Nippon Steel Corporation

Koichi Kirishiki

Takeshi Kubota

Hiroshi Harada

Yutaka Matsumoto

Masafumi Miyazaki

Wataru Ohashi

Yousuke Kurosaki

Tomohiro Konno

Shinjiro Uchida

Tadashi Mori

Non-oriented electrical steel sheet superior in core loss characterized by containing, by mass %, C: 0.01% or less, Si: 0.1% to 7.0%, Al: 0.1% to 3.0%, Mn: 0.1% to 2.0%, N: 0.005% or less, Ti: 0.02% or less, REM: 0.05% or less, S: 0.005% or less, O: 0.005% or less, and a balance of iron and unavoidable impurities and having a mass % of S shown by [S], a mass % of O shown by [O], a mass % of REM shown by [REM], a mass % of Ti shown by [Ti], and a mass % of N shown by [N] satisfying [Formula 1] and [Formula 2]:[REM]&#xd7;[O]&#xd7;[S]&#x2267;1&#xd7;10&#x2003;&#x2003;[Formula 1]([REM]&#xd7;[O]&#xd7;[S])&#xf7;([Ti]&#xd7;[N])&#x2267;1&#xd7;10&#x2003;&#x2003;[Formula 2].

Non-oriented electrical steel superior in core loss

A water-cooled panel for the furnace wall and furnace roof of an electric-arc furnace is integrally fabricated of refractory bricks arrayed on the furnace inner wall in multiple regularly spaced rows to be exposed at the end surfaces and cooling water pipes installed between the rows of refractory bricks ( ). A furnace exterior side of the refractory bricks and a furnace interior side of a cooling water pipe are overlapped in a vertical direction of the water-cooled panel, and the cooling water pipe is provided in between an upper and lower side of refractory bricks.

Water-cooling panel for furnace wall and furnace cover of arc furnace

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Kitakyushu, Japan

Koichi Kirishiki