Water model study on structure optimization of submerged nozzle of slab continuous caster

The present paper studies the effect of structure of the submerged nozzle on the flow ability of the liquid steel in the mold of the slab continuous caster.Results show that the nozzle currently in use probably causes severe fluctuation of the liquid level,apparent exposure of the liquid steel to the atmosphere and heavy entrapment of slag and under the conditions that the other geometrical parameters of the structure of the nozzle well as its submerging depth remain unchanged by properly increasing the outlet area of the submerged nozzle the fluctuation of the liquid level can be reduced and the liquid level in the mold well covered with the mold flux and without entrapment of slag the flow ability of the liquid steel greatly improved and therefore not only the drawing speed can be increased but also the quality of casting slabs improved.