Nkk Corporation

Nec Corporation

Ichiro Kikuchi

Shigeru Inoue

Kenji Takahashi

Katsuhiro Iwasaki

Haruyoshi Tanabe

Masahiro Kawakami

Kenzo Yamada

Yoshiro Yamada

Genji Kanatani

Akihiko Inoue

Masaki Komatani

Hideo Nakamura

Takeshi Murai

Hideaki Mizukami

Keiichi Miyoshi

Kazusi Miyamoto

Hirofumi Nakamura

Masao Doi

Yoshimi Komatsu

Yuji Adachi

Masashi Edahiro

Shirou Takene

Takafumi Yoshikawa

Masao Hiroko

Mitsuo Yamasaki

A process rule storage unit stores a row of processes before and after each process in a process flow storage unit, a row of processes which must not exist before and after the process and a row of processes which are allowed to exist before and after process but require an operator's judgment. The process rule detection unit retrieves the process rule storage unit, and compares each process code in a row of processes with the process codes in the process flow storage unit to detect whether both condition codes agree with each other.

Production control information processing device

An apparatus and method for measuring a temperature of a high temperature liquid contained in a furnace. An optical fiber covered with a metallic tube is inserted through a passageway inside a nozzle arranged on a furnace wall of the furnace. The nozzle communicates with an interior of the furnace containing the liquid, and gas is supplied into the passageway inside the nozzle to prevent the nozzle from clogging. The metal-covered optical fiber is fed through the passageway inside the nozzle into the liquid such that spectral light radiated from the liquid enters a tip of the metal-covered optical fiber and is propagated therealong. The temperature of the liquid is determined by a radiation thermometer, coupled to the metal-covered optical fiber, based on the spectral light propagated along the metal-covered optical fiber.

Apparatus and method for measuring a temperature of a high temperature

An apparatus for smelting reduction comprising a preheat and prereduction furnace for preheating and prereducing iron ores; a smelting reduction furnace into which iron ores, carbonaceous material and fluxing material are charged and in which the iron ores are smelted and reduced; a top-blow oxygen lance through which oxygen gas is blown into the smelting reduction furnace, having decarbonizing nozzles and post combustion nozzles; and the smelting reduction furnace having bottom and side tuyeres built respectively in a side wall and a bottom thereof.

Apparatus for smelting and reducing iron ores

A method for smelting and reducing iron ores comprises the steps of: the step of preheating and prereducing iron ores; the step of charging the preheated and prereduced iron ores into a smelting reduction furnace; the step of charging carbonaceous material and fluxing material into the smelting reduction furnace; the step of blowing in oxygen gas into the smelting reduction furnace through a top-blow oxygen lance having decarbonizing nozzles and post combustion nozzles; and the step of blowing in stirring gas through side and bottom tuyeres set respectively in a side wall and a bottom of the smelting reduction furnace. Furthermore, an apparatus for smelting reduction fitted for the method comprising: a preheat and prereduction furnace preheating and prereducing iron ores; a smelting reduction furnace into which iron ores, carbonaceous material and fluxing material are charged and in which the iron ores are smelted and reduced; a top-blow oxygen lance through which oxygen gas is blown in into the smelting reduction furnace, having decarbonizing nozzles and post combustion nozzles; and the smelting reduction furnace having bottom and side tuyeres built respectively in a side wall and a bottom thereof.

Method for smelting and reducing iron ores

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Tokyo, Japan

Ichiro Kikuchi