Raymond mill processes dolomite

• Publication time：2025-07-01
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What is dolomite?

The main component of dolomite is calcium magnesium carbonate (CaMg(CO₃)₂). Its Mohs hardness is 3.5 - 4, and the relative density is 2.8 - 2.9g/cm³. When pure, it is white. When containing impurities, it appears gray, light pink, or brown. It has a wide range of uses.

Application of Raymond Mill in Processing Dolomite

Dolomite is relatively soft and brittle in texture, which makes it an ideal processing object for Raymond Mill. In addition, dolomite has good abrasion resistance and corrosion resistance, greatly expanding its application range.

200 - 325 mesh dolomite powder can replace light calcium powder and lithopone, improve the performance of rubber products and reduce costs. In the plastics industry, it can be used as a high - quality filler to improve the performance of plastic products and reduce costs.

325 - 400 mesh dolomite powder can adjust the pH value of acidic soil, compensate for the loss of magnesium content, promote the growth of crops, and increase yield and quality.

Process of processing dolomite with Raymond mill

Pretreatment: Large chunks of dolomite need to be coarsely crushed by a crusher. After coarse crushing, the particle size is generally controlled to be ≤30mm. For impurity removal, a vibrating screen and a magnetic separator are used. The vibrating screen separates impurities such as soil, and the magnetic separator adsorbs magnetic impurities such as iron filings.

Grinding: The main machine of the Raymond mill consists of components such as the frame and grinding rollers. The central shaft is driven to rotate through a transmission device, so that the materials between the grinding rollers and the grinding ring are crushed.

Classification: The classification system controls the fineness of the powder. A common cage - type classifier is used, and the rotation speed affects the fineness of the finished product.

Collection: In the powder collection process, a cyclone collector and a pulse dust collector are used to recover qualified powder, and the coarse powder returns to the main machine for re - grinding.

Packaging: The powder is transported to the storage bin by a conveyor for temporary storage and can be automatically packaged or filled into ton - bags.

Key points of processing dolomite with Raymond mill

Materials: Selecting high chromium alloy grinding rolls and rings can extend their service life.

Drying: Magnesium - containing materials are prone to stickiness. The temperature inside the mill should be controlled at ≤60℃. The temperature can be controlled by adjusting the ventilation volume, etc. Regarding the moisture content, if the water content is too high, drying treatment is required, and a rotary dryer is commonly used.

Maintenance: Regularly check the bearings of the grinding rolls and lubricate them with high - temperature - resistant grease. Also, regularly check the wear and operation of other components. Replace them in a timely manner if the wear is severe. Check whether the rotational speed of the classifier is abnormal and adjust it according to the situation.

Summary

Dolomite is characterized by its softness, fragility, wear resistance and corrosion resistance. After being processed by a Raymond mill, it can be made into fine powder with a fineness of 200 - 400 mesh, meeting the needs of rubber fillers, soil improvement, etc. The processing includes links such as pretreatment, grinding and classification. For equipment maintenance, it is necessary to regularly check the status of components and the classifier to ensure the quality of the finished product.

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