Jfe Steel Corporation

Kawasaki Steel Corporation

Yuichi Uchida

Seiji Hanatani

Naoki Kikuchi

Fumiaki Yoshikawa

Naotaka Sasaki

Yukio Takahashi

Shingo Sato

Yuji Miki

Takeshi Ishii

Kenji Nakase

Shizuhiko Ikeno

Osamu Nishimura

Yozo Iwaki

Masanori Nishikori

Tadahiro Wakui

Yasuo Kishimoto

Akitoshi Matsui

Goro Okuyama

Masahiko Kajioka

Tomoshige Ono

Ryo Kawabata

Kazuhito Yamamoto

Masafumi Komatsu

Manabu Tano

Yasushi Ogasawara

Tsuguo Takehara

Futoshi Ogasawara

Hidemitsu Negishi

Kunihiko Eguchi

Kotaro Tanaka

Isamu Shiota

Masaomi Senoo

Yasutaka Ta

Yuma Igarashi

Kochiro Ejima

Hironori Fukushima

Norihiko Suzuki

A method for refining hot metal in a converter using a top-blowing lance having a refining powder supply channel, a combustion oxidizing gas supply channel, and a refining oxidizing gas supply channel that are separate from each other includes supplying at least one of a lime-based flux, iron oxide, and a combustible material as a refining powder from the refining powder supply channel to a surface of the hot metal using a fuel gas or a mixture of the fuel gas and an inert gas as a carrier gas while supplying a combustion oxidizing gas from the combustion oxidizing gas supply channel to form a flame below a leading end of the top-blowing lance, and supplying a refining oxidizing gas from the refining oxidizing gas supply channel to the surface of the hot metal.

Method for refining hot metal in converter

There is proposed a method for preliminary treatment of molten iron wherein heat source for dissolving scrap is ensured sufficiently to improve iron yield while decreasing phosphorus concentration efficiently by suppressing the amount of flux solvent used in the process of desiliconization, dephosphorization and decarburization. In the method for preliminary treatment of molten iron by conducting desiliconization and dephosphorization of molten iron with a converter type container, molten iron is first charged into the converter type container to conduct desiliconization and then intermediate slag removal is conducted, and subsequently a lime-based flux solvent is added to the container while blowing oxygen to conduct dephosphorization of the molten iron, and thereafter newly untreated molten iron is charged into the container to conduct desiliconization, and subsequently the above treatments are repeatedly conducted with the same container.

Method for preliminary treatment of molten iron

A top-blowing lance includes a refining oxygen gas blowing nozzle having a plurality of ejection openings through which oxygen gas is blown into an iron bath in a reaction vessel, the ejection openings being disposed along a circular orbit at intervals, and a burner nozzle having an axis coaxial with the central axis of the circular orbit, forming a flame inside the refining oxygen gas blowing nozzle, and having ejection openings for blowing a powder heated by the flame into the iron bath, wherein an indicator A that indicates the positional relationship between the ejection openings of the refining oxygen gas blowing nozzle and the ejection openings of the burner nozzle satisfies the specified conditions.

Top-blowing lance and method for refining molten iron using the same

A method of producing molten steel supplies gaseous oxygen from a top blowing lance into a converter to perform decarburization refining of molten iron while adding a CaO-containing powdery dephosphorizing agent to simultaneously decarburize and dephosphorize the molten iron and includes supplying the dephosphorizing agent to a bath surface of the molten iron together with at least one gas jet from the top blowing lance and a dynamic pressure determined when a gas jet blown from respective lance nozzles of the top blowing lance impinges onto the bath surface of the molten iron is controlled to not more than 0.50 kgf/cm.

Converter steelmaking method

In a molten iron refining method by charging molten iron and a cold iron source into a converter type refining vessel, supplying a material containing CaO with an oxygen source dissolving the cold iron source and conducting molten iron desiliconization, removing at least a part of the produced slag as an intermediate slag removal, and supplying a slag-forming agent and an oxygen source to the molten iron for dephosphorization, a silicon-containing material or a combination of it and carbonaceous material is added in the desiliconization then carried out under conditions such that the slag basicity (mass % CaO/mass % SiO) in the desiliconization completion is more than 0.5 but less than 1.5 and a molten iron temperature in the desiliconization completion is more than 1280&#xb0; C. but less than 1350&#xb0; C. and more than 30 mass % of the slag produced in the desiliconization is removed from the vessel in the intermediate slag removal.

Method of refining molten iron

A fiber reinforced thermoplastic resin sheet which has no warpage, higher fiber orientation or randomized fiber orientation, manufactured by supplying a dispersion containing reinforcing fibers and a thermoplastic resin from an inlet onto a moving endless mesh belt and by continuously forming a web in the shape of a sheet while subjecting the dispersion to suction and filtration, is disclosed. The method and apparatus of manufacturing the same by means of controlling the speed ratio and the distribution of the suction amount of the aqueous medium are also disclosed.

Fiber reinforced thermoplastic resin sheet and method of wet

Method of making a fiber reinforced thermoplastic sheet having

The present invention provides an apparatus for wet manufacturing a fiber reinforced thermoplastic resin sheet, having a manifold capable of uniformly distributing the solid concentrations without being affected by inertia force caused by the difference in shape between solids. The invention further provides an apparatus for wet manufacturing a fiber reinforced resin sheet having a buffer inlet or reservoir headbox capable of permitting inhibition of variations of the unit weight distribution under the effect of the dynamic pressure of the raw material dispersing liquid and the resultant fluctuations.

Apparatus for wet manufacturing fiber reinforced thermoplastic resin

A glass fiber reinforced polymer which excels in mechanical properties and is suitable for use in a large-sized structural members, formed from a dispersion liquid by dispersing reinforcement glass fibers and particulate thermoplastic resin in a surfactant-containing aqueous medium in which bubbles of air are dispersed, forming a sheet-like web on a porous support plate, and applying heat and pressure to form a sheet. The reinforcement glass fibers include a silane coupling agent while the matrix resin has functional groups bonded to the silane coupling agent. The concentration of said functional groups is higher in the regions adjacent the surfaces of said reinforcement glass fibers than in regions farther removed therefrom, and said concentration progressively decreases in the direction away from said reinforcement glass fibers.

Stampable glass fiber reinforced thermoplastic resin and method of

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Chiba, Japan

Yuichi Uchida