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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
Jaw Crusher

Jaw Crusher-Primary Crusher

Process:

  • 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

Impact Crusher-Secondary Crusher

Process:

  • 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

Cone Crusher-Secondary Crusher

Process:

  • 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.
Ultrafine Mill

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
YGM series Raymond Mill
Raymond Mill

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.
Powder Surface Coating Machine
Coating Machine

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.

Applications

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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