Dolomite
Combining calcium and magnesium carbonate in a naturally occurring mineral matrix, Dolomite serves as a functional filler and mineral raw material across coatings, polymers, rubber, ceramics, glass, and construction.
Product Overview: High-Purity Industrial Dolomite
Dolomite is a natural double carbonate mineral consisting of calcium carbonate and magnesium carbonate in a stoichiometric matrix [CaMg(CO₃)₂]. Characterized by moderate hardness (Mohs 3.5–4.0), high optical brightness, and chemical stability, it serves as an indispensable functional extender and mineral raw material across paints, polymers, rubber, ceramics, glass, and construction chemistry.
Its balanced calcium-to-magnesium ratio provides exceptional acid buffering, scrub resistance, and formulation dimensional stability. In exterior paints and plastics, it enhances film durability and weather resistance without altering tinting strength; in glass and ceramic systems, its dual carbonate content acts as an essential fluxing and composition-stabilizing constituent.
Key Benefits
Good Hardness
Supports durability, scratch resistance, and abrasion protection across surface coatings and polymers.
Controlled Particle Size
Promotes consistent dispersion, tight particle packing, and uniform formulation smoothness.
Good Chemical Stability
Provides dependable performance, acid buffering, and resistance to environmental weathering.
Dimensional Stability
Helps improve shape retention, reduce thermal shrinkage, and prevent warping in rigid systems.
Functional Filling Efficiency
High calcium-magnesium loading capacity that supports formulation economy while maintaining properties.
Calcium & Magnesium Content
Provides dual carbonate mineral functionality aiding composition control in glass and ceramic melts.
Applications
Paints & Coatings
Plastic & Polymer Compounding
Ceramics & Glazes
Construction Chemicals & Mortars
Technical Specifications
| Parameter | Glass Grade A | Glass Grade B | Ceramic Super | Steel Refractory | Agricultural |
|---|---|---|---|---|---|
| Calcium Carbonate | 54.5% | 54.0% | 53.5% | 52.0% | 48.0% |
| Magnesium Carbonate | 43.5% | 42.8% | 42.0% | 40.5% | 35.0% |
| MgO Content | 20.8% | 20.5% | 20.1% | 19.4% | 16.7% |
| CaO Content | 30.5% | 30.2% | 29.9% | 29.1% | 26.9% |
| Silica (SiO2) | 0.4% | 0.8% | 1.2% | 2.0% | 5.5% |
| Iron Oxide (Fe2O3) | 0.03% | 0.05% | 0.08% | 0.18% | 0.45% |
| Whiteness | 96.0% | 94.0% | 92.0% | 88.0% | 76.0% |
| Mesh Size | 325 Mesh | 200 Mesh | 200 Mesh | 100 Mesh | 100 Mesh |
Why Choose Us?
High Optical Whiteness
Selectively extracted from high-purity crystalline dolomite deposits with brightness L* ≥ 96%.
Sub-Zero Silica Content
Carefully processed to minimize free silica (< 0.5%) and metallic iron contamination.
Precision Micronization
Offered in fine powders from 200 mesh to ultrafine 2 micron cuts for demanding industrial specifications.
Prompt Bulk Delivery
Direct factory supply in palletized 50 kg HDPE bags and 1 MT bulk jumbo bags across India.