Description

Dolomite (CaMg(CO3)2), Dead-Burned Refractory is a high-purity, thermally processed mineral compound, specifically calcined at high temperatures to achieve maximum density and chemical stability. This dead-burning process is critical for developing superior refractory properties, including high melting point, excellent volume stability, and strong resistance to basic slag erosion. It is an essential raw material for manufacturers in the steel, cement, glass, and non-ferrous metal industries who require durable, high-performance linings for furnaces, kilns, and ladles. CAS No. 69227-00-5.

Application

• Refractory Bricks and Shapes: Primary raw material for manufacturing basic refractory bricks (e.g., magnesia-dolomite bricks) used in steelmaking furnaces (AOD, VOD, LF), cement kilns, and glass tank regenerators.
• Steel Industry Slag Conditioner: Used as a fluxing agent in secondary steelmaking to control slag chemistry, improve desulfurization, and extend refractory lining life.
• Gunning and Patching Mixes: Key component in monolithic refractories for maintenance, repair, and lining of existing furnace structures.
• Production of Magnesium Metal: Serves as a feedstock in the Pidgeon process (silico-thermal reduction) for magnesium production.
• Soil Conditioner and Agricultural Lime: Provides a source of magnesium and calcium to correct soil acidity and improve crop nutrient availability.
• Construction Aggregate and Fillers: Used as a high-density aggregate in concrete and as a functional filler in asphalt, plastics, and paints.

Basic Information

Product Name	Dolomite (CaMg(CO3)2), Dead-Burned Refractory
CAS No.	69227-00-5
Molecular Formula	CaMg(CO3)2
Molecular Weight	184.40 g/mol
Synonyms	Calcium Magnesium Carbonate; Calcined Dolomite; Dolomitic Lime; Deadburned Dolomite; Doloma; Magnesian Limestone; Dolomite Refractory Grain; Dolomite Clinker
EINECS	Contact for details

Quality Control

Our dead-burned dolomite is produced under strict process controls to ensure consistent chemical composition, grain size distribution, and refractory performance. Quality is verified through rigorous in-process and batch testing, including X-ray fluorescence (XRF) for chemical analysis and pycnometer tests for bulk density. Certificates of Analysis (COA) detailing CaO, MgO, SiO2, Fe2O3, Al2O3, and Loss on Ignition (LOI) are available for every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated warehouse. Keep away from moisture and incompatible materials such as strong acids. Bulk storage in silos should be designed to prevent compaction and ensure free flow. Standard ambient temperature (15-25°C) conditions are suitable.

Specification

Item	Specification
Appearance	White to grayish-white granules/powder
Assay (as CaMg(CO3)2)	Min. 95.0%
Calcium Oxide (CaO)	28 - 32%
Magnesium Oxide (MgO)	18 - 22%
Silicon Dioxide (SiO2)	Max. 2.0%
Iron Oxide (Fe2O3)	Max. 1.5%
Aluminum Oxide (Al2O3)	Max. 1.0%
Loss on Ignition (LOI)	Max. 3.0%
Bulk Density	Min. 2.8 g/cm³
Grain Size	Customizable (e.g., 0-1mm, 1-3mm, 3-5mm, 5-10mm)

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.