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US 10,987,730 B2Granted
Continuous casting apparatus and continuous casting method for multilayered slab
AssigneeNippon Steel Corporation
InventorsHiroshi Harada, Masashi Sakamoto, Yui Ito, Katsuhiro Sasai
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Abstract
A continuous casting apparatus for a multilayered slab includes a ladle having a molten steel supply nozzle; a tundish having a first retention portion that receives supply of the molten steel from the ladle through the molten steel supply nozzle and has a first immersion nozzle and a second retention portion that is adjacent to the first retention portion with a flow path interposed therebetween and has a second immersion nozzle; an addition mechanism that adds a predetermined element to the molten steel in the second retention portion; and a casting mold that receives supply of the molten steel from the tundish.
Claims20
A continuous casting apparatus for a multilayered slab comprising:
- a ladle having a molten steel supply nozzle;
- a tundish having a first retention portion that receives supply of the molten steel from the ladle through the molten steel supply nozzle and has a first immersion nozzle, and a second retention portion that is adjacent to the first retention portion with a flow path interposed therebetween and has a second immersion nozzle;
- an addition mechanism that adds a predetermined element to the molten steel in the second retention portion;
- and
- a casting mold that receives supply of the molten steel from an inside of the first retention portion through the first immersion nozzle and receives supply of the molten steel from an inside of the second retention portion through the second immersion nozzle,
- wherein, in the case of being seen in a planar view, in a path from the molten steel supply nozzle to the second immersion nozzle, the molten steel supply nozzle, the first immersion nozzle, the flow path, and the second immersion nozzle are disposed in this order,
- wherein the tundish further has a weir, by which the tundish is partitioned into the first retention portion and the second retention portion, and
- wherein, an opening portion which communicates the first retention portion and the second retention portion is formed in the weir as the flow path.
5 more elements
A continuous casting apparatus for a multilayered slab, comprising:
- a ladle having a molten steel supply nozzle;
- a tundish having a first retention portion that receives supply of the molten steel from the ladle through the molten steel supply nozzle and has a first immersion nozzle, and a second retention portion that is adjacent to the first retention portion with a flow path interposed therebetween and has a second immersion nozzle;
- an addition mechanism that adds a predetermined element to the molten steel in the second retention portion;
- and
- a casting mold that receives supply of the molten steel from an inside of the first retention portion through the first immersion nozzle and receives supply of the molten steel from an inside of the second retention portion through the second immersion nozzle,
- wherein, in the case of being seen in a planar view, in a path from the molten steel supply nozzle to the second immersion nozzle, the molten steel supply nozzle, the first immersion nozzle, the flow path, and the second immersion nozzle are disposed in this order,
- wherein the flow path is formed of a communication pipe that communicates the first and second retention portions, and
- wherein a pair of solenoid coils facing each other is disposed so as to surround the communication pipe.
5 more elements
A continuous casting apparatus for a multilayered slab, comprising:
- a ladle having a molten steel supply nozzle;
- a tundish having a first retention portion that receives supply of the molten steel from the ladle through the molten steel supply nozzle and has a first immersion nozzle, and a second retention portion that is adjacent to the first retention portion with a flow path interposed therebetween and has a second immersion nozzle;
- an addition mechanism that adds a predetermined element to the molten steel in the second retention portion;
- and
- a casting mold that receives supply of the molten steel from an inside of the first retention portion through the first immersion nozzle and receives supply of the molten steel from an inside of the second retention portion through the second immersion nozzle,
- wherein, in the case of being seen in a planar view, in a path from the molten steel supply nozzle to the second immersion nozzle, the molten steel supply nozzle, the first immersion nozzle, the flow path, and the second immersion nozzle are disposed in this order,
- wherein, in the case of being seen in a cross section perpendicular to a communication direction of the flow path,
- wherein a cross-sectional area of the flow path is 10% or more and 70% or less of a cross-sectional area of the molten steel present in the first retention portion,
- wherein the flow path is formed of a communication pipe that communicates the first and second retention portions, and
- wherein a pair of solenoid coils facing each other is disposed so as to surround the communication pipe.
7 more elements
Dependencies are inferred from the claim text.