Immersion nozzle for continuous casting

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11897027
APP PUB NO 20230347406A1
SERIAL NO

18039825

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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The cross-sectional shape of a flow passage 31 is circular in a first portion 3; the shape of a flow passage 51 is a flat shape in a second portion 5; in a connecting portion 4, the shape of a flow passage 41 is a shape continuously connecting the flow passage 31 of the first portion 3 and the flow passage 51 of the second portion 5; an opening 52 is provided on the distal end side of the second portion 5 and extends along a plane direction of the flat shape; and assuming that a maximum value of a cross-sectional area of the flow passage 31 in the first portion 3 is given by S1, that a maximum value of a cross-sectional area of the flow passage 51 in the second portion 5 is given by S2, and that a minimum value of a cross-sectional area of the flow passage 31 within a range of 20% of a length L1 of the first portion 3 from a boundary portion 42 between the first portion 3 and the connecting portion 4 toward the upstream side is given by S3, S2 is greater than S1, the ratio S1/S3 between S1 and S3 is 1.10 or more and 2.00 or less, and the ratio S2/S3 between S2 and S3 is 1.20 or more and 2.50 or less.

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Patent Owner(s)

  • SHINAGAWA REFRACTORIES CO. LTD.

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujita, Keigo Tokyo, JP 3 1
Niitsuma, Hiroyasu Tokyo, JP 3 2

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