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, 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.

Comparative Analysis of Ultrafine Vertical Mill and Other Grinding Mills
Ultrafine Vertical Mill	Ultrafine Ring Roller Mill	Jet Mill	Ball Mill	Raymond Mill
D97<2500 mesh Particle size <2μm, content >70%	D97<2500 mesh Particle size <2μm, content ≤30%	D97<2500 mesh Particle size <2μm, content <50%	D97<325 mesh Particle size <2μm, content <10%	D97<325 mesh Particle size <2μm, content <10%

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.

Ultrafine 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

Structural Features

Grinding System: The grinding table profile and roller shape are specially designed to prioritize inter-layer compression and shear, achieving uniform material grinding and ultra-fine powder production.

Classification System: The turbo classifier features a combined dynamic and static design, utilizing a steplessly adjustable rotor (dynamic wheel) and fixed guide vanes (static vanes) to achieve high-precision classification, with the flexibility to expand to a two-stage classification system.

Drying System: An integrated high-efficiency drying system introduces hot air simultaneously during the grinding process, enabling simultaneous drying and grinding of materials. This multi-functional design simplifies the process flow.

Drive System: Composed of a main motor and precision reducer, it provides smooth and reliable driving power to the grinding table, ensuring stable formation of the material bed.

Hydraulic System: The hydraulic system offers superior control precision, pressure range, and response stability compared to conventional vertical mills, 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 → Grinding and Drying → Precision Classification → Dust Collector → Finished

Material Bed Grinding

Raw materials meeting feed requirements (particle size ≤30mm, moisture ≤15%) are continuously and uniformly fed into the ultrafine vertical mill via an airlock feeder. The material is then driven by the high-speed rotating grinding table toward the edge of the table. Large pieces are first dispersed and broken by the plow blades before entering the grinding zone formed by the grinding rollers and table. Under stable pressure provided by the hydraulic system, the material bed undergoes repeated compression and shear, achieving uniform grinding and ultra-fine powder production.

Simultaneous Drying

As the specific surface area of the material increases dramatically after pulverization, hot air introduced from the bottom of the mill penetrates the material bed. The material undergoes thorough and efficient heat exchange with the hot air, with moisture evaporating instantly, enabling simultaneous grinding and drying.

Precision Classification

The dried ultra-fine powder is then carried by the rising airflow to the turbo classifier at the top. The turbo classification system features a combined dynamic and static design. Fixed guide vanes (static vanes) create a stable flow field, while the rotor (dynamic wheel) generates a precisely controllable centrifugal force field through stepless speed adjustment, enabling high-precision classification of the powder.

Qualified ultra-fine powder meeting fineness requirements passes through the rotor gap and is collected, while oversized particles that do not meet the standard fall back to the grinding table under gravity for regrinding, forming an internal circulation loop. (a secondary classification system is required when processing ultrafine powder >1500 mesh)

Two-Stage Classification System

Primary Classification + Pre-Classifying Mode: A cyclone separator or guide vane ring is installed downstream of the turbo classifier for pre-classification, after which the medium-coarse powder is either returned or fed into the turbo classifier for final separation. This significantly reduces the workload of the turbo classifier, achieving optimal particle size distribution efficiently with low energy consumption.

Integrated Twin Turbo Classifier Mode: A second steplessly adjustable turbo classifier is integrated in series to perform secondary classification of the ultra-fine powder produced by the first stage, enabling simultaneous and stable output of two high-quality powder products with different specifications and highly concentrated particle size distributions.

Collection & Dust Removal

A multi-stage dust collection system is employed, with cyclone collectors for primary collection and electrostatic precipitators or baghouse dust collectors as secondary collection equipment. The finished powder is collected, and the purified gas is discharged by the induced draft fan.

Application Scenarios of CRLM Ultrafine Vertical Mill

Applicable Materials for CRLM Ultrafine Vertical Mill
Non-Metallic Minerals	Metallurgical Raw Materials	Industrial Solid Waste	Other Materials
Limestone, Calcite, Marble, Dolomite, Pyrophyllite, Barite, Kaolin, Bentonite, Wollastonite, Phosphate Ore, Talc, Gypsum, etc.	Manganese Ore, Fluorite, Quartz, etc.	Slag, Granulated Blast Furnace Slag, Steel Slag, etc.	Coal Powder, Silica Powder, Barium Sulfate, Ground Calcium Carbonate, etc.

Technical Parameters of CRLM Ultrafine Vertical Mill

CRLM1200X Ultrafine Vertical Mill Parameter Comparison Table
Fineness (mesh)	Capacity (t/h)	Particle Size Distribution D97 (μm)	Specific Surface Area (cm²/g)		System Power (kW)
400	10~12	45±1	6500	±1000	560~600 (Main Unit + Fan + Classifier + Auxiliary Equipment)
600	7.5~8.0	25±1	10000	±1000
800	6.5~7.0	20±1	12500	±1000
1000	5.0~5.5	13±1	14000	±1000
1250	3.8~4.3	10±1	16000	±1000
Raw material requirements: Calcite or marble, Mohs hardness ≤3, feed particle size ≤10mm
* The above data is for reference only. Specific parameters vary depending on raw materials.

CRLM1400X Ultrafine Vertical Mill Parameter Comparison Table
Fineness (mesh)	Capacity (t/h)	Particle Size Distribution D97 (μm)	Specific Surface Area (cm²/g)		System Power (kW)
400	15~16	45±1	6500	±1000	700~750 (Main Unit + Fan + Classifier + Auxiliary Equipment)
600	11~12	25±1	10000	±1000
800	9.0~10	20±1	12500	±1000
1000	7.5~8.0	13±1	14000	±1000
1250	6.0~6.5	10±1	16000	±1000
Raw material requirements: Calcite or marble, Mohs hardness ≤3, feed particle size ≤10mm
* The above data is for reference only. Specific parameters vary depending on raw materials.

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.

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.

What is the difference between the classification systems of and ultrafine vertical mills and ultrafine ring roller mills?

Ultrafine Ring Roller Mill: Features an independent external turbo classification system that achieves precise classification using centrifugal force, offering high accuracy and concentrated particle size distribution.

Ultrafine Vertical Mill: Features a highly integrated internal classification system with a combined dynamic and static turbo classifier, enabling large-scale, high-precision ultrafine powder processing.

How to choose between ultrafine vertical mills and ultrafine ring roller mill mills?

Ultrafine Ring Roller Mill: Compact structure, lower investment cost. The finished ultrafine powder has good particle shape and excellent flowability, suitable for mid-range plastics, rubber, cosmetics, ceramic glazes, feed additives, and similar applications.

Ultrafine Vertical Mill: High integration, strong automation, large capacity. The finished ultrafine powder features high purity and highly concentrated particle size distribution, suitable for high-end coatings, inks, plastics, rubber, electronics, electrical, and similar applications.