Dolomite / Limestone

Dolomite Powder Manufacturer in India

Dolomite is a common Rock-shaping mineral. It is a calcium magnesium carbonate with a compound structure of CaMg(CO3)2. It is the essential part of the sedimentary rock known as dolostone and the metamorphic rock known as dolomitic marble. Limestone that contains some dolomite is known as dolomitic limestone.

Dolomite Powder Manufacturer in India is mainly found in present-day sedimentary environments but dolostones very common in the rock record. They can be geologically broad and hundreds to thousands of feet thick. Most shakes that are wealthy in dolomite were originally deposited as calcium carbonate muds that were post-depositionally adjusted by magnesium-rich pore water to shape dolomite. Dolomite has a Mohs hardness of 3 1/2 to 4 and is sometimes found in rhombohedral crystals with curved faces. Dolomite produces a very weak reaction to cold, dilute hydrochloric acid; however, if the acid is warm or if the dolomite is powdered a much stronger acid reaction will be observed. (Powdered dolomite can easily be produced by scratching it on a streak plate.).

Dolomite is very similar to the mineral calcite. Calcite is composed of calcium carbonate (CaCO3) while dolomite is a calcium magnesium carbonate (CaMg(CO3)2). These two minerals are one of the most common pairs to present a mineral identification challenge in the field or classroom. The best way to tell these minerals apart is to consider their hardness and acid reaction. Calcite has a hardness of 3 while dolomite is slightly harder at 3 1/2 to 4. Calcite is also strongly reactive with cold hydrochloric acid, while dolomite will effervesce weakly with cold hydrochloric acid.

Dolomite has an enormous number of uses, like
  • The most common use for dolomite is in the construction industry. It is crushed and sized for use as a road base material, an aggregate in concrete and asphalt, railroad ballast, rip-rap or fill. It is also calcined in the production of cement and cut into blocks of specific size known as "dimension stone".
  • Dolomite's reaction with acid also makes it useful. It is used for acid neutralization in the chemical industry, in stream restoration projects and as a soil conditioner.
  • Dolomite is used as a source of magnesia (MgO), a feed additive for livestock, a sintering agent and flux in metal processing and as an ingredient in the production of glass, bricks and ceramics.
  • Dolomite serves as the host rock for many lead, zinc and copper deposits. These deposits form when hot, acidic hydrothermal solutions move upward from depth through a fracture system that encounters a dolomitic rock unit. These solutions react with the dolomite which causes a drop in pH that triggers the precipitation of metals from solution.
  • Dolomite also serves as an oil and gas reservoir rock. During the conversion of calcite to dolomite a volume reduction occurs. This can produce pore spaces in the rock that can be filled with oil or natural gas that migrate in as they are released from other rock units. This makes the dolomite a reservoir rock and a target of oil and gas drilling.
Physical Properties:
  • Appearance: White Crystalline Powder.
  • Sp. gravity: 2.6 - 2.8
  • Oil absorption: 12 to 14
  • Volatile content: Max. 0.5%
  • PH of 10% slurry: 8.5 to 9.0
  • Coarse Particles: Max. 0.5%
Chemical Composition:
  • CaCO3: 56.5%M
  • MgCO3: 43.0%
  • CaO: 31.5%
  • MgO: 20.5%
  • Fe2O3: 0.5%
  • SiO2: 1.5%
  • Al2O3: 0.5%

Supplier of Dolomite Powder in India

Industrial Applications:
  • Paints: Used widely in cement paints, exterior paints, primers, putties, powder coatings and industrial finishes.
  • Plastic: Used in PVC footwear, PVC pipes, cables and others.
  • Paper Used as integral filler in paper to give smoothness and gloss.
  • Adhesives Used in adhesives and carpet backing.
  • Rubber It is used in toothpaste, cosmetic and soap industry.
Our Suggested Grades:
Grade Brightness Particle Size Top Cut Oil Absorption Application
DL-05 96% 2-5 micron 20 26 Paints, Plastics
DL-10 95% 2-5 micron 40 24 Paints, Paper, Plastics
DL-30 94% 20 micron 50 22 Paper, Rubber, Adhesive
Apart from above grades we develop tailor made dolomite to meet the specific requirement of our clients. Our R&D is also working on ultra-fine dolomite powders to develop many new products with exciting possibilities.