Krosakiharima Corporation

Takashi Kayashima

Hiroyuki Tofuku

Kiyonori Hara

Junichi Funato

Hitoshi Nakamura

A tundish nozzle is used in a device for exchanging tundish nozzles juxtaposed at a bottom of a tundish. The device includes a pair of first arms pressing and supporting a first lower nozzle located at an undersurface of a first upper nozzle, the first upper nozzle being placed at the bottom of the tundish. The device includes a pair of second arms pressing and supporting a second lower nozzle located at an undersurface of a second upper nozzle, the second upper nozzle being placed at the bottom of the tundish and next to the first upper nozzle. The pair of first arms and the pair of second arms are adjoined to each other, the pairs at least partly overlapping. The tundish nozzle includes a zirconia based nozzle inserted into an alumina based refractory, and is one of the first and second lower and upper nozzles.

Tundish nozzle exchanging device, and tundish nozzle for use in the device

A device for exchanging tundish nozzles juxtaposed at a bottom of a tundish includes a pair of first arms and a pair of second arms. The pair of first arms presses and supports a first lower nozzle. The first lower nozzle is located at an undersurface of a first upper nozzle. The first upper nozzle us placed at the bottom of the tundish. The pair of second arms presses and supports a second lower nozzle. The second lower nozzle is located at an undersurface of a second upper nozzle. The second upper nozzle is places at the bottom of the tundish and next to the first upper nozzle. The pair of first arms and the pair of second arms are adjoined to each other, and the pairs at least partly overlap each other.

It is intended to develop a technique of pressing and fixing a plate by a uniform force to suppress the occurrence of a crack around a nozzle hole of the plate during use, and provide a sliding nozzle device capable of improving durability of the plate, and a plate for use in the sliding nozzle device. The sliding nozzle device comprises a plate () and a plate-receiving metal frame () for fixedly holding the plate (). The plate-receiving metal frame () is equipped with: at least two holding members () each having two pressing surfaces () consisting of a longitudinally-pressing surface and a laterally-pressing surface which are protrudingly provided thereon in spaced-apart relation to each other and each adapted to be brought into contact with a corresponding one of a plurality of side surfaces of the plate (), wherein the holding members () are symmetrically arranged with respect to a longitudinal axis of the plate-receiving metal frame (); a movable block () rotatably supporting the holding members (); and pressing means adapted to press the movable block () toward the plate. An angle between the longitudinally-pressing surface () and the longitudinal axis of the plate-receiving metal frame () is set in the range of 60 to 90 degrees, and an angle between the laterally-pressing surface () and the longitudinal axis of the plate-receiving metal frame () is set in the range of 1 to 30 degrees.

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Kitakyushu, Japan

Takashi Kayashima