CRLM Ultrafine Vertical Mill

CRLM Ultrafine Vertical Mill Information Introduction

The CRLM Ultrafine Vertical Mill is a high-precision equipment upgraded and developed by Cronus Machinery based on traditional vertical mills for the high-end powder processing field. It solves problems such as high energy consumption of ball mills and jet mills, low output of ring roller mills, and insufficient fineness of Raymond mills, providing a solution for large-scale industrial production of ultrafine powder.

Through a high-precision turbo classifier and a higher-precision secondary classification system, this equipment achieves precise control of powder particle size (a secondary classification system is required when processing ultrafine powder >1500 mesh), stably producing 400~2500 mesh ultrafine powder with narrow particle size distribution and high purity (D97<2500 mesh, particle size <2 μm content >70%). It is widely used in high-end industries such as coatings, plastics, papermaking, inks, and new electronic materials.

Ultrafine Vertical Mill: Roller grinding structure, grinding rollers do not directly contact the grinding table, low vibration, no contamination to finished product, high whiteness of finished powder. Compared with other mills, it saves approximately 30% power consumption. Suitable for large-scale, high-output ultrafine powder processing.

Ring Roller Mill: High-speed rotating turntable drives grinding rollers, 2μm content ≤30%, difficult to achieve higher content. Suitable for small to medium-scale ultrafine powder processing.

Jet Mill: Can produce products with specific surface area <30000cm² at different particle size grades, but power consumption is several times that of other grinding mills. Suitable for high value-added, low production demand ultrafine powder processing.

Ball Mill: High noise, energy consumption approximately 60% higher than other grinding mills, high iron content in products. When producing ≥325 mesh ultrafine powder, process complexity and investment costs also increase.

Raymond Mill: Preferred equipment for medium-fine powder processing. Equipped with ultrafine classifier can meet 600 mesh ultrafine powder processing with low investment cost, but cannot meet higher fineness powder processing.

Features and Advantages of CRLM Ultrafine Vertical Mill

The Ultrafine Vertical Mill mainly consists of high-precision grinding, turbo classification (dynamic-static combination classification), drying, transmission, and hydraulic systems. With vertical roller mill structure, it features small footprint, low noise, reduced energy consumption, strong drying capacity, fine finished product fineness, pure color, and concentrated narrow particle size distribution. Flexible selection of secondary classification system can not only produce higher quality ultrafine powder but also simultaneously produce two different fineness grades of ultrafine powder.

Structural Features

Grinding System: Specially designed grinding table curve and roller shape, mainly utilizing interlayer compression and shearing to achieve uniform rolling and ultrafine grinding of materials.

Classification System: Turbo classifier adopts dynamic-static combination design, achieving high-precision classification through infinitely variable speed impeller (rotor) and fixed guide vanes (stator). Secondary classification system can be flexibly expanded.

Drying System: Integrated high-efficiency drying system, simultaneously inputting hot air during the grinding process to achieve synchronous drying and grinding of materials. Multiple functions in one machine, simplifying the process flow.

Transmission System: Composed of main motor and precision reducer, providing stable and reliable driving power for the grinding table, ensuring stable formation of the material bed and guaranteeing uniform powder particle size.

Hydraulic System: The hydraulic system is superior to ordinary vertical mills in control precision, pressure range, and response stability, working in coordination with the feeding and classification systems.

Performance Advantages

Concentrated Particle Size: Combining material bed grinding principle with high-precision turbo classification technology, effectively reducing coarse particles and over-grinding phenomena, resulting in concentrated narrow particle size distribution of powder.

Ultrafine Classification: Stably produces 400~2500 mesh ultrafine powder with precisely controllable fineness (D97<5μm, particle size <2μm, content >70%).

Precision Classification: Flexible selection of secondary classification system can not only produce ultrafine powder with more concentrated particle size distribution and higher quality but also simultaneously output two different fineness grades of powder.

High Integration: Integrates crushing, grinding, classification, and drying into one unit, with drying and grinding processes carried out simultaneously. Energy consumption is approximately 60% lower than traditional ball mill systems.

Low Noise and Environmental Protection: Grinding rollers do not directly contact the grinding table, resulting in low wear and low noise, effectively reducing iron contamination of the equipment and ensuring powder purity and whiteness.

