METHOD OF PROTECTIVE SCULL FORMING ON OXYGEN CONVERTER LINING SURFACE AND MAGNESIAN BRIQUETTED FLUX (MBF) FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC C21C5/44 F27D1/16 

FIELD: metallurgy.

SUBSTANCE: invention relates to ferrous metallurgy, in particular, to methods of protective scull forming on converter lining surface. Method consists in final slag leaving in converter, preliminary blowing of final slag with oxygen and magnesia briquetted flux addition into converter with subsequent flux modified final slag blowing with neutral gas. Between lining spraying additionally performing is magnesia briquetted flux addition in supplied into converter charging on scrap metal, wherein at each stage flux is added in amount of 2.7–8.0 kg/t of steel, spraying and melting are carried out at temperature of 1,580–1,680 °C, and used magnesia briquetted flux is composition containing magnesian component, containing periclase-carbon, in form of melting and casting units waste lining scrap and dolomite.

EFFECT: enabling increased duration of vessel campaign period from 3,000 to 5,000–8,000 melts with considerable cost-cutting of used magnesian flux.

2 cl, 2 tbl, 3 ex