What is calcium carbonate used for ?

Mined in limestone or marble deposits, this finely milled compound is then used in a wide variety of products including paper, plastics, pharmaceuticals, among others as well as in construction materials. Everyday manufacturers and consumers alike benefit from the versatile mineral Calcium Carbonate Powder prized for its high purity, brightness, and adaptability. In the sections that follow, we’ll dive into its chemical properties and manufacturing steps, examine top uses, and show why Sudarshan Group delivers grades that precisely match your technical and commercial requirements.

What Is Calcium Carbonate Powder and How Is It Produced?

Calcium Carbonate Powder (CaCO₃) originates from natural sources: predominantly limestone and marble quarries. Following the blasting and primary crushing, raw rock undergoes:

1. Secondary Crushing to be done to reduce the fragments to below 50 mm.
2. Finally dry milling (in air swept ball mills or roller mills) is used to reach target fineness
3. Air Classification, characterizes the sorting of particles into the very specific size ranges-coarse (10 50m) to ultra-fine (0.5 2um).

Key quality metrics include:

• Purity: ≥99.5% CaCO₃ content
• Brightness: ≥95% (optical reflectance)
• pH Neutrality: 8.0–9.5, ideal for most formulations
• Moisture: <0.5%, ensuring flowability

Controlled and strict ISO 9001 and ISO 14001 procedures dictate all the steps that ensure batch-to-batch consistency and environmentally traumatic processes.

Top Industrial Applications of Calcium Carbonate Powder

Across sectors, Calcium Carbonate Powder serves as a multi‐functional filler:

Plastics and Polymers: Increases stiffness and dimensional stability of PVC, polypropylene and polyolefin compounds, and lowers resin costs up to 25 percent.

• Paints and Coatings: Enhances opacity, brightness, and controls the viscosity and improves scrub resistance in waterborne solvent-borne systems.
• Paper & Board: Applied in the range of 15-30 wt% as a brightness and smoothness enhancer that optimises the print quality and saves on raw fiber volumes.
• Pharmaceuticals & Food: Being compliant with Food Grade standards (FCC), it is used as an antacid, calcium supplement, anticaking agent in tablet formulations and powdered mixes.
• Construction Materials: In the cementitious mortars and plasters, coarse grades enhance the workability and compressive strength of the construction materials by 15 percent to 20 percent.

Particle size and particle surface treatment must be customized to come up with each application, e.g., the moisture-sensitive systems require hydrophobic coating whereas hydrophilic treatment is required on the aqueous dispersion application, which necessitates strict technical specifications.

Why Sudarshan Group’s Calcium Carbonate Powder Stands Out

• Grade Flexibility Diversity: The range of particle distributions- 0.5 µm to 50 µm- makes it possible to find a specific particle blend whatever the matrix is.
• Specialty Coatings: Hydrophobic, Hydrophilic and Organosilane Treatments on Enhanced dispersion.
• Technical Support: Trial on your site, optimization of rheology and collaborative development projects help to shorten the time of market introduction.
• Sustainability: Quarries are environmentally controlled, waste minimized and the entire supply chain subject to tracing.

Conclusion

Whether you’re formulating high‐performance plastics, brilliant coatings, premium paper, or reliable construction materials, Calcium Carbonate Powder remains a cornerstone ingredient. Sudarshan Group’s commitment to purity, custom sizing, and advanced surface treatments ensures you get exactly the grade you need. Contact Sudarshan Group today to request your free sample of Calcium Carbonate Powder and experience the difference our expertise brings to your products.