Patents Assigned to Nittetsu Plant Designing Corporation
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Patent number: 8722372Abstract: To provide a method for producing an ethanol which facilitates the processing of a solid component as a residue generated upon processing, while improving the recovery rate of heat energy contained in leftover food. The method for recovering and producing ethanol and oil is a method for producing ethanol by saccharification, fermentation, and distillation of leftover food. In this method, a three-phase centrifuge for performing separation into three phases of an oil component, an aqueous solution component, and a solid component is used in a step of solid-liquid separation of any one of a saccharified liquid, a fermented liquid, and a distillation waste liquid.Type: GrantFiled: January 22, 2009Date of Patent: May 13, 2014Assignees: Nippon Steel Engineering Co., Ltd., Nittetsu Plant Designing CorporationInventors: Takafumi Kiuchi, Yasuhiko Kato, Yasufumi Hajima, Norio Yoshitake, Shigeru Mitarai
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Patent number: 7850792Abstract: The present invention provides a grain-oriented electrical steel sheet product having a superior corrosion resistance, annealing resistance, film tension, and the like in insulating treatment based on a phosphate not containing chromium and a treatment agent for the same, so provides grain-oriented electrical steel sheet having an insulating film not containing chromium characterized by the insulating film containing a phosphate and one or more compounds selected from inorganic compounds of Fe, Ni, Co, Cu, Sr, and Mo in an amount, as metal elements, of 0.06 to 2.10 moles per mole of phosphate, and an insulating film agent of the same.Type: GrantFiled: July 14, 2005Date of Patent: December 14, 2010Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Osamu Tanaka, Norikazu Fujii, Hiroyasu Fujii, Kazutoshi Takeda
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Patent number: 7833360Abstract: The invention provides a method of producing a grain-oriented electrical steel sheet of the complete solid solution nitrided type that is good in glass film formation and excellent in magnetic properties, which method comprises: C: 0.025 to 0.09%, hot-rolling the steel slab containing Si: 2.5 to 4.0% and acid-soluble Al into a hot-rolled steel strip; controlling the rate at which N contained in the hot-rolled steel strip is precipitated as AlN to a precipitation rate of 20% or less; conducting hot-rolled strip annealing and cold rolling conducting decarburization-annealing combined with primary recrystallization by during the former part of the process in an atmosphere whose PH2O/PH2 is 0.30 to 0.70 and then during the latter part thereof in an atmosphere whose PH2O/PH2 is 0.Type: GrantFiled: January 12, 2007Date of Patent: November 16, 2010Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Tomoji Kumano, Shyuichi Yamazaki, Osamu Tanaka
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Patent number: 7655181Abstract: A reduced iron discharging screw conveyer is provided in a rotary hearth furnace and discharges reduced iron out of the rotary hearth furnace. The rotary hearth furnace produces the reduced iron by charging and heating a pellet including metallic oxide and coal material onto a rotary hearth rotating in a horizontal plane. The reduced iron discharging screw conveyer has a rotary shaft and a screw blade which is spirally formed on an outer surface of the rotary shaft. A lead angle ? of the screw blade 5a satisfies a condition of “0.46 rad ???0.79 rad”. A ratio (h/D) between height h of the screw blade and an outer diameter D of the screw conveyer is smaller than 0.2, and a ratio (t/h) between thickness t and height h of the screw blade is larger than or equal to 0.12.Type: GrantFiled: April 3, 2007Date of Patent: February 2, 2010Assignees: Nippon Steel Engineering Co., Ltd., Nittetsu Plant Designing CorporationInventors: Shinji Shima, Toshitaka Nakayama, Masahide Nagatomi
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Patent number: 7497987Abstract: A refining method and apparatus for decarburization refining of chromium containing molten steel in a vessel having a first step of blowing oxygen while the inside of the vessel is at a pressure of between 400 Torr and atmospheric pressure, a second step of blowing oxygen while evacuation the inside of the vessel to 250 to 400 Torr and a third step of blowing gas while evacuating the vessel to not more than 250 Torr. Further, a refining method and apparatus for ultra-low carbon chrome melt by performing a first vacuum refining until the third step, then restoring the pressure in the vessel to at least 400 Torr, then performing second vacuum refining while making the bottom blowing gas blow rate at least 0.4 Nm3 per to steel.Type: GrantFiled: February 28, 2007Date of Patent: March 3, 2009Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Kosuke Yamashita, Ryuji Nakao, Tomoaki Tanaka, Masao Igarashi, Koichiro Yoshino, Makoto Sumi
