Dolomite is a sedimentary carbonate mineral with a chemical composition of calcium magnesium carbonate. It typically occurs in layered or massive forms within sedimentary rocks and is often found in association with limestone.
Due to its suitable hardness, chemical stability, and the presence of calcium and magnesium, dolomite is widely used in industries such as iron and steel production, glass manufacturing, magnesium extraction, and construction materials. Its colour usually ranges from white to grey, with a pearly to vitreous luster.
Dolomite is a mineral with a well-ordered crystalline structure, composed of calcium and magnesium carbonate, and formed within sedimentary layers. Thanks to its heat resistance and controlled reactivity, it is widely used in metallurgy, glass production, agriculture, and water treatment.
Its colour ranges from white and grey to beige and pink, with a vitreous or pearly lustre. The presence of calcium and magnesium gives dolomite high industrial value, making it an important material in the mineral market.
Dolomite is a major source of calcium oxide (CaO) and magnesium oxide (MgO), making it highly valuable in the metallurgy of both ferrous and non-ferrous metals. The lime derived from dolomite not only lowers the melting point of metals but also acts as a fluxing agent, efficiently capturing and removing impurities such as sulfur, phosphorus, aluminium, and silica, thereby improving slag quality and overall process efficiency.
In the smelting of certain metal ores, such as copper, lime is widely used to reduce melting temperatures and absorb harmful gases, particularly SO₂. Likewise, in aluminum production via the Bayer process, significant amounts of lime are consumed, playing a critical role in purification and reaction optimisation.
Because of these properties, dolomite and its lime-based products hold a vital position in metallurgy and related industries.
Dolomite, with its natural composition of calcium and magnesium, combines high mechanical strength with critical benefits for metallurgical processes. As a flux, it excels in lowering melting temperatures and removing impurities such as sulfur and phosphorus from slag, ensuring superior process efficiency. Thanks to its chemical resistance and thermal stability, dolomite is a reliable choice for the steel, copper, and aluminium industries.
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| P₂O₅ | MnO | LOI | K₂O | Na₂O | MgO | CaO | Fe₂O₃ | Al₂O₃ | SiO₂ |
|---|---|---|---|---|---|---|---|---|---|
| - | - | 46.67 | 0.01 | 0.01 | 21.52 | 30.38 | 0.06 | 0.01 | 0.1 |
| LOI | MgO | CaO | Fe₂O₃ | Al₂O₃ | SiO₂ |
|---|---|---|---|---|---|
| 2–7% | 36–39% | 55–60% | 1% max | 1% max | 1% max |
