FIELD: metallurgy.
SUBSTANCE: method consists in metal blasting with flow of nitrogen jets from below via nozzles of tuyere head and with flow of nitrogen jets from above via nozzles of tuyere under shelter cone. During metal blasting flow of nitrogen jets from below at emission from metal it is sucked with flow of nitrogen jets blasted from above under the shelter cone. Further flow of these nitrogen jets is directed to surface of metal bare from slag in the ladle.
EFFECT: raised degree of nitriding of liquid steel in ladle and upgraded quality of steel castings.
3 cl, 2 dwg
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