Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Nittetsu Plant Designing Corporation

Masato Sugiura

Shuichi Yamazaki

Yasumitsu Kondo

Hiroshi Tanei

Satoshi Suzuki

Koichi Fukuda

Akihide Sano

Tomoaki Tanaka

Hirohisa Yamada

Michitaka Sakaida

Makoto Sumi

Kosuke Yamashita

Yoshifumi Morizane

Kiyomi Horikoshi

Keisuke Irie

Tomoyuki Nakagawa

Masahiko Yokomizo

Manabu Kuninaga

Hizuru Egawa

Shuji Naito

A scale composition determination device () determines that FeOhas been generated in the outermost layer of a scale (SC) in the case where at least one of spectral emissivities at one wavelength and the other wavelength that are measured by radiometers for spectral emissivity measurement () is not within a predetermined range including spectral emissivities of FeO at one wavelength and the other wavelength, and determines that FeOhas not been generated in the outermost layer of the scale (SC) in the case where all of the spectral emissivities at one wavelength and the other wavelength that are measured by the radiometers for spectral emissivity measurement () is within the predetermined range including the spectral emissivities of FeO at one wavelength and the other wavelength.

Scale composition determination system, scale composition determination method, and program

A scale composition determination device () determines that FeOhas been generated in the outermost layer of a scale (SC) in the case where the absolute value of a difference between temperatures of a steel material SM measured by radiation thermometers () is equal to or more than a predetermined temperature, and determines that FeOhas not been generated in the outermost layer of the scale (SC) in the case where the absolute value of the difference between the temperatures of the steel material SM measured by the radiation thermometers () is not equal to or more than the predetermined temperature.

[Object] To determine an alloyed position more precisely even in processes in which induction heating is used in a previous section of alloying, which have been becoming more common in recent years, and a steel sheet is alloyed by being gradually cooled in a heat holding zone. [Solution] An alloyed position determining method includes a step for acquiring information regarding a result of measurement of radiance from each of a plurality of radiation thermometers installed in a vicinity of a heat holding zone in a hot dip galvanizing line of a steel sheet and along a conveying direction of the steel sheet in the heat holding zone, the radiation thermometers measuring radiance of the steel sheet conveyed, a step for estimating steel sheet temperatures at installation positions of the radiation thermometers by use of information regarding a temperature decreasing pattern of the steel sheet, accompanied by a position change in the conveying direction in the heat holding zone, and information regarding the installation positions of the radiation thermometers, a step for calculating emissivity at the installation positions of the radiation thermometers by use of the estimated steel sheet temperatures at the installation positions of the radiation thermometers and the information regarding the result of measurement of radiance, and a step for determining an alloyed position based on the calculated emissivity.

Alloyed position determining method, alloyed position determining apparatus, and recording medium

An oven wall three-dimensional profile data () representing concave and convex amounts on all over oven walls (R,L) at a right side and left side of a coking chamber () is generated by using image signals obtained by a wall surface observation apparatus (). A resistance index 'k' in which a resistance received by pushed coke () resulting from a rising gradient existing on the oven wall () is indexed is asked by using the oven wall three-dimensional profile data (). It can be verified that there is a correlation between this resistance index 'k' and a pushing load. Accordingly, it is possible to quantitatively evaluate a state of the oven wall () affecting on the pushing load.

Coke oven wall surface evaluation apparatus, coke oven wall surface repair supporting apparatus, coke oven wall surface evaluation method, coke oven wall surface repair supporting method and computer program

The invention provides a cooling system for protecting an image fiber and an imaging device from thermal influences and a temperature measurement apparatus, for a molten metal, capable of being easily controlled and stably measuring the temperature. The temperature measurement apparatus for a molten metal comprises four connectable portions of a nozzle portion a purge/cooling gas introduction portion, an image fiber fitting portion with a window glass and an image fiber to a double pipe nozzle protection tube. A distance from a nozzle distal end as an introduction portion of thermal radiation light to a light reception portion at an image fiber distal end becomes short so that a greater amount of thermal radiation light can be received.

Apparatus and method for measuring temperature of molten metal

Growing community of inventors

Tokyo, Japan

Masato Sugiura