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How To Make Calcite Powder?-Calcite Powder Manufacturing Process

16/05/2024 admin

The manufacturing process of calcite powder typically involves several stages, from extraction to processing and packaging.

calcite powder manufacturing process

1. Extraction and Mining

  • Mining: Calcite is extracted from natural mines. It is found in the form of marble or limestone, which are forms of calcium carbonate (CaCO₃).
  • Blasting and Excavation: The calcite is often extracted through blasting, which involves using explosives to break up the rock.

2. Crushing

  • Primary Crushing: The extracted calcite rocks are fed into primary crushers (e.g., jaw crushers) to break them into smaller chunks.
  • Secondary Crushing: The smaller chunks are then passed through secondary crushers (e.g., impact crushers or cone crushers) to reduce them to even finer particles.

Jaw Crusher-Primary Crusher


  • Feeding: Large chunks of calcite, as extracted from the mines, are fed into the jaw crusher.
  • Action: The jaw crusher consists of two jaws, one fixed and the other moving. The moving jaw exerts a compressive force on the calcite, breaking it into smaller pieces.
  • Output: The output from the jaw crusher is in the range of 6 to 10 inches (150 to 250 mm).

Impact Crusher-Secondary Crusher


  • Feeding: The material from the primary crusher is conveyed to the impact crusher.
  • Action: Use high-speed impact to break the material. Calcite is fed into the crusher, where it is struck by fast-moving hammers or blow bars, and then thrown against impact plates.
  • Output: The material is typically reduced to sizes between 0-200 mm.
  • Feed size: 350 mm
  • Capacity: 50-260 t/h

Cone Crusher-Secondary Crusher


  • Feeding: The material from the primary crusher is conveyed to the cone crusher.
  • Action: Use compression to crush the calcite. The material is crushed between a rotating cone and a fixed outer wall.
  • Output: The material is typically reduced to sizes between 3-100mm.
  • Feed size: <300mm
  • Capacity: 27-1400t/h

3. Grinding

  • Ultrafine/Raymond Mill: The crushed calcite is then ground into fine and ultrafine powder using grinding mills. Ultrafine mills or Raymond mills are typically used in this process.
  • Grading and Screening: The ground material is passed through sieves and classifiers to obtain uniform particle size. This step ensures the powder is of the desired fineness.

HGM Ultrafine Grinding Mill

  • Feed size: <25 mm
  • Output: 150~3000 meshes
  • Capacity: 0.5-45 t/hT/H
  • Applicable materials: non-inflammable non-explosive and brittle materials with Moh’s hardness under 6, such as calcite, chalk, limestone, dolomite, kaolin, bentonite, talc, mica, magnesite, illite, pyrophyllite, fly ash, etc.
  • Features: High safety and reliability. Easy to operate Energy efficient Environmental protection and pollution-free

Raymond Roller Grinding Mill

  • Feed size: <35 mm
  • Output: 80-600 mesh
  • Capacity: 1-28 T/H
  • Applicable materials: Quartz, feldspar, calcite, limestone, talc, marble, granite, dolomite, bauxite, iron ore, phosphate rock, ceramics, slag, barite, bentonite, coal gangue, coal, etc. materials.
  • Features: The grinding force is large, large amount of shovels, high classification accuracy, double cyclone collector, etc.

4. Coating (Optional)

  • Surface Modification: Sometimes, the calcite powder is coated with a thin layer of stearic acid or other surface modifiers to enhance its properties for specific applications, such as in plastics or paints.

Calcite Powder Surface Coating Machine

  • CLG powder surface modification machine has a unique design of the inner cavity of the modification machine, which has both modification and depolymerization functions.
  • Capacity: 40-7000 kg/h
  • Applicable materials: Heavy/light calcium carbonate, kaolin, talcum, wollastonite, mica, white carbon black, zinc oxide, alumina, silicon powder…
  • Features: Continuous operation, large capacity, both modification and dispersion functions, no pollution, simple operation

5. Drying (Optional)

  • Dryers: The purified calcite powder is then dried using rotary dryers or other types of dryers to reduce moisture content.

6. Packaging

  • Packaging Machines: The dried calcite powder is then packed into bags or bulk containers using automated packaging machines.

Quality Control

  • Testing: Throughout the process, samples are taken for quality testing to ensure that the final product meets industry standards and customer specifications.


Calcite powder has various applications, including:

calcite powder uses
  • Construction Industry: As a filler material in concrete and asphalt.
  • Plastic Industry: As a filler to improve the physical properties of plastics.
  • Paints and Coatings: As an extender and to provide a smooth finish.
  • Paper Industry: As a filler to improve the brightness and opacity of paper.
  • Agriculture: As a soil conditioner and animal feed additive.

Environmental Considerations

  • Dust Control: Measures are taken to control dust during the manufacturing process to protect workers and the environment.
  • Waste Management: Proper management of mining and processing waste is crucial to minimize environmental impact.

By following these steps, manufacturers can produce high-quality calcite powder suitable for various industrial applications.

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