Raymond mill processing granite

• Publication time：2025-07-03
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What is granite?

Granite is a common and widely used rock with a rich mineral composition, mainly composed of quartz, feldspar, and mica. It has a Mohs hardness of 6 - 7, which can resist scratching and wear; its density is approximately 2.6 - 2.8 g/cm³, with a compact structure, a water absorption rate usually less than 0.5%, making it difficult to penetrate water, and it has strong durability and stability. It is widely distributed in the continental crust and is one of the main rocks that make up mountains and hills.

Application of Raymond Mill in Processing Granite

Granite has a Mohs hardness of 6 - 7. During processing, the grinding rollers and grinding rings are prone to wear, increasing maintenance costs. The Raymond Mill is inexpensive with low investment. It is suitable for the production of granite powder with small to medium output (1 - 20 tons per hour).

Powder with a fineness of 80 - 200 mesh is used in the construction field. It is a raw material for artificial stone production and can also be used as a filler for architectural coatings.

Powder with a fineness of 200 - 400 mesh is widely used in the ceramic and rubber industries. It can add color and texture to ceramic glazes and improve the performance of rubber products.

Powder with a fineness above 400 mesh is used in the high - end plastic and paint industries. It can improve the performance of plastic products and enhance the fluidity and gloss of paints.

Process of processing granite with Raymond mill

Coarse crushing: Large pieces of granite are crushed into particles ≤ 30mm under the action of a crusher.

Drying: If the moisture content of the raw material is > 1%, it needs to be dried to evaporate the moisture.

Grinding and classification: The rotating main shaft drives the grinding roller to rotate, the grinding roller rolls the grinding ring, and the classifier screens the particle size of the material.

Collection and dust removal: Qualified fine powder enters the cyclone separator with the airflow, is separated from the airflow and collected, and fine dust is captured a second time by the pulse dust collector.

Processing difficulties: The mineral composition of granite is complex. Quartz and feldspar exacerbate equipment wear, and mica deteriorates the fluidity of the powder, affecting the classification effect and resulting in uneven particle size of the finished powder.

Suggestions for the Processing Scheme of Granite with Raymond Mill

Material selection：Select high - chromium alloy or wear - resistant ceramic coating for the material of grinding rolls, which can extend the service life.

Parameter adjustment：Adjust the rotational speed of the classifier and the angle of the blades to control the fineness of the finished product. Increasing the air volume can increase the output, but it is necessary to find a balance between the output and the fineness. Reasonably adjust the opening of the fan damper to control the air volume.

Lubricate： Add high - temperature resistant grease once every 8 hours.

Maintain：Replace worn parts regularly. The service life of grinding rolls and grinding rings is generally about 800 - 1200 hours. When the wear exceeds the specified limit, they should be replaced in a timely manner.

Cleaning：Clean the filter bags of the pulse dust collector once a week and regularly check other components.

Summary

Granite is an important raw material, and Raymond mill provides technical support for its processing. Although it faces challenges such as equipment wear and powder quality control, these can be solved through reasonable design, precise adjustment, and effective maintenance.

Click on the picture to learn about the details of the CRRM Raymond Mill