A calcite crushing and screening plant is a facility designed to process calcium carbonate (CaCO₃) mineral, known as calcite, into industrial-grade sizes. Calcite is naturally found in limestone, marble, or chalk forms. These plants crush, grind, size, and classify raw calcite to produce materials used in construction, chemical, agricultural, plastics, paint, and paper industries.

Process Flow:

  1. Crushing Stage:

    • Jaw Crusher or Impact Crusher: Reduces large calcite blocks (50-100 cm) to 10-20 cm.

    • Secondary/Tertiary Crushers: Further crushes material into smaller sizes (2-5 cm).

    • Grinding Mills (Optional): Ball mills or Raymond mills produce fine calcite powder.

  2. Screening and Classification:

    • Vibrating Screens: Separates crushed calcite into granular sizes (0-1 mm, 1-3 mm, 3-5 mm, etc.).

    • Air Classifiers (For Powder): Produces micron-sized particles (2-100 µm).

  3. Storage and Packaging:

    • Products are stored in silos or big bags. Powdered calcite is packaged with dust emission controls.

Applications:

  • Construction: Cement production, concrete additive, drywall filler.

  • Chemical Industry: Filler material for plastics, paints, and rubber.

  • Agriculture: Soil pH regulator and fertilizer additive.

  • Paper Industry: Coating material for brightness and opacity.

  • Food and Pharma: Food-grade calcite for calcium supplements and pharmaceutical excipients.

Key Equipment:

  • Crushers, grinding mills, vibrating screens, air classifiers, conveyor belts, dust collection systems.