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Publication number: 20090032142Abstract: The invention provides a method of producing a grain-oriented electrical steel sheet of the complete solid solution nitrided type that is good in glass film formation and excellent in magnetic properties, which method comprises: C: 0.025 to 0.09%, hot-rolling the steel slab containing Si: 2.5 to 4.0% and acid-soluble Al into a hot-rolled steel strip; controlling the rate at which N contained in the hot-rolled steel strip is precipitated as AlN to a precipitation rate of 20% or less; conducting hot-rolled strip annealing and cold rolling conducting decarburization-annealing combined with primary recrystallization by during the former part of the process in an atmosphere whose PH2O/PH2 is 0.30 to 0.70 and then during the latter part thereof in an atmosphere whose PH2O/PH2 is 0.Type: ApplicationFiled: January 12, 2007Publication date: February 5, 2009Applicants: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Tomoji Kumano, Shyuichi Yamazaki, Osamu Tanaka
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Patent number: 7471182Abstract: A means for treating the end faces of a core which is used for an electrical apparatuses and etc., to give insulation extremely superior in effect of improvement of the insulation, corrosion resistance, adhesiveness, heat resistance, and magnetic properties at a low temperature in a short time without cleaning for removing punching oil, annealing, or other pre-treatment; a core having an insulation coating comprised of a dry film of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as a silicone compound on the core end faces and having an average film thickness of at least 0.5 ?m, a breakdown voltage of at least 30V, and a heat resistance in the air of at least 400° C.; and a method of production comprised of forming a core, then dipping it in or spraying it by one or more types of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as an insulation coating.Type: GrantFiled: January 12, 2007Date of Patent: December 30, 2008Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Tomoji Kumano, Chikara Kaido, Hiroyasu Fujii, Kazutaka Higashine, Osamu Tanaka, Norikazu Fujii, Kazufumi Hanzawa, Masayoshi Tanaka, Yuji Kubo, Noriko Yamada
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Patent number: 7311519Abstract: The invention provides a raw materials feeding apparatus capable of uniformly dispersing and feeding into a furnace agglomerated raw materials that are likely to undergo dusting, deformation and mutual adhesion. In a raw material feeding apparatus for a rotary hearth furnace, for feeding raw materials to a rotary hearth furnace by using a flat belt conveyor, the invention employs a construction in which a scraper for guiding the raw materials on the flat belt conveyor to a side surface of the flat belt conveyor is arranged obliquely to a traveling direction of the flat belt conveyor. Preferably, the scraper is arranged in such a manner as to guide the raw materials to both sides of the flat belt conveyor.Type: GrantFiled: November 21, 2003Date of Patent: December 25, 2007Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Shinji Shima, Yuichi Sakurai, Masahide Nagatomi
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Publication number: 20070188289Abstract: A means for treating the end faces of a core which is used for an electrical apparatuses and etc., to give insulation extremely superior in effect of improvement of the insulation, corrosion resistance, adhesiveness, heat resistance, and magnetic properties at a low temperature in a short time without cleaning for removing punching oil, annealing, or other pre-treatment; a core having an insulation coating comprised of a dry film of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as a silicone compound on the core end faces and having an average film thickness of at least 0.5 ?m, a breakdown voltage of at least 30V, and a heat resistance in the air of at least 400° C.; and a method of production comprised of forming a core, then dipping it in or spraying it by one or more types of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as an insulation coating.Type: ApplicationFiled: January 12, 2007Publication date: August 16, 2007Applicants: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Tomoji Kumano, Chikara Kaido, Hiroyasu Fujii, Kazutaka Higashine, Osamu Tanaka, Norikazu Fujii, Kazufumi Hanzawa, Masayoshi Tanaka, Yuji Kubo, Noriko Yamada
