Dolomite Powder
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Dolomite Powder
Dolomite Powder is a naturally occurring double carbonate of Calcium (CaCO₃) and Magnesium (MgCO₃), extracted from high-purity dolomite rocks. At Bigrock Mines & Minerals, we process premium-grade Dolomite into fine powder with high brightness, consistent mesh size, and controlled MgO/CaO content.
Thanks to its chemical stability, hardness, whiteness, and multi-functionality, Dolomite is used in various industrial sectors including steel, glass, paint, ceramics, construction, agriculture, and more.
| Property | Specification Range |
|---|---|
| CaCO₃ Content | 50–56% |
| MgCO₃ Content | 40–45% |
| Silica (SiO₂) | < 1.5% |
| Whiteness | 85% – 95% |
| Mesh Size | 100 to 500 mesh |
| Packaging | 25 kg / 50 kg / Jumbo Bags |
Key Features
✔ High purity CaCO₃ and MgCO₃
✔ Free from iron & silica impurities
✔ Consistent particle size distribution
✔ Available in 100–500 mesh
✔ Available in both coated/uncoated forms
Construction & Building Materials Industry
Dolomite Powder is used as an ingredient in cement, concrete, mortars, wall putty, and tile adhesives. It enhances bulk, durability, weather resistance, and reduces shrinkage cracks. In white cement, it provides a smooth surface finish and better binding.
Iron & Steel Industry
Used as a fluxing material during the smelting of iron and steel, Dolomite helps in removing impurities such as silica, phosphorus, and sulfur by forming a slag. It also helps protect the lining of blast furnaces and converters, extending refractory life.
Glass Industry
Dolomite is added to glass batches to improve glass strength, clarity, and chemical resistance. It supplies both calcium and magnesium needed for flat glass, sheet glass, and optical glass manufacturing.
Ceramics & Refractories
In ceramics, Dolomite is used in glazes, frits, and body compositions for producing sanitary ware, tiles, and pottery. It provides magnesia and calcium, which help improve thermal shock resistance and vitrification.
Paints & Coatings
Acts as a cost-effective filler and extender in emulsions, primers, distempers, and powder coatings. It enhances opacity, weather resistance, and brightness, while improving paint texture and flow.
Agriculture & Soil Conditioning
Dolomite acts as a soil conditioner and pH balancer, especially for acidic soils. It also supplies calcium and magnesium nutrients to crops, promoting better yield and root development. It is also added to animal feed as a mineral supplement.
Chemical & Industrial Processing Industry
Used in the manufacturing of magnesium salts, magnesium oxide, glass-grade chemicals, and in desulfurization of flue gases. It also serves as a neutralizer in acid-based waste treatment systems.