Process Flow of CRLM Ultrafine Vertical Mill

Raw Material → Ultrafine Vertical Mill → Material Bed Grinding → Simultaneous Drying → Pneumatic Conveying → Precision Classification → Qualified Fine Powder → Dust Collector → Finished Product Packaging

Feeding and High-Precision Grinding

Raw material meeting the feed requirement (particle size ≤30mm, moisture content ≤15%) is continuously and uniformly fed into the Ultrafine Vertical Mill via an airlock feeder, falling onto the center of the high-speed rotating grinding table. Under centrifugal force, it moves toward the edge of the grinding table, where large blocks are first crushed and dispersed by shovels, then enter the grinding zone formed by grinding rollers and the grinding table. Under stable pressure provided by the hydraulic system, multiple cycles of compression and shearing are applied to the material layer (material bed), achieving uniform rolling and ultrafine grinding of the material.

Simultaneous Drying and Pneumatic Conveying

Hot air introduced from the bottom of the mill penetrates the material layer. As the specific surface area of the material increases dramatically after crushing, it undergoes full and efficient heat exchange with the hot air, with moisture being instantly evaporated, achieving simultaneous grinding and drying. The dried ultrafine powder is then carried by high-speed upward airflow to the top classification zone.

Precision Classification and Internal Circulation

The dust-laden airflow enters the turbo classifier. The turbo classification system adopts a dynamic-static combination design, where fixed guide vanes (stator) process the dust-laden airflow to form a stable flow field, while the core impeller (rotor) generates a precisely controllable centrifugal force field through infinitely variable speed control, achieving high-precision classification of the dust-laden airflow. Qualified ultrafine powder meeting the fineness requirement passes through the impeller clearance with the airflow and is collected as finished product, while unqualified coarse particles fall back to the grinding table under gravity for regrinding, forming an internal circulation, achieving large-scale precision processing of 400~2500 mesh powder. (A secondary classification system needs to be flexibly expanded when processing ultrafine powder >1500 mesh.)

Secondary Classification System

Primary Classification + Pre-classification Mode: A cyclone separator or guide vane ring is configured after the turbo classifier for pre-classification, with the medium-coarse powder being returned or sent to the turbo classifier for final classification, significantly reducing the workload of the turbo classifier and achieving optimal optimization of powder particle size distribution in an efficient and low-consumption manner.

Integrated Dual-Turbo Classification Mode: A second infinitely variable speed turbo classifier is integrated in series for secondary classification of the ultrafine powder produced by the first stage, simultaneously and stably outputting two different specifications of high-quality powder with highly concentrated particle size distribution.

Finished Product Collection and Exhaust Gas Treatment

A multi-stage dust collection system is adopted, with a cyclone collector for primary collection and an electrostatic precipitator or bag filter as secondary collection equipment. The finished product is collected, and the purified gas is discharged by the induced draft fan.

Application Scenarios of CRLM Ultrafine Vertical Mill

Technical Parameters of CRLM Ultrafine Vertical Mill

Frequently Asked Questions about Ultrafine Vertical Mills

What are the classification modes of Ultrafine Vertical Mill?

Single-stage Classification: Simple structure, suitable for large-scale production of single product. Mainly applied in ultrafine powder processing of conventional materials in fields such as building materials, metallurgy, and solid waste.

Single-stage Classification + Pre-classification: Efficient purification, capable of obtaining high-quality powder with optimal particle size distribution in an efficient and low-consumption manner. Suitable for high-end fields with stringent requirements on powder consistency.

Integrated Dual-Turbo Classifier: A second infinitely variable speed turbo classifier is integrated in series for secondary classification, simultaneously and stably outputting two different specifications of high-quality powder with highly concentrated particle size distribution.

What is the difference between single-head and multi-head classification systems of Ultrafine Grinding Mills?

Single-head Classification System: Adopts a single large classifier, compact structure, low cost. Suitable for conventional powder production with medium capacity and single fineness requirement.

Multi-head Classification System: Multiple independent classifiers work in parallel in coordination, achieving high-output, high-precision, large-scale production of high-end ultrafine powder.

How to improve the powder purity of Ultrafine Vertical Mill?

Optimize grinding pressure and system airflow, maintain stable material bed crushing, and use high-purity heat source to prevent thermal contamination. In terms of system configuration, install powder magnetic separators and membrane-coated filter bag dust collectors to remove metal impurities and prevent secondary contamination, thereby ensuring high purity of the final powder. When necessary, a secondary classification system can be equipped for optimal purification.