Patents Assigned to Taiheiyo Cement Corporation
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Patent number: 7837963Abstract: A method to efficiently reduce lead content of cement without exerting influence upon quality of the cement. The method comprises the steps of: controlling O2 concentration of combustion gas in an inlet end of a cement kiln to 5% or lower and/or CO concentration thereof 1000 ppm or more; extracting a part of combustion gas from the cement kiln and collecting dust contained in the combustion gas; and collecting lead from the dust collected. With this, the area where raw material temperature in the cement kiln is between 800° and 1100° can be turned into reducing atmosphere to sharply increase volatilization rate of lead, and collection of lead from the dust allows lead content of cement to efficiently be reduced without exerting influence upon quality of the cement.Type: GrantFiled: October 19, 2007Date of Patent: November 23, 2010Assignee: Taiheiyo Cement CorporationInventors: Junichi Terasaki, Hajime Wada, Takahiro Hayashida, Soichiro Okamura
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Publication number: 20100282130Abstract: It is aimed at providing a heavy concrete, which does not require addition of a thickener such as methyl cellulose, which is less in segregation between a heavy aggregate and a cement paste, and which is high in flowability and excellent in construction ability. The present invention provides a heavy concrete comprising, at least, a cement, a heavy aggregate, and water, mixed with one another, characterized in that the heavy fine aggregate includes hot scarves brought about in a scarfing process of a steel slab surface. The present invention further provides the above-described heavy concrete characterized in that the heavy fine aggregate includes fine aggregate particles passing through a sieve having a nominal size of 0.15 mm, in an amount of 10% to 20% in mass percentage, and the heavy fine aggregate includes spherical particles each having a distortion irregularity of 3.Type: ApplicationFiled: January 26, 2009Publication date: November 11, 2010Applicant: Taiheiyo Cement CorporationInventors: Yasuhide Higo, Minoru Yoshimoto, Takeshi Hamada, Eichi Manabe
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Patent number: 7789944Abstract: A treatment system to efficiently remove lead from dust contained in extracted cement kiln combustion gas while reducing facility and running costs. A treatment system 1 comprising: a probe 3 for extracting a part of combustion gas, while cooling it, from a kiln exhaust gas passage, which runs from an inlet end of a cement kiln to a bottom cyclone; a classifier 5 for separating coarse powder from dust contained in the combustion gas extracted by the probe 3; a wet dust collector 6 for collecting dust from the extracted gas containing fine powder discharged from the classifier 5; and devices 12, 13 for feeding sulfurizing agent for sulfurizing lead contained in the kiln exhaust gas to the wet dust collector 6, and others. From the sulfurizing-agent feeders 12, 13 are preferably added the sulfurizing agents to a circulation liquid tank 7 or a pump 9 for circulating slurry.Type: GrantFiled: September 20, 2005Date of Patent: September 7, 2010Assignee: Taiheiyo Cement CorporationInventors: Shinichiro Saito, Soichiro Okamura, Tsuyoshi Matsura
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Patent number: 7749311Abstract: A treatment system to efficiently remove lead from dust contained in extracted cement kiln combustion gas while reducing facility and running costs. A treatment system 1 comprising a probe 3 for extracting a part of combustion gas, while cooling it, from a kiln exhaust gas passage, which runs from an inlet end of a cement kiln to a bottom cyclone; a first classifier 5 for separating coarse powder from dust contained in the combustion gas extracted; a dust collector 7 for collecting dust from the extracted gas containing fine powder discharged from the first classifier 5; and a second classifier 8 for dividing dust discharged from the dust collector 7 into fine powder and coarse powder, and others. Since more lead is distributed on the fine powder side classified by the second classifier 8, lead can efficiently be removed without using chemicals and the like.Type: GrantFiled: September 20, 2005Date of Patent: July 6, 2010Assignee: Taiheiyo Cement CorporationInventors: Shinichiro Saito, Keizo Fujiwara
