Raymond mill grinds and processes limestone into powder

• Publication time：2025-06-17
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Raymond mill and limestone

Limestone is a sedimentary rock mainly composed of calcium carbonate (CaCO₃), with calcite as the main mineral component. It often contains small amounts of dolomite, clay, quartz, or other impurities. When pure, it is white, and impurities give it different colors. The Mohs hardness of limestone is relatively low, about 3. Limestone is mostly formed in environments rich in calcium, such as shallow seas, coral reefs, or lakes.

Raymond mill is mainly used for powder processing of non-metallic minerals with a Mohs hardness less than 7 (such as limestone, calcite, barite, talc, marble, etc.). It is widely used in fields such as building materials, chemicals, metallurgy, and mining. It is the preferred equipment for limestone grinding and processing. The limestone products processed by Raymond mill have a wide range of applications, and limestone powders with different finenesses have different uses.

80 - 200 mesh: Can be used in block production, paint filling, and power plant desulfurization.

200 - 325 mesh: Can be used in plastics, rubber, and feed additives.

325 - 400 mesh: Can be used in papermaking and high - end coatings.

The process of Raymond mill grinding limestone into powder

The processing flow of limestone by Raymond mill includes four stages: pretreatment, powder grinding, classification, and finished product collection.

Preprocessing Stage: The crushing equipment reduces large limestones to a size of ≤30mm. If the raw material moisture content exceeds 5%, a dryer is required for drying.

Grinding Stage: During grinding, the crushed limestone particles are fed into the mill. Under the action of centrifugal force, the grinding rollers press against the grinding ring, crushing the limestone into powder.

Classification Stage: During classification, the fan lifts the powder, and the analyzer separates the particles by size. Coarse powder falls back for regrinding, while fine powder enters the cyclone collector. The fineness of the finished product and the output are controlled by adjusting the analyzer's rotation speed and the fan's airflow.

Finished Product Collection Stage: The cyclone separator and the pulse dust collector work together to ensure efficient collection of the finished powder and compliance with emission standards.

The advantages of Raymond mill in grinding limestone into powder

High efficiency and energy saving: The energy consumption is 30% - 40% lower than that of traditional ball mills, and the processing capacity can reach 1 - 80t/h.

Flexible fineness: It can produce limestone powder with a fineness of 40 - 400 mesh.

Good environmental friendliness: It adopts a closed system and is equipped with a pulse dust removal device, with dust emissions < 30mg/m³.

Simple maintenance: It is equipped with high chromium alloy grinding rolls and grinding rings, which are wear-resistant and easy to replace.

With other grinding mills, Raymond mill has obvious advantages in processing limestone powder with a fineness of 80 - 400 mesh. Ball mills have high energy consumption and a large equipment footprint; vertical grinding mills have high equipment costs and are more suitable for large-scale professional industrial fields; superfine grinding mills have medium to high energy consumption and are suitable for special fields with extremely high fineness requirements. The applicable fineness of Raymond mill is 80 - 400 mesh, with a production capacity of 1 - 80t/h, low energy consumption, and a lower price.

Conclusion on the Raymond mill grinding limestone into powder

As an important non-metallic mineral raw material, limestone powder has a wide range of application values. The Raymond mill, with its remarkable advantages such as high efficiency, energy saving, flexible fineness, good environmental friendliness, and easy maintenance, has become the preferred equipment for limestone processing. Compared with ball mills, vertical grinding mills, and superfine grinding mills, the Raymond mill stands out in terms of energy consumption, applicable fineness range, and comprehensive cost, especially suitable for the large-scale production of limestone powder with medium fineness (80 - 400 mesh).

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