Shinagawa-ku, Japan
Shinagawa-ku, Japan

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Patent
Shinagawa Refractories Co. | Date: 2013-05-15

This invention relates to a gas blowing nozzle for blowing a gas to a molten metal in a furnace, including a plurality of narrow metal pipes for gas introduction, a surge tank storing a gas before blowing, and a refractory protecting the narrow metal pipes and the surge tank, the gas blowing nozzle including: a first nozzle section including a plurality of first narrow metal pipes having open furnace-side tips exposed to an inside of the furnace and being in the state of capable of blowing a gas to the molten metal in the furnace, a first surge tank communicated with the first narrow metal pipes, and a first refractory protecting the first narrow metal pipes and the first surge tank; and a second nozzle section including a plurality of second narrow metal pipes, a second surge tank communicated with the second narrow metal pipes, and a second refractory protecting the second narrow metal pipes and the second surge tank, in which furnace-side tips of the second narrow metal pipes are embedded in the second refractory such that the furnace-side tips of the second narrow metal pipes are located in a given depth and the furnace-side tips are occluded, in which blowing of a gas from the first nozzle section is continuously conducted in the state of applying pressure of the gas to the second nozzle section, and when erosion of the second refractory reaches the furnace-side tips of the second narrow metal pipes embedded in the second refractory, occluded furnace-side tips of the second narrow metal pipes are opened, and blowing of a gas from the second narrow metal pipes is started.


Patent
Shinagawa Refractories Co. | Date: 2011-06-23

This invention relates to a gas blowing nozzle for blowing a gas to a molten metal in a furnace, the gas blowing nozzle including: a first nozzle section including a plurality of first narrow metal pipes having open furnace-side tips exposed to an inside of the furnace and being in the state of capable of blowing a gas to the molten metal in the furnace, a first surge tank communicated with the first narrow metal pipes, and a first refractory protecting the first narrow metal pipes and the first surge tank; and a second nozzle section including a plurality of second narrow metal pipes, a second surge tank communicated with the second narrow metal pipes, and a second refractory protecting the second narrow metal pipes and the second surge tank.


Patent
Shinagawa Refractories Co. | Date: 2010-02-03

An object is to provide a nonaqueous hot casting repair mix which, while enjoying simple and convenient installation, can substantially reduce hardening time after installation. The hot casting repair mix according to the invention is characterized by containing 5 to 30% by weight of a binder capable of forming a carbon bond in hot condition and 1 to less than 5% by weight of an iron powder and the balance consisting of a refractory aggregate.


Patent
Shinagawa Refractories Co. | Date: 2014-08-27

The invention provides rotating a submerged nozzle during casting to arbitrarily change the discharge angle of molten metal, causing the molten metal in the mold for slab to be rotated and stirred. A slab continuous casting apparatus according to the invention supplies molten metal from a tundish to a water-cooled mold for slab through at least an upper nozzle, a slide valve and a submerged nozzle and solidified the molten metal and provided with a submerged-nozzle quick replacement mechanism. The slab continuous casting apparatus further includes a discharge-direction changing mechanism capable of arbitrarily changing discharge angle of the molten metal as viewed in a horizontal cross section, during casting, the discharge-direction changing mechanism being provided between a slide valve device for opening and closing the slide valve and the submerged nozzle.


In order to simplify work of applying and releasing a surface pressure in a slide valve device constructed of a fixed plate, a slide plate, a seal plate, and the like, provided is a slide valve device for automatic surface pressure application and a surface pressure application method therefor, the slide valve device including: a base frame (2) including a positioning member (51) for determining an arrangement location (X) of a seal case (21) and a stopper (52) for fixing the seal case (21) at the arrangement location (X) ; and a slide case (4) including a pusher (53) for sliding the seal case (21) together with the slide case (4) when sliding the slide case (4) in a surface pressure application direction.


Patent
Shinagawa Refractories Co. | Date: 2015-03-04

It is an object of the present invention to achieve improvement in the quality of cast metal by generating a stable rotational flow of molten steel inside a mold. The present invention provides a submerged nozzle for continuous casting of molten metal, wherein two or more discharge hole flow passages (2) are provided on a cylindrical side surface of a submerged nozzle (3), and first and second inner surface side walls (6, 7) and first and second outer surface side walls (10, 11) of the discharge hole flow passages (2) in a horizontal cross-section of the submerged nozzle (3) when in use are composed by straight lines formed so as to be inflected at an inner side point (5) of inflection and an outer side point (9) of inflection, it is possible to improve the quality of cast metal by generating a stable rotational flow of molten metal inside a mold, simply by improving the shape of the discharge hole flow passages of the submerged nozzle, without making modifications to other equipment.


Patent
Shinagawa Refractories Co. | Date: 2013-03-04

A slide valve apparatus for automatic application of surface pressure is configured to include a connection switching device (20) for switching a connection position of a drive device (7) and a slide case (4) between a first connection position (discharge position) during molten metal discharge and a second connection position (surface pressure operation position) during surface pressure application/release. As a result, the drive stroke of the drive device can be greatly reduced and the already installed drive device can be used as is when a SV apparatus is upgraded.


Patent
Shinagawa Refractories Co. | Date: 2010-12-22

An object of the invention is to provide a hot gunning repair mix excellent in peeling resistance and hardenable for a short period of time. The hot gunning repair mix according to the invention is a hot gunning repair mix including a refractory raw material containing 20 to 40% by weight of grains having a size of 75 m or less and a binder for forming a carbon bond in hot condition, in which a metal powder or an iron alloy powder containing iron (Fe) as a main component and 70% by weight or more of grains having a size of 1.0 mm or less is added in an amount of 5 to 50% by weight based on a total amount of the refractory raw material and the binder.


Patent
Shinagawa Refractories Co. | Date: 2013-06-18

A length from a lower end position of the detection head (11) to a measurement lower limit of the detection head (11) is divided by height positions separated with a predetermined interval pitch. A plurality of virtual level plates (40) are prepared to be placed respectively at the height positions separated with a predetermined interval pitch such that gaps between themselves and each wide face of the mold (1) are not larger than 2 mm respectively at the height positions. Calibration is carried out while using each of the virtual level plates (40) at a corresponding one of the height positions.


Patent
Shinagawa Refractories Co. | Date: 2013-04-11

A submerged nozzle for continuous casting of molten metal, wherein two or more discharge hole flow passages are provided on a cylindrical side surface of a submerged nozzle, and first and second inner surface side walls and first and second outer surface side walls of the discharge hole flow passages in a horizontal cross-section of the submerged nozzle when in use are composed by straight lines formed so as to be inflected at an inner side point of inflection and an outer side point of inflection.

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