A ring mill, also known as a ring roller mill, micro powder grinding mill, or ultrafine grinding mill. It is a grinding equipment commonly used in the industrial production of ultrafine calcium carbonate.

Principle of Ring Mill Operation

The ring mill operates on the principle of compression and grinding.

It consists of 3 or 4 grinding rings and several grinding rollers. The material is fed into the center of the rotating grinding ring.

As the ring turns, centrifugal force pulls the material to the edge of the ring. At the edge, the material is ground between the ring and the rollers.

Key Components of Ring Mill

• Grinding Ring: The grinding ring is the main component that provides the necessary compression and shearing force for grinding. It rotates and provides the surface against which the rollers press the material.

• Grinding Rollers: These are cylindrical rollers that apply the grinding pressure to the material against the grinding ring. They roll on the ring and crush the material into fine particles.
• Classifier: A classifier is used to separate fine particles from coarse ones. The fine particles are collected, while the coarse ones are sent back for further grinding.
• Feeder: The feeder uniformly feeds the material into the grinding chamber.
• Blower: The blower provides airflow to transport the ground material through the mill and to the classifier.
• Cyclone Separator: This separates the ground particles from the air stream and collects them.

Ring Mill Advantages

1. High Fineness: Ring mills are capable of producing very fine particles, making them suitable for ultrafine grinding applications.
2. Efficiency: The design of the ring mill allows for efficient grinding with lower energy consumption compared to other grinding methods.
3. Consistency: Provides uniform particle size distribution.
4. Compact Design: The vertical structure of the ring mill requires less space compared to horizontal mills.

Applications of Ring Roller Mill

Calcium Carbonate

Widely used in the production of ultrafine calcium carbonate for applications in the plastics, paper, and paint industries.

Minerals and Ores

Suitable for grinding various minerals and ores. Mainly used for grinding non-metallic ores with Mohs hardness below 6 and some metal ores. For example limestone, calcite, dolomite, gypsum, barite, marble, kaolin, talc, iron ore, mica, bentonite, chalk, illite, pyrophyllite, pumice, sepiolite, magnesite, diatomite, graphite, fluorite, rock phosphate, fly ash, etc.

Other Materials

It can also be used for grinding glass, bamboo powder, egg shells, etc.

Technical Specifications of Ring Mill

Model	HGM80	HGM80A	HGM90L	HGM100L-Ⅱ	HGM100P	HGM125L	HGM1680L
Ring Diameter(mm)	800	800	900	1000	1000	1250	1680
Ring Number (PCS)	3	3	4	4	4	4	4
Input Size (mm)	≤10	≤10	≤10	≤15	≤15	≤20	≤20
Adjustable range of finished product (mesh)	150-3000	150-3000	150-3000	150-3000	150-3000	150-3000	150-3000
Capacity (t/h)	0.5-5.5	0.5-5.5	0.8-6.5	1.2-10	1.2-11	2.5-20	5-45
Outlet Size L*W*H (mm)	8605*4139*6050	10454*3393*6626	11735*3952*7525	14507*3633*7562	14362*4200*7562	19261*4406*8591	25067*5414*9007
Main motor power (kw)	75	75	55*2	132/75*2	132/75*2	185	315

Note:

• The technical parameters above are not binding, we reserve the right to adjust according to the actual need.
• Feed Size: Typically less than 20 mm.
• Output Size: Can achieve ultrafine sizes, typically ranging from 1 micron to 45 microns.
• Capacity: Varies depending on the model and material, but can range from a few kilograms per hour to several tons per hour.
• Power Consumption: Efficient design minimizes power usage, with specific consumption rates varying based on the application.