Dolomite in the steel industry - flux and refractory material
Dolomite is a key raw material in metallurgy - used as a flux in blast furnaces and as a refractory material for lining steel furnaces.
The role of dolomite in the blast furnace
In the process of smelting pig iron, dolomite (CaMg(CO₃)₂) is used as a basic flux. At high temperature, it decomposes into CaO and MgO, which react with acidic components of iron ore (SiO₂, Al₂O₃) and coke ash, forming liquid slag discharged from the furnace.
Requirements for metallurgical dolomite
- CaMg(CO₃)₂ content: ≥95%
- SiO₂: ≤1%
- Fe₂O₃: ≤0.5%
- Granulation: 10–50 mm for blast furnaces
Dolomite as a refractory material
Burnt dolomite (dolimit) with a melting point above 2300°C is used as a refractory lining of electric furnaces (EAF), LD converters and steel ladles. It is characterized by resistance to basic slags.
Soil stabilization
Ground dolomite is used to stabilize road and railway foundations. Reacts with cement or lime, increasing load-bearing capacity and frost resistance.
Order wholesale dolomite
Saltiwa offers dolomite for metallurgy, agriculture and construction. Contact our sales department for specifications and B2B price list.
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