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Publication number: 20070152386Abstract: A refining method and refining apparatus, able to shorten the time required for refining and reduce the refining costs in decarburization refining of a chromium-contained molten steel, which refining method for chromium-contained molten steel etc. performing decarburization refining by blowing a gas containing oxygen gas into a chromium-contained molten steel under a vacuum or atmospheric pressure and vacuum, said refining method for a chromium-contained molten steel etc. characterized by having a first step for blowing oxygen gas while making the inside of the vessel a pressure of a range of 400 Torr (53 kPa) to atmospheric pressure, a second step for blowing oxygen gas while evacuating the inside of the vessel to 250 to 400 Torr (33 to 53 kPa), and third step for blowing gas while evacuating the inside of the vessel to not more than 250 Torr (33 kPa).Type: ApplicationFiled: February 28, 2007Publication date: July 5, 2007Applicants: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Kosuke Yamashita, Ryuji Nakao, Tomoaki Tanaka, Masao Igarashi, Koichiro Yoshino, Makoto Sumi
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Patent number: 7173509Abstract: A means for treating the end faces of a core which is used for an electrical apparatuses and etc., to give insulation extremely superior in effect of improvement of the insulation, corrosion resistance, adhesiveness, heat resistance, and magnetic properties at a low temperature in a short time without cleaning for removing punching oil, annealing, or other pre-treatment; a core having an insulation coating comprised of a dry film of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as a silicone compound on the core end faces and having an average film thickness of at least 0.5 ?m, a breakdown voltage of at least 30V, and a heat resistance in the air of at least 400° C.; and a method of production comprised of forming a core, then dipping it in or spraying it by one or more types of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as an insulation coating.Type: GrantFiled: October 4, 2002Date of Patent: February 6, 2007Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Tomoji Kumano, Chikara Kaido, Hiroyasu Fujii, Kazutaka Higashine, Osamu Tanaka, Norikazu Fujii, Kazufumi Hanzawa, Masayoshi Tanaka, Yuji Kubo, Noriko Yamada
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Patent number: 6923573Abstract: 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.Type: GrantFiled: July 26, 2002Date of Patent: August 2, 2005Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Kosuke Yamashita, Tomoaki Tanaka, Masato Sugiura, Kiyomi Horikoshi, Makoto Sumi
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Patent number: 6698532Abstract: A piercing apparatus compact in size having a decreased number of hoses is suited for use as an iron runner port-opening machine for a blast furnace or the like furnace in an iron mill.Type: GrantFiled: March 5, 2003Date of Patent: March 2, 2004Assignees: Nippon Steel Corporation, Yamamoto Rock Machine Co., Ltd., Nittetsu Plant Designing CorporationInventors: Manabu Gotou, Keisuke Morimitsu, Hiromi Kawakami, Tuneo Iwasaki, Kazuo Haga, Yoshiichi Yatagai, Manpei Hontani, Hiroyuki Takao
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Patent number: 6685876Abstract: An automatic control method for a taphole opener for opening a taphole by giving impact and rotation to a drill unit holding a drilling rod and driving the drill unit forward and backward by a hydraulically driven feed motor, which method comprises the steps of; detecting the driving load in the form of detected hydraulic pressure, stopping the driving but maintaining the rotation when said detected pressure reaches an upper limit set value beyond which buckling may occur, and resuming the driving when said detected pressure falls to a lower limit set value or below. The drilling rod of the drills unit is prevented from buckling and idle hitting and a quicker taphole opening operation and enhanced accuracy of taphole depth can be obtained. Thus remote operation is made possible through the automation of the taphole opening work.Type: GrantFiled: October 26, 2001Date of Patent: February 3, 2004Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Tarumi Murata, Toshiya Kitagawa, Masaaki Nogami
