Calcium carbonate, or CaCO3, is one of the most useful and versatile materials known to man. It is extremely common and found throughout the world in sedimentary, metamorphic and igneous rocks. Some geologists consider it to be a "ubiquitous mineral" - one that is found everywhere.
It comprises more than 4% of the earths crust and is found throughout the world. Its most common natural forms are chalk, limestone, and marble, produced by the sedimentation of the shells of small fossilized snails, shellfish, and coral over millions of years
. Although all three forms are identical in chemical terms, they differ in many other respects, including purity, whiteness, thickness and homogeneity.The properties of calcite make it one of the most widely used minerals. It is used as a construction material, abrasive, agricultural soil treatment, construction aggregate, pigment, pharmaceutical, acid neutralization, Sorbents, monuments & statuary and more. It has more uses than almost any other mineral. Calcite has a hardness of 3.0 on the Mohs scale and that makes it suitable as a low-hardness abrasive.
Calcium Carbonate as Chalk has been used as a writing tool for over 10,000 years and is a fine, microcrystalline material. As limestone, calcium carbonate is a biogenic rock, and is more compacted than chalk. As marble, calcium carbonate is a coarse-crystalline, metamorphic rock, which is formed when chalk or limestone is re-crystallized under conditions of high temperature and pressure.
Physical Properties :
| Appearance | White fine powder |
| Sp. gravity | 2.6 - 2.8 |
| Oil absorption | 12 to 15 |
| PH of 10% slurry | 9 to 10 |
| Water Soluble matter | max 1% |
| Volatile matter | max 0.5% |
| Purity as CaCO3 | 95% |
Typical Chemical Analysis
| CaCO3 | Min. 98.5% |
| MgCO3 | max 1.0% |
| Fe2O3 | max 1.0% |
Industrial Applications
Calcium carbonate, as it is used for industrial purposes, is ground calcium carbonate, or GCC. GCC, as the name implies, involves crushing and processing limestone to create a powdery-like form graded by size and other properties for many different industrial and day-to-day life applications. i.e.,- Paper, Plastics, Paints, and Coatings:
Calcium carbonate is the most widely used mineral, both as a filler and due to its special white color - as a coating pigment. In the paper industry it is valued worldwide for its high brightness and light scattering characteristics, and is used as an inexpensive filler to make bright opaque paper. As an extender, calcium carbonate can represent as much as 30% by weight in paints. Calcium carbonate also is used widely as a filler in adhesives, and sealants. - Pharmaceuticals and Food industry:
Calcium carbonate is used widely as an effective dietary calcium supplement, antacid, phosphate binder, or base material for medicinal tablets. In products such as baking powder, toothpaste, dry-mix dessert mixes, dough, and wine. Calcium carbonate is the active ingredient in agricultural lime, and is used in animal feed. - Building Materials and Construction:
Calcium carbonate is critical to the construction industry, both as a building material in its own right (e.g. marble), and as an ingredient of cement. It contributes to the making of mortar used in bonding bricks, concrete blocks, stones, roofing shingles, rubber compounds, and tiles. Calcium carbonate decomposes to form carbon dioxide and lime, an important material in making steel, glass, and paper. - Misc. Applications
Used in pollution control, neutralizing chemicals for acid wash, source of calcium salt. Applications of this is also in bulk like cement, steel and other industries. Pulverized limestone and marble are often used as a dietary supplement in animal feed. Chickens that produce eggs and cattle that produce milk need to consume a calcium-rich diet. Small amounts of calcium carbonate are often added to their feeds to enhance their calcium intake. - We ensure the highest grade & uniform particle size product for the industries like Plastics & paints.
Our Suggested Grades :
| Grade | Brightness | Particle Size | Top Cut | Oil Absorption | Application |
| SC - 10 | 96% | 2 - 5 micron | 20 | 26 | Paints, Plastics, Coatings |
| SC - 20 | 94% | 10 micron | 40 | 24 | Paints, Paper, Plastics |
| SC - 30 | 92% | 15 micron | 50 | 22 | Paper, Rubber, Adhesive |
| SC - 40 | 90% | 20 micron | 50 | 22 | Cement and Building material |