Abstract: With a rotary nozzle of the type in which a slide plate brick having at least one nozzle bore is rotated so as to adjust the degree of overlapping between the nozzle bore thereof and a nozzle bore of a fixed plate brick to control the rate of pouring of molten steel or the like, the bricks constituting the fixed plate brick and the slide plate brick are formed into the most rational and economical shape for the purpose of seeking a reduction in their cost and also the bricks are used for the purpose of seeking a reduction in the running cost of the rotary nozzle. To achieve these purposes, the shape of the brick 40 is formed into a substantially elliptic shape and nozzle bores 41a and 41b are provided in the respective eccentric positions.

Abstract: A rotary nozzle which is simple in construction and easy to manufacture its bricks, has no danger of leakage of molten steel and is capable of rotatably connecting a collector nozzle and a long nozzle. The rotary nozzle includes a fixed plate brick attached to a base member and having at least a sliding surface thereof formed to incline with an angle of .theta..degree., a slide plate surface having at least a sliding surface thereof formed as an inclined surface corresponding to the sliding surface of the fixed plate brick and fixedly mounted, along with a collector nozzle, in a supporting member, and a frame vertically displaceably supporting the supporting member through a plurality of spring means and bolts and adapted to be driven by driving means mounted on the base member. The lower end of the collector nozzle is formed into a spherical shape so as to ensure its smooth connection with a long nozzle and its rotation.