every parameter
| Parameter | Vertical Mill (VRM) | Ball Mill | Savings |
|---|---|---|---|
| Power Consumption | 28 kWh/t | 41 kWh/t | 31.7% |
| Drying Capacity | Up to 20% moisture | 3-5% moisture | Integrated |
| Feed Size | ≤1100mm | ≤25mm | No pre-crushing |
| Floor Space | ~40% less | Baseline | Compact |
| Noise Level | <80 dB(A) | 85-100 dB(A) | Lower noise |
| Wear Rate | 5-8 g/t | 30-50 g/t | 80% less wear |
Why vertical roller mills outperform traditional grinding technologies
Operating at approximately 28 kWh/t, the VRM consumes 30% less electrical energy than a ball mill (41 kWh/t). For a 200 t/h plant, annual savings exceed 20 million kWh.
Vertical design requires approximately 40% less floor space than an equivalent ball mill system. Lower civil construction costs and easier integration into existing plants.
Hot gas from the kiln or auxiliary heater passes through the mill, drying materials with up to 20% moisture during the grinding process. No separate dryer required.
Accepts feed material up to 1100mm directly, eliminating the need for secondary/tertiary crushing stages. Reduces upstream equipment investment.
Operating noise below 80 dB(A) compared to 85-100 dB(A) for ball mills. Reduced vibration through hydraulic roller suspension and vibration monitoring systems.
Adjustable classifier speed and hydraulic pressure allow rapid transitions between different cement types (OPC, PPC, slag cement) with minimal downtime.
LIMING's proprietary vertical roller mill series. Available in models from LM130 to LM240 with capacities of 50-200 t/h. Features modular roller design for easy maintenance and quick roller replacement.
Robust mill design ideal for high-moisture and abrasive materials. Three-roller configuration with spherical roller bearings. Proven in slag grinding applications with 500+ installations worldwide.
Advanced vertical mill for finish cement grinding with the industry's lowest power consumption. Features flat grinding table, optimized roller profile, and integrated high-efficiency separator for 3,500-5,000 Blaine cement.
| Model | Table Diameter (mm) | Roller Qty | Feed Size (mm) | Moisture (max) | Capacity (t/h) | Motor (kW) | Fineness (cm²/g) |
|---|---|---|---|---|---|---|---|
| LM130 | 1300 | 2 | ≤38 | ≤15% | 10-30 | 200 | 3500-4800 |
| LM150 | 1500 | 2 | ≤40 | ≤15% | 16-40 | 280 | 3500-4800 |
| LM170 | 1700 | 2 | ≤42 | ≤15% | 20-50 | 400 | 3500-4800 |
| LM190 | 1900 | 3 | ≤45 | ≤15% | 25-70 | 500 | 3500-4800 |
| LM220 | 2200 | 3 | ≤50 | ≤15% | 35-100 | 710 | 3500-4800 |
| LM240 | 2400 | 3 | ≤55 | ≤15% | 50-150 | 1000 | 3500-4800 |
| LM280 | 2800 | 4 | ≤60 | ≤15% | 70-180 | 1400 | 3500-4800 |
| LM340 | 3400 | 4 | ≤80 | ≤15% | 90-220 | 1800 | 3500-4800 |
| LM400 | 4000 | 4 | ≤100 | ≤15% | 120-250 | 2200 | 3500-4800 |