Description:
Carmeuse provides quality dolomitic quicklime for industrial applications that require the right balance of calcium and magnesium content. Dolomitic quicklime, chemically known as calcium magnesium oxide (CaO•MgO), or commonly referred to as dolime, is derived from limestone with 35% to 46% magnesium carbonate content. Our material is routinely tested for quality and consistency, to ensure the right chemical and physical properties for industrial applications.
Benefits:
- Calcium and magnesium content for specific application needs
- Efficient source for pH adjustment and acidity control
- Routine testing for quality and consistency
- Available in a variety of sizes from pebble down to fines
- Offers safety advantages when used to replace caustic soda
For additional information, to view our Product Typical Sheets or to discuss availability with our sales group, please contact us.
Documentation
For additional information, to view our Product Typical Sheets, or to discuss availability with our sales group please contact us.
Dolomitic Quicklime Production
Dolomitic quicklime (CaO•MgO) is produced when dolomitic limestone, also known as dolomite or calcium magnesium carbonate (CaCO3 • MgCO3), is heated in a kiln through the process of calcination
CaCO3 • MgCO3 + heat --> CaO • MgO + 2 CO2
Starting from our underground and open-pit mines, dolomitic limestone containing high magnesium levels is collected, transported, then crushed, sized, and fed through a lime kiln where it is heated at extremely high temperatures. The resulting calcium magnesium oxide (CaO•MgO), is known by many names including dolomite lime, dolomitic lime, dolime, and, of course, dolomitic quicklime.
As with other quicklime products, dolomitic quicklime will react to moisture, so it is important to protect it throughout the production and handling process. Following production, dolomitic quicklime is stored in a silo, then kept in an enclosed vessel for transport via truck, rail, or barge. At its destination, the quicklime is transferred to an onsite silo for storage until it needed for the application. To determine if your lime handling systems are operating at their peak, learn about our Carmeuse End-2-End Services.
Specifications
Typical Ranges are below.
Calcium content range (CaO): 56-59%
Magnesium content range (MgO): 37-41%
Size range: 2 ¼” down to 0”
Uses for Dolomitic Quicklime
Many industrial processes and systems require dolomitic quicklime, or dolime, for specific applications, including:
- BOF and EAF steelmaking – used in combination with high calcium lime as a fluxing agent to achieve proper slag chemistry and physical properties; proper magnesium content protects the refractory
- Ca-Mg hydroxide manufacturing – maximum calcium and magnesium content
- Fiberglass production – serves as a flux for modifying viscosity, preventing devitrification, and increasing the final product durability and chemical wear resistance
It all comes down to the level of calcium carbonate vs. magnesium carbonate in the originating limestone. “High calcium” indicates a high concentration of calcium carbonate, with magnesium carbonate ranging up to 5%; “dolomitic” indicates much higher magnesium carbonate levels, ranging from 35 to 46%.
Product specifications will vary by location. For more information, including availability and product typicals for your area, contact our team.
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