Raymond mill processing shale

• Publication time：2025-09-08
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Advantages of Raymond Mill in Processing Shale

Structural advantages

 Raymond mill, also known as suspension roller disc mill, is composed of feeder, grinding roller, grinding disc and other components. The vertical structure occupies a small area, is convenient for installation and maintenance, and has high space utilization.

Flexible fineness adjustment:

The finished product fineness can be adjusted between 80 - 400 mesh, meeting the needs of different industries. When producing cement, fine powder can be obtained by increasing the rotation speed of the analyzer; when producing shale bricks, the rotation speed can be reduced.

Low energy consumption:

The grinding roller rotates around its own axis and revolves around the main axis, strongly extruding with the grinding ring. The shovel system forms a uniform bedding layer, enabling efficient crushing of shale particles, and the energy consumption is reduced by more than 30% compared with traditional methods.

Semi - automatic production

The electrical system is centrally controlled, and operators can monitor and adjust the equipment in real - time in the control room, reducing labor costs and improving production stability and controllability.

Key Points of Processing Shale with Raymond Mill

Hardness and wear

Shale has a Mohs hardness of 2 - 4, but it contains inclusions of hard minerals such as quartz, which will accelerate the wear of grinding rollers and grinding rings, reduce their service life, and increase maintenance costs and downtime.

Moisture and blockage

Natural shale has high moisture content. When grinding, moisture is released, and the wet materials are easy to adhere to the components, causing blockage, reducing output, increasing energy consumption, and even leading to shutdown for cleaning.

Composition and plasticity

Shale is rich in clay minerals. During grinding, its plasticity and viscosity increase, and the materials are easy to agglomerate into blocks, affecting the powder conveying and classification efficiency and reducing production capacity.

Particle size requirements and adaptability

Different fields have different requirements for the fineness of shale powder. In the field of building materials, brick making or ceramsite production requires 80 - 200 mesh; cement production requires 200 - 325 mesh; shale ceramsite sand or ultra - fine powder production requires more than 400 mesh. The fineness adjustment range of Raymond mill can meet these needs.

Processing Technology of Shale with Raymond Mill

Crushing

Jaw crushers and hammer crushers are commonly used equipment, which crush large shale blocks to less than 30mm, facilitating subsequent transportation, storage and processing.

Drying

Rotary drum dryers use heat transfer and thermal convection, and气流 dryers use high - speed hot air flow to reduce the moisture content of shale to below 6%.

Conveying and storage

Elevators and belt conveyors transport materials, and raw material bins temporarily store materials to ensure continuous and stable production.

Grinding

The main machine of Raymond mill grinds shale into powder, and the design of grinding rollers and grinding rings affects the grinding efficiency.

Classification and collection

 The analyzer controls the fineness of the finished product, and the cyclone collector separates and collects qualified fine powder.

Dust removal and packaging: Pulse bag filters purify the exhaust gas, and the finished shale powder is stored and transported after packaging.

Summary

Raymond mill in processing shale has the advantages of small structural floor area, flexible fineness adjustment, low energy consumption and semi - automatic production. However, there are problems in processing key points such as hardness wear, moisture blockage and composition plasticity. Its processing technology covers links such as crushing, drying, conveying and storage, grinding, classification and collection, dust removal and packaging, and the fineness adjustment range can meet the particle size requirements of shale powder in different fields.