Types of Industrial Calcium Carbonate

Calcium carbonate (CaCO₃) is one of the most widely used industrial minerals. It is valued for its chemical stability, whiteness, and cost-effectiveness. In industry, calcium carbonate is classified into different types based on production method, particle size, surface treatment, and application field.

1. By Production Method

  • Ground Calcium Carbonate (GCC)
    Produced by mechanical grinding of natural limestone, marble, or calcite.
    👉 Features: irregular particle shape, cost-effective, widely used in plastics, rubber, construction materials, and paper.

  • Precipitated Calcium Carbonate (PCC)
    Produced chemically by reacting lime (CaO) with carbon dioxide (CO₂).
    👉 Features: controlled particle size and morphology (cubic, spherical, needle-shaped), high whiteness, suitable for paper coating, paints, adhesives, pharmaceuticals, and food additives.

2. By Particle Size

  • Standard Calcium Carbonate: 200–800 mesh, mainly used in plastics, rubber, and building materials.

  • Ultrafine Calcium Carbonate: 1250–6000 mesh, fine particle size and excellent dispersion, used in paper, paints, inks, and PVC.

  • Nano Calcium Carbonate: <100 nm, with special surface and volume effects, used in high-performance polymers, sealants, inks, and medical carriers.

3. By Surface Treatment

  • Unmodified Calcium Carbonate
    Hydrophilic, with limited compatibility in organic materials.

  • Surface-Modified Calcium Carbonate
    Treated with stearic acid or coupling agents to improve hydrophobicity and dispersion, enhancing compatibility with plastics, rubber, and coatings.

4. By Application Grade

  • Paper Grade: High whiteness and narrow particle size distribution, used as filler and coating material.

  • Plastic & Rubber Grade: Focuses on reinforcement, filling, and improving processing performance.

  • Coating & Paint Grade: Fine particle size and good dispersion, improves gloss, hiding power, and durability.

  • Pharmaceutical & Food Grade: Complies with safety standards, used as calcium supplements or food additives.

  • Construction Grade: Coarser particles, applied in cement, concrete, and lime-based products.

✅ Summary
The main types of industrial calcium carbonate are Ground Calcium Carbonate (GCC), Precipitated Calcium Carbonate (PCC), and Nano Calcium Carbonate, with further classifications based on particle size, surface modification, and application industry. Choosing the right type helps manufacturers improve product performance while controlling production costs.