LUM Series Vertical Roller Mill
The LUM Series Vertical Roller Mill is LIMING's premium ultrafine grinding solution, designed for producers who demand the highest powder quality and precision. Featuring an advanced multi-head classifier system, the LUM mill achieves exceptional 2-micron particle content that exceeds conventional grinding equipment. Its vertical roller design delivers superior energy efficiency, producing powders from 400 to 3000 mesh with capacities ranging from 0.2 to 45 tons per hour. The LUM mill represents the cutting edge of grinding technology for high-end paint, premium paper coatings, specialty cosmetics, and advanced industrial applications where particle size distribution directly determines product performance.
Working Principle
Material is fed onto the center of the rotating grinding table, where it is captured between the table and hydraulically loaded rollers. The rollers compress and shear the material against the table surface, reducing it to fine powder. Ground material is swept upward by a controlled air stream into the multi-head classifier, where rotating cage wheels precisely separate particles by size. The multi-head configuration—typically 2 to 4 classifiers arranged in parallel—ensures narrow particle distribution and high throughput simultaneously. Qualified powder exits through the classifier and is collected in a cyclone or bag filter, while oversized particles cascade back onto the grinding table for reprocessing.
The grinding process is precisely controlled by the integrated classification system, which separates qualified fine powder from coarse particles. Coarse particles fall back to the grinding chamber for regrinding, while fine powder is conveyed by airflow to the cyclone collector and then to the finished product silo. This closed-circuit design ensures consistent product quality and high grinding efficiency.
Key Features & Advantages
Multi-Head Classifier System
Independent rotating cage classifiers allow precise control of cut size and produce exceptionally narrow particle size distributions with high 2-micron content—critical for high-end applications.
Hydraulic Roller Loading
Hydraulic cylinders apply consistent, adjustable grinding pressure, accommodating variations in feed material hardness while maintaining stable output quality.
Low Specific Energy Consumption
The vertical roller design grinds material using primarily compression and shear, consuming 30-50% less energy per ton than ball mills at equivalent fineness.
Internal Circulation Optimization
The integrated classification circuit eliminates the need for external elevators and separators, reducing equipment footprint, installation costs, and maintenance points.
Automatic Vibration Control
Real-time monitoring of roller vibration with automatic pressure adjustment prevents damage from tramp metal or oversized feed, protecting critical components.
Sealed Grinding Chamber
The fully enclosed grinding zone with negative-pressure air flow prevents dust leakage and allows processing of materials requiring contamination-free environments.
Applications & Industry Use
This equipment is widely used across multiple industries for various powder processing applications:
- High-end architectural and industrial paints
- Premium paper coating and filler
- Cosmetic-grade mineral powders
- Advanced ceramic raw materials
- Pharmaceutical excipients
- Specialty chemical powders
- Food-grade mineral supplements
Processable Materials
The versatile design of this equipment allows it to process a wide range of non-metallic minerals and industrial materials. Below are some of the most commonly processed materials. For detailed grinding solutions for each material, please visit our materials page.
Technical Specifications
The following table provides detailed technical parameters for each model in this product series. These specifications are based on standard configurations and may vary depending on material properties and specific application requirements. Contact our engineering team for customized configurations.
| Model | LUM1420 | LUM1632 | LUM2235 | LUM2835 |
|---|---|---|---|---|
| Grinding Table Dia (mm) | 1400 | 1600 | 2200 | 2800 |
| Roller Quantity | 2 | 3 | 4 | 4 |
| Output Fineness (mesh) | 400-3000 | 400-3000 | 400-3000 | 400-3000 |
| Capacity (t/h) | 0.2-8 | 0.5-12 | 1.5-25 | 3-45 |
| Main Motor Power (kW) | 55-90 | 90-132 | 160-220 | 250-400 |
Performance & Efficiency
The LUM Series Vertical Roller Mill is designed for maximum grinding efficiency and energy savings. The optimized grinding chamber geometry, combined with high-precision classification, ensures that energy is used effectively for particle size reduction rather than wasted on over-grinding or heat generation. Compared to conventional milling systems, our equipment typically achieves 20-30% lower power consumption per ton of finished powder.
Key performance metrics include stable fineness control with deviation less than 5%, low noise levels below 75 dB at 1 meter distance, and dust emissions below 20 mg/m3 when equipped with our pulse bag filter system. These performance characteristics make our equipment suitable for even the most demanding industrial environments and stringent environmental regulations.
Installation & Commissioning
Proper installation is critical for optimal equipment performance and longevity. Our experienced engineers provide on-site installation and commissioning services, including equipment positioning, alignment, electrical connection, piping installation, and system integration. The typical installation timeline ranges from 15 to 45 days depending on equipment model and production line complexity.
During commissioning, we conduct comprehensive performance tests including no-load test, load test, and production trial runs. We verify all performance parameters meet design specifications, calibrate control systems, train your operators on proper operation and maintenance procedures, and deliver a complete commissioning report with all test data.
Frequently Asked Questions
The multi-head classifier system uses 2 to 4 independent rotating cage wheels arranged in parallel. This configuration simultaneously achieves high throughput and narrow particle distribution. Each head can be set to slightly different cut points, producing a blend with optimal particle distribution curve for specific applications.
The LUM vertical roller mill produces finer, more uniform powder (higher 2-micron content) and handles larger capacities, making it ideal for high-end applications. The HGM ring-roller mill offers a wider fineness range at a lower investment, suitable for general fine powder production.
Yes. The grinding rollers and table are clad with specialized wear-resistant alloys. For highly abrasive materials like quartz, we offer enhanced wear protection packages with longer-life components.