FIELD: metallurgy; off-furnace treatment of steel in ladle.
SUBSTANCE: proposed lance has refractory plug with through elongated slotted passages, resonator located in refractory plug for excitation of elastic acoustic vibrations of gas, Laval nozzle built in reflector made in form of cover closing the bottom of refractory plug for forming the cavity between inner surface of cover and bottom of refractory plug communicating with through elongated slotted passages.
EFFECT: improved quality of metalworking.
2 cl, 1 dwg, 1 ex
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