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Patent number: 6615633Abstract: The present invention provides a method to control the flatness of a metal sheet or plate by effectively preventing waviness from occurring at the edge portions of the sheet or plate when it is cooled to the room temperature after completing hot rolling, and an apparatus to carry out the method: and relates to a method to control the flatness of a metal sheet or plate by homogenizing the surface temperature distribution of the metal sheet or plate through; measuring the surface temperatures of the metal sheet or plate at the edge portions and the center portion across its width between two rolling stands of a tandem finishing mill, or at the entry to and/or the exit from a reversing finishing mill, or after completing hot rolling, or after hot leveling; controlling the heating temperatures of the edge portions and/or the center portion based on the measured surface temperatures; and then cooling the metal sheet or plate after completing the finishing rolling.Type: GrantFiled: August 22, 2001Date of Patent: September 9, 2003Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Toru Akashi, Motokazu Koreeda, Seiji Arizumi, Yoshihiro Serizawa
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Patent number: 6601655Abstract: A piercing apparatus compact in size having a decreased number of hoses is suited for use as an iron runner port-opening machine for a blast furnace or the like furnace in an iron mill.Type: GrantFiled: May 9, 2000Date of Patent: August 5, 2003Assignees: Nippon Steel Corporation, Yamamoto Rock Machine Co. Ltd., Nittetsu Plant Designing CorporationInventors: Manabu Gotou, Keisuke Morimitsu, Hiromi Kawakami, Tuneo Iwasaki, Kazuo Haga, Yoshiichi Yatagai, Manpei Hontani, Hiroyuki Takao
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Patent number: 4742706Abstract: A device for imparting strain to a steel sheet by which deformed regions spaced at a desired distance and having a minute linear shape are continuously formed, comprising: a strain imparting roll having projected portions on the surface thereof; a press roll provided opposite to the strain imparting roll; a row of a plurality of groups of back-up rolls for pressing against the press rolls, provided with spaces of a desired distance therebetween in a longitudinal direction of the press roll; and a fluid pressure cylinder connected to each group of the back-up rolls via a bearing, and a fluid supply source connected to the fluid pressure cylinder.Type: GrantFiled: April 29, 1986Date of Patent: May 10, 1988Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Eiji Sasaki, Mitsuo Murata, Hisashi Kobayashi, Katsuro Kuroki, Hisao Kitsunezaki, Kengo Yoshioka, Mikio Nakamura
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Patent number: 4337928Abstract: An apparatus for changing the charge distribution in a blast furnace is constituted by a large number of arms disposed in a circle in the top of the furnace, the upper end of each arm being attached to the shell of the furnace through a link so as to be tiltable relative to the shell, a plate fixed to the lower portion of the arm and facing toward the center of the furnace, and a mechanism including a push rod for inclining the arm with respect to the axis of the furnace in a direction for pushing the lower portion of the arm toward the furnace center. The link, arm and push rod make up a link mechanism. The linear motion of the push rod expands the paired link and arm and inclines the plate while pushing the plate inward.Type: GrantFiled: April 25, 1980Date of Patent: July 6, 1982Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventor: Kyoichi Ando
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Patent number: 4330112Abstract: Method and apparatus for cooling a steel strip in a continuous annealing line, which has a first cooling step in which the steel strip immediately after an overageing treatment is cooled from the overageing temperature to a temperature in the range of from about 95.degree. C. to 60.degree. C., a temperature which prevents a surface oxidation but allows self-drying of the strip, in a protective atmosphere using a liquid coolant; and a second cooling step in which the steel strip is cooled to a temperature suitable for a subsequent temper rolling using liquid coolant at a temperature no higher than 40.degree. C.Type: GrantFiled: December 27, 1979Date of Patent: May 18, 1982Assignees: Nippon Steel Corporation, Nittetsu Plant Designing CorporationInventors: Tohoru Toshimitsu, Norichika Nagira, Kenji Ueda