Multi-Head Classifier
The Multi-Head Classifier is the advanced classification system at the heart of the LUM ultrafine vertical roller mill. Featuring 2 to 4 independent rotating cage wheels arranged in parallel, this system simultaneously achieves high throughput and exceptionally narrow particle size distribution. Each head can be set to the same or slightly different cut points, allowing optimized particle distribution curves for specific applications. The multi-head configuration processes more air-powder mixture than a single-head design of the same diameter, making it essential for high-capacity ultrafine powder production where both throughput and product quality are critical.
Working Principle
Multiple cage rotor heads are arranged in parallel above the grinding table. Ground powder carried by air flow enters the classification zone and is divided among the heads. Each rotating cage wheel independently classifies its portion of the air-powder stream. Oversized particles are rejected and fall back to the grinding table, while qualified powder passes through all heads and exits to the collection system. The heads can operate at the same speed (single cut point) or different speeds (optimized distribution curve).
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
Parallel Classification
Multiple heads process more air-powder mixture than a single head of the same diameter, enabling high-throughput ultrafine classification.
Narrow Distribution
Multi-stage classification produces exceptionally narrow particle size distributions with high 2-micron content.
Flexible Configuration
2, 3, or 4 heads can be configured. Heads can run at same or different speeds for optimized distribution curves.
Independent Maintenance
Individual heads can be isolated for inspection or maintenance without stopping the entire system.
Applications & Industry Use
This equipment is widely used across multiple industries for various powder processing applications:
- LUM vertical mill classification
- High-capacity ultrafine powder production
- Premium powder with high 2-micron content
- Multi-grade simultaneous production
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.
| Configuration | 2-Head | 3-Head | 4-Head |
|---|---|---|---|
| Classification Range (mesh) | 400-3000 | 400-3000 | 400-3000 |
| Air Volume (m3/h) | 3000-15000 | 6000-30000 | 12000-60000 |
| Power per Head (kW) | 3-7.5 | 3-7.5 | 3-7.5 |
Performance & Efficiency
The Multi-Head Classifier 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
Multiple smaller heads provide higher total classification area in a compact space, and each head can be set to different speeds. This allows optimized distribution curves that a single head cannot achieve. The parallel configuration also provides redundancy—production continues if one head is isolated.
The multi-head classifier is designed specifically for the LUM vertical mill and similar designs. Retrofitting to other mill types may require significant modification. Contact us for a feasibility assessment.