Calcined Dolomite

Calcined Dolomite

Calcined dolomite consists of calcium oxide (CaO) and magnesium oxide (MgO), produced by heating dolomite ore (CaCO3, MgCO3) in horizontal or vertical furnaces. During this process, CaO and MgO form separately without dissolving into each other or creating any phases between them. The heating occurs at temperatures ranging from 800 to 1100 degrees Celsius, maintaining an average of 1000 degrees Celsius for 2-4 hours. Depending on the best construction materials and grade, calcined dolomite and slaked lime can be processed in the furnace at different times.

Definition of Calcination

Calcination involves heating a material in a furnace for a specific duration and at a certain temperature to eliminate certain components. When dolomite stone undergoes this high-heat treatment in specialized furnaces, it becomes calcined dolomite.

Granulation of Calcined Dolomite

• 0-15 mm
• 5-15 mm
• 20-50 mm
• 20-60 mm

Applications of Calcined Dolomite

Iron Production

In iron production, calcined dolomite is used in the blast furnace process, either in baking or as a direct feed to the furnace. Both raw and calcined dolomite play a role in this process.

Steelmaking Lubricant

Dolomite serves two purposes in steelmaking: it acts as a source of lime (CaO), reduces the need for calcined lime, and protects the steelmaking vessel’s carbon magnesite lining.

Dairy Farming

Isfahan slaked dolomite, rich in calcium and magnesium, is a crucial component in animal feed. It lubricates feed and dry fodder, and its color enhances livestock appetite.

Water and Wastewater Treatment

Slaked dolomite can precipitate ammonium and phosphate from agricultural, urban, and industrial wastewater in water and wastewater treatment. These precipitates can be repurposed as agricultural fertilizers.

Glass and Ceramics

Dolomite is a critical raw material in the production of glass and ceramics.

Biofuel Production

Calcined dolomite is a catalyst in biofuel production, particularly in biogas production through wastewater fermentation. Slaked lime is used to purify the resulting raw gas.

Calcined Dolomite in Nature

By Beyond Group building materials suppliers in Dubai most dolomites are white or gray. Rocks containing dolomite are known as dolomite or dolomitic limestone. Due to their physical properties, carbonate minerals, including calcite and dolomite, are essential in the construction materials industry.