IMMERSIBLE NOZZLE Russian patent published in 2003 - IPC

FIELD: steel continuous casting. SUBSTANCE: immersible nozzle has member in the form of twisted band which width is approximately equal to nozzle inner diameter. Said member separates steel flow inside nozzle into two whirling parts for trapping of floated inclusions got into melt and preventing of inclusions sticking to nozzle walls. Said member may be installed in nozzles of direct and bifurcated types. Surface of nozzle internal wall at outlet is made in the form of arc that facilitates direction of melt flow to meniscus to prevent steel temperature drop in meniscus zone. EFFECT: production of high quality castings, increased service life. 6 cl, 11 dwg, 6 tbl