Shinagawa Refractories Co., Ltd.

Keigo Fujita

Hiroyasu Niitsuma

Takayuki Matsunaga

Ryota Okazaki

The cross-sectional shape of a flow passageis circular in a first portion; the shape of a flow passageis a flat shape in a second portion; in a connecting portion, the shape of a flow passageis a shape continuously connecting the flow passageof the first portionand the flow passageof the second portion; an openingis provided on the distal end side of the second portionand extends along a plane direction of the flat shape; and assuming that a maximum value of a cross-sectional area of the flow passagein the first portionis given by S, that a maximum value of a cross-sectional area of the flow passagein the second portionis given by S, and that a minimum value of a cross-sectional area of the flow passagewithin a range of 20% of a length Lof the first portionfrom a boundary portionbetween the first portionand the connecting portiontoward the upstream side is given by S, Sis greater than S, the ratio S/Sbetween Sand Sis 1.10 or more and 2.00 or less, and the ratio S/Sbetween Sand Sis 1.20 or more and 2.50 or less.

Immersion nozzle for continuous casting

A submerged entry nozzle includes a bottomed cylinder having a vertical side face with at least two outlet ports and having an inner side and an outer side. The outlet port satisfies the following expressions:&#x2265;1.1&#x2003;&#x2003;Expression (l)&#x2265;1.1&#x2003;&#x2003;Expression (2)where Vi indicates a vertical opening dimension of each of the at least two outlet ports on the inner side, Hi indicates a horizontal opening dimension of each of the at least two outlet ports on the inner side, Vo indicates a vertical opening dimension of each of the at least two outlet ports on the outer side, and Ho indicates a horizontal opening dimension of each of the at least two outlet ports on the outer side.

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Tokyo, Japan

Keigo Fujita