Shinagawa Refractories Co., Ltd.

Hiroyasu Niitsuma

Keigo Fujita

Shinsuke Inoue

Takayuki Matsunaga

Hidetaka Ogino

Ryota Okazaki

Yukio Okawa

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.

Submerged entry nozzle

A submerged nozzle for continuous casting of molten metal, wherein two or more discharge hole flow passages are provided on a cylindrical side surface of a submerged nozzle, and first and second inner surface side walls and first and second outer surface side walls of the discharge hole flow passages in a horizontal cross-section of the submerged nozzle when in use are composed by straight lines formed so as to be inflected at an inner side point of inflection and an outer side point of inflection.

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Tokyo, Japan

Hiroyasu Niitsuma