METHOD OF NITRATING MOLTEN STEEL IN LADLE Russian patent published in 1994 - IPC

FIELD: metallurgy. SUBSTANCE: method involves blowing melt by gaseous nitrogen through dipper tuyere and feeding nitrogen from top by streams onto surface of bubbling zone. Nitrogen is fed from top below protective cone. Consumption of nitrogen is calculated in accordance with melt blowing rate, level of dipping tuyere into metal, diameter of bubbling zone and other parameters. While conducting the process, predetermined relationship between above-mentioned parameters should be maintained. EFFECT: increased efficiency of process. 3 cl