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Publication number: 20100135898Abstract: Disclosed is a method for producing a metal hydride, which enables to obtain a metal hydride from a metal imide or a metal amide. Specifically, in an air current containing a hydrogen gas having a hydrogen partial pressure of 0.1 MPa or greater, hydrogen is reacted with one or both of a metal imide and a metal amide, thereby producing a metal hydride. The metal constituting the metal amide and the metal imide is preferably lithium, sodium or potassium.Type: ApplicationFiled: March 14, 2008Publication date: June 3, 2010Applicants: TAIHEIYO CEMENT CORPORATION, HIROSHIMA UNIVERSITYInventors: Yoshitsugu Kojima, Hironobu Fujii, Takayuki Ichikawa, Satoshi Hino, Haiyan Leng, Kyoichi Tange, Chie Omatsu
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Patent number: 7722717Abstract: A hydraulic composition including: a ground burned product A having a hydraulic modulus (H.M.) of 1.8 to 2.3, a silica modulus (S.M.) of 1.3 to 2.3 and an iron modulus (I.M.) of 1.3 to 2.8; and a gypsum. The hydraulic composition is capable of reducing heat of hydration and producing a mortar or a concrete excellent in flowability and strength development.Type: GrantFiled: September 30, 2004Date of Patent: May 25, 2010Assignee: Taiheiyo Cement CorporationInventors: Daisuke Sawaki, Susumu Sano, Kenichi Homma, Kouki Ichitsubo, Kenichi Matsumoto, Makihiko Ichikawa
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Patent number: 7703610Abstract: Disclosed is a method for removal of an unburned carbon contained in a fly ash material. The method comprises the steps of adding water to the fly ash to prepare a fly ash slurry; shearing the fly ash slurry using an agitating blade that can rotate at a high speed to generate an active energy on the surface of an unburned carbon by the shearing force, thereby imparting lipophilicity to the unburned carbon; and adding a collecting agent and a foaming agent to the slurry containing the lipophylized unburned carbon to cause the attachment of the collecting agent to the lipophylized unburned carbon, and at the same time, causing the attachment of the unburned carbon having the collecting agent attached thereto an air bubble to separate the unburned carbon by flotation.Type: GrantFiled: December 11, 2006Date of Patent: April 27, 2010Assignees: Mitsui Engineering & Shipbuilding Co., Ltd., Taiheiyo Cement CorporationInventors: Kazuyoshi Matsuo, Kazuo Abe, Takao Suzuki, Shinichiro Saito
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Publication number: 20100095872Abstract: To effectively utilize coal ash while reducing mercury concentration in cement kiln exhaust gas. Coal ash is received from a thermal power plant or the like; the received coal ash is separated into ash and unburned carbon; the separated ash is utilized in a cement manufacturing facility as a cement raw material; and the separated unburned carbon is utilized in the cement manufacturing facility in accordance with mercury concentration in gas exhausted from a cement kiln of the cement manufacturing facility. In case that the mercury concentration in the gas exhausted from the cement kiln of the cement manufacturing facility is high, in the coal ash, unburned carbon with high mercury content can be treated in facilities other than the cement manufacturing facility without feeding the unburned carbon to the cement manufacturing facility, or the quantity of such unburned carbon fed to the cement manufacturing facility can be adjusted.Type: ApplicationFiled: November 30, 2007Publication date: April 22, 2010Applicant: Taiheiyo Cement CorporationInventors: Tomomichi Nakamura, Hisashi Kondo, Shinichiro Saito
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Publication number: 20100032385Abstract: To provide a cement burning apparatus and a method of method of drying high-water-content organic waste capable of drying organic waste with high water content precluding the possibility of explosion; not incurring decreased thermal efficiency of a cement kiln; and more efficiently drying organic waste with high water content. The cement burning apparatus 1 comprises a dryer 6, to which combustion gas is fed from an exhaust gas passage, which runs from an outlet duct of a calciner 4 to an outlet duct of a preheater 3 of a cement kiln 2, for drying high-water-content organic waste of which water content is 40 mass percent or more. As the dryer 6, a grinding-type flash dryer, which directly contacts the combustion gas G with the organic waste W and dries the organic waste W while grinding it, can be used.Type: ApplicationFiled: June 26, 2007Publication date: February 11, 2010Applicant: TAIHEIYO CEMENT CORPORATIONInventors: Naoki Ueno, Yoshihito Izawa, Hiroyuki Takano, Hirofumi Mori
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Publication number: 20090169453Abstract: A combustion exhaust gas processing device to efficiently remove harmful substances such as dust, NOx, persistent organic pollutants, a volatile organic compound and CO in cement kiln combustion exhaust gas, thereby holding down facility cost and operating cost low. The combustion exhaust gas processing device 1 comprises: a dust collector 6 collecting dust in a cement kiln combustion exhaust gas G1; a wet dust collector 7 as a catalyst-poisoning-substance stripper removing a catalyst-poisoning substance from a combustion exhaust gas G2 which passed the dust collector 6; preheaters 10 and 11 heating beforehand a combustion exhaust gas G3 which passed the wet dust collector 7; and a catalyst device 12 from which NOx, a persistent organic pollutant, etc. in the preheated combustion exhaust gas, are removed. A titanium-vanadium catalyst etc. as an oxide catalyst is used upstream of the catalyst device 12, and a platinum catalyst etc. as a noble-metal catalyst downstream of the catalyst device 12.Type: ApplicationFiled: December 27, 2005Publication date: July 2, 2009Applicants: Taiheiyo Cement Corporation, Nippon Shokubai Co., Ltd.Inventors: Shinichiro Saito, Yasuhiro Uchiyama, Junichi Terasaki, Hisashi Kondo, Mitsuharu Hagi, Shinyuki Masaki
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Patent number: 7537748Abstract: A hydrogen storage matter contains at least a nano-structured and organized lithium imide compound precursor complex. In the hydrogen stroge matter, the lithium imide compound precursor complex has been nano-structured and organized by mixing fine powder lithium amide with fine powder lithium hydride at a predetermined ratio to prepare a mixture as a starting material, and then processing the mixture by a predetermined complex formation processing method.Type: GrantFiled: February 9, 2006Date of Patent: May 26, 2009Assignees: National University Corporation, Hiroshima University, Taiheiyo Cement CorporationInventors: Hironobu Fujii, Takayuki Ichikawa, Haiyan Leng, Shigehito Isobe, Nobuko Hanada, Toyoyuki Kubokawa, Kazuhiko Tokoyoda, Keisuke Okamoto, Shinkichi Tanabe, Shigeru Matsuura, Kenji Ogawa
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Patent number: 7535155Abstract: There are provided a piezoelectric device, in which piezoelectric element surfaces are prevented from cracking and warping by reducing tensile stress generated within the piezoelectric element by an external force, and a piezoelectric switch utilizing the same. The piezoelectric device comprises a piezoelectric element having a plate-like shape including a piezoelectric body having a plate-like shape and polarized in a thickness direction thereof and a pair of electrodes formed on both main surfaces of the piezoelectric body, and a pair of elastic conductive members fixed to the both main surfaces of the piezoelectric element, wherein when an external force is applied, the piezoelectric body is deformed to generate electricity.Type: GrantFiled: July 11, 2005Date of Patent: May 19, 2009Assignee: Taiheiyo Cement CorporationInventor: Katsuyuki Ishikawa
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Publication number: 20090031932Abstract: A method for handling a substance from which a combustible gas volatilizes. A method for handling a substance from which a combustible gas volatilizes, in which, when such substance is handled inside an apparatus with a high degree of hermeticity, air is introduced into the apparatus and the substance is handled in a state in which the volatilized combustible gas is diluted to a concentration at which neither explosion nor fire occurs. With this method for handling a substance from which a combustible gas volatilizes, the combustible gas is diluted with air to a concentration at which neither explosion nor fire occurs, without using inactive gases such as nitrogen or carbon dioxide that have to be produced or purchased. Therefore, a substance from which a combustible gas volatilizes can be inexpensively and safely handled in operations such as mixing and storing.Type: ApplicationFiled: February 26, 2007Publication date: February 5, 2009Applicant: TAIHEIYO CEMENT CORPORATIONInventors: Hirofumi Mori, Eiji Fukuda, Makoto Kagamida, Katsumi Aono
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Publication number: 20080308012Abstract: A burnt product is produced by burning a raw material containing chromium, in which the fine-grained portion is removed. Even in the burnt product produced from a raw material containing chromium, the chromium (VI) content is reduced.Type: ApplicationFiled: March 8, 2006Publication date: December 18, 2008Applicant: Taiheiyo Cement CorporationInventors: Takayoshi Okamura, Masahiko Moriya, Satoshi Yamazaki, Kota Sasaki, Makoto Kobayakawa, Kenichi Honma
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Patent number: 7465350Abstract: A hydraulic composition of the present invention includes (A) 100 parts by weight of cement having a Blaine specific surface area of 2,500 to 5,000 cm2/g, (B) 10 to 40 parts by weight of fine particles having a BET specific surface area of 5 to 25 m2/g, and (C) 15 to 55 parts by weight of inorganic particles having a Blaine specific surface area which is 2,500 to 30,000 cm2/g and which is larger than that of the cement. The inorganic particles (C) may comprise 10 to 50 parts by weight of inorganic particles (C1) having a Blaine specific surface area of 5,000 to 30,000 cm2/g and 5 to 35 parts by weight of inorganic particles (C2) having a Blaine specific surface area of 2,500 to 5,000 cm2/g.Type: GrantFiled: May 29, 2002Date of Patent: December 16, 2008Assignee: Taiheiyo Cement CorporationInventors: Masami Uzawa, Tetsuro Hyodo
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Publication number: 20080276676Abstract: A soil improvement material comprising a ground burned product A and gypsum, the burned product A having a hydraulic modulus (H.M.) of 1.8 to 2.3, a silica modulus (S.M.) of 1.3 to 2.3, and an iron modulus (I.M.) of 1.3 to 2.8. The soil improvement material is useful for improving the ground, especially through solidifying soft soil, such as water-rich soil or organic-rich soil.Type: ApplicationFiled: October 4, 2004Publication date: November 13, 2008Applicant: TAIHEIYO CEMENT CORPORATIONInventors: Daisuke Sawaki, Susumu Sano, Kenichi Homma, Kouki Ichitsubo, Kenichi Matsumoto, Makihiko Ichikawa
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Patent number: 7355326Abstract: A piezoelectric transformer, which operates in a half wavelength mode, includes an input part having input electrodes laminated in a thickness direction on a central part in a longitudinal direction of a piezoelectric element with rectangular shape, in which the input part is polarized in the thickness direction between the input electrodes, a pair of output parts provided along the longitudinal direction so as to sandwich the input part, in which the output parts are polarized in the same direction along the longitudinal direction, and an output electrode provided at an end part of each of the output parts, wherein L1, L2 and L3 satisfy a relationship of 0.1?(4L2?L3)/4L1?0.5, where L1 is a length of the piezoelectric element in the longitudinal direction, L2 is a length of the input part in the longitudinal direction, and L3 is a length of either one of the output electrodes in the longitudinal direction.Type: GrantFiled: September 24, 2004Date of Patent: April 8, 2008Assignee: Taiheiyo Cement CorporationInventors: Takeshi Fujimura, Masaaki Toyama
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Patent number: 7285141Abstract: A cement kiln from which its brick lining has been removed, or a rotary dryer for cement production is used as a fermentation treatment apparatus 202 for converting waste matter into compost. The waste matter to be subjected to the fermentation treatment includes city waste contained in garbage bags, and its fermentation treatment is carried out by introducing the waste matter directly into the aforesaid cement kiln or the aforesaid rotary dryer for cement production without tearing the aforesaid garbage bags.Type: GrantFiled: March 20, 2002Date of Patent: October 23, 2007Assignee: Taiheiyo Cement CorporationInventors: Masayoshi Arai, Tatsuro Watanabe, Akira Saito, Sachio Nakazaki, Toshihisa Maruta, Hiroyuki Takano
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Publication number: 20070207601Abstract: In a stage member for use in an exposure apparatus, a honeycomb structural body has walls that are extended in a direction perpendicular to a longitudinal direction of the stage member and that surround square shaped prismatic spaces, so as to accomplish a high resistance and a high resonant frequency with respect to torsional vