Nippon Steel Corporation

Mitsubishi Heavy Industries Limited

Katsuyuki Isogami

Takashi Arai

Keiichi Yamamoto

Toru Yoshida

Kazutoshi Yokoo

Kunimasa Sasaki

Ritsuo Hashimoto

Kazuto Yamamura

Mamoru Yamada

Tadahiro Izu

Yuziro Ueda

Michitaka Kanemoto

Keiji Tsunenari

Mitsuo Tani

Jyoji Yusa

Katsuyoshi Miyake

Tsuyoshi Tanaka

Hiroshi Izaki

A twin-drum continuous casting apparatus for casting a metal sheet () by supplying molten metal () to a pouring basin formed by a pair of cooling drums () rotating in opposite directions, and side gates (), to cool the molten metal () by contact with surfaces of the cooling drums (), thereby forming a solidified shell. The cooling drum () is formed from a drum body () having shaft portions at opposite end portions, and a drum sleeve () fitted on an outer peripheral portion of the drum body (). Also, means is provided for preventing various adverse influences due to differences in thermal expansion of constituent members of the drum body () during casting. Thus, the reliability of the apparatus is increased, and the quality of casting is improved.

Dual drum type continuous casting device and method for continuous casting

An oxygen blow steelmaking furnace comprises a device for supplying materials for blowing into the furnace, a plurality of sensing devices, and a computer control device. The supplying device supplies into the furnace oxygen and fluxes from above and, as occasion demands, at least one of oxygen, carbon dioxide and inert gas from below. The sensing devices individually respond to different properties that represent the blowing condition. The computer control device sets a program for the blow based on the charging and blowing-out conditions, responds to the sensing devices, and outputs the operating instructions to the supplying device. The computer control device includes a device that determines the oxygen content is slag based on the aforementioned properties and the amount of operational correction according to the deviation between the computed and targeted oxygen contents, and a device that estimates, immediately before the completion of the blow, the temperature and carbon content of the hot metal at the end point based on the aforesaid properties and oxygen content in slag and determines the amount of operational correction according to the difference between the estimated and targeted hot-metal temperatures and carbon contents.

Oxygen-blown steelmaking furnace

Growing community of inventors

Hikari, Japan

Katsuyuki Isogami