Facilities & Services
- Calcium Carbonate %
- Residue
- Insoluble impurity%
- Iron Oxide %
- Loss Of ignition
- Free iron%
Calcite (lime stone) is a Mineral of Carbonate & Most stable Polymorph of Calcium carbonate (CaCO3). It is normally white in colour and soft, the hardness being only 3 in Mohr’s scale. Calcite is a common constituent of approx 10% of sedimentary rock is limestone.The availability of calcite is abundant. Rajasthan (especially Udaipur and Sirohi) has the largest share (50%) of calcite resources in India.
Use of calcite is dictated by highest purity of CaCO3, as high as +98%, with highest brightness and minimum inclusions. Its applications are in varying sizes from coarse to as fine as 10 to 2 microns.
The consumption of calcite in the Paint industry, cement, ceramic, glass, pesticides, construction material, abrasive, agricultural soil treatment, construction aggregate, pigment, pharmaceutical, manufacture of bleaching powder, mortar, cement, and preparation of fat lime, detergents, soaps, polymers, plastics etc.
Requirements of Calcite for Ceramic Industry
| S.No. | Characteristics | Requirements |
| 1 | Residue on 75- Micron IS sieves, percent by mass, Max | 1.0 |
| 2 | Calcium Carbonate ( as CaCO3), percent by mass, Minimum | 97.0 |
| 3 | Insoluble impurity in hydrochloric acid, percent by mass, Maximum. | 3.0 |
| 4 | Iron Oxide ( As Fe2O3) percent by mass, Maximum | 0.5 |
| 5 | Loss Of ignition, percent by mass, Maximum | 44.0 |
| 6 | Free iron, percent by mass, Maximum | 0.05 |
Specification of Calcite Used in Different Industries*
| Constituent | Chemical | Ceramic | Cosmetic | Glass | Elactrode |
| Calcium Carbonate (CaCO3) | 99 | 97 | 97 | 95 | 95 |
| Iron (Fe) | 0.5 | 200 ppm | |||
| Copper (Cu) | 10 ppm (max) | ||||
| Magnis (Mn) | 100 ppm (max) | ||||
| Arsanic(As) | 2 ppm | ||||
| Lead(Pb) | 10 ppm | ||||
| Chloride (Cl) | 0.005 (max) | ||||
| Phosphorus (P) | 0.01 | ||||
| Sulphur (S) | 0.035 | ||||
| Iron &Titanium | 0.5 | ||||
| Iron Oxide (Fe2O3) | 0.15 | ||||
| Magnisium Carbonate (MgCo3) | 2.00 | ||||
| Silica (Si) | 2 | ||||
| Moisture | 0.2 (max) |
