Dolomitic Lime & Burnt Dolomite (Doloma)

Calcined dolomite by MgO and CaO for steel slag conditioning and refractories

Burnt dolomite under HS 2518.20 is dolomite rock, a calcium magnesium carbonate, fired until it gives up its carbon dioxide and leaves a mixed calcium and magnesium oxide. Soft-burnt dolomitic lime stays reactive and goes into the converter or electric arc furnace alongside high-calcium lime; dead-burned dolomite, fired to a dense, less reactive grain, is a refractory raw material. The steelmaker adds lime and dolomite to set slag basicity and to saturate the slag with MgO, because a slag already saturated in magnesia takes less of it from the magnesia-carbon lining, and MgO-saturated or MgO–CaO slags suit the electric arc furnace. A published patent for a steelmaking flux blends burnt lime and burnt dolomitic lime at about 10–40% MgO with the balance CaO, preferably around 30% MgO, because mixtures outside that range melt at higher temperatures. The contract numbers are therefore MgO and CaO, silica and iron, loss on ignition for the soft-burnt product, bulk density for dead-burned grain, and size.

The 2024 export declarations under HS 2518.20 total about USD 142 million across reporters, led by Belgium at USD 78.6 million and 274,000 MT (55%), then the USA (USD 12.8 million, 64,000 MT), Italy (USD 11.0 million), Canada (USD 9.7 million), China (USD 8.1 million, 55,000 MT) and Spain (USD 5.7 million); it is a regional, producer-led trade. Chinese magnesia-bearing material should be checked against China's export licence catalogue for the year before an offer is accepted. CBIL is a commodity brokerage company and brokers dolomitic lime and burnt dolomite between producers and steel plants and refractory makers against SGS, Bureau Veritas or Intertek analysis of MgO, CaO, SiO₂, Fe₂O₃, Al₂O₃, loss on ignition, bulk density and sizing, with a certificate of origin and a safety data sheet, in 1 MT jumbo bags in containers or breakbulk, kept dry, on FOB, CFR and CIF terms. HS 2518 is not on the EU CBAM Annex I list, which covers cement under 2523 and calcined clay under 2507 for this sector. Price is agreed per MT on grade and pack; magnesite and dead-burned magnesia have their own page. Send your MgO floor, silica and iron ceilings, size and use and the enquiry is screened and worked against it.

See also: Raw dolomite (HS 2518.10): flux, glass and refractory grade stone

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Excluded origins are not offered, including product re-exported, blended or re-processed through a third country. Every lot moves with a certificate of origin naming the producing plant, mine or grower country, and nothing is quoted before the seller and loading point are known.