Nippon Steel Corporation

Yui Ito

Hiroshi Harada

Masashi Sakamoto

Takuya Takayama

Keita Ikeda

Katsuhiro Sasai

Kanoko Yamamoto

A continuous casting facility used for thin slab casting has a mold for casting molten steel, an immersion nozzle that supplies the molten steel into the mold, and an electromagnetic stirring device capable of providing a swirl flow at a molten steel surface in the mold, and a thickness D(mm) of a copper plate of a long side wall, a thickness T (mm) of a steel piece, a frequency f (Hz) of the electromagnetic stirring device, electric conductivity &#x3c3; (S/m) of the molten steel, and electric conductivity &#x3c3;(S/m) of the copper plate of the long side wall are adjusted to satisfy the following formulae (1)-a and (1)-b:&#x3c;&#x221a;(2/&#x3c3;&#x3c9;&#x3bc;)&#x2003;&#x2003;(1)-a&#x221a;(1/2&#x3c3;&#x3c9;&#x3bc;)&#x3c;&#x2003;&#x2003;(1)-b,

Continuous casting facility and continuous casting method used for thin slab casting for steel

The device for controlling a flow in a mold in thin-slab casting of steel has a thickness on the short side of the meniscus portion of 150 mm or less and a casting width of 2 m or less and includes a DC magnetic field generation unit and an immersion nozzle having a slit formed at the bottom so that the slit leads to the bottom of the discharge hole and opens outside, the discharge hole and the slit are present in the DC magnetic field zone, and the magnetic flux density B (T) in the DC magnetic field zone and the distance L (m) from the lower end of the immersion nozzle to the lower end of the core satisfy Formulae (1) and (2) described below:0.35&#x2264;1.0&#x2003;&#x2003;Formula (1)&#x2265;0.06 m&#x2003;&#x2003;Formula (2)

Device for controlling flow in mold and method for controlling flow in mold in thin-slab casting

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.

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Tokyo, Japan

Yui Ito