MIXTURE FOR MAKING STEEL MELTING FLUX Russian patent published in 2020 - IPC C21C5/36 C21C5/54 C21C7/76 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly, to fluxes for steel making. Charge contains caustic magnesite (MgO), iron-containing material with calcium-containing material of fraction 5–20 mm, consisting of dolomite and a product for sorting crystalline magnesite containing SiO₂ not more than 3 wt. % and MgO not less than 30 wt. %, in ratio of (50–90):(50–10), with the following ratio of components, wt. %: calcium-containing material 45–65, caustic magnesite (MgO) 25–50, iron-containing material 5–10.

EFFECT: invention enables to obtain a flux having high strength of granules, high rate of dissolution in slugs during steel production owing to low content of SiO₂ and providing formation of protective slag belt in metallurgical unit, which protects lining against premature wear due to increased content of MgO in flux.

1 cl, 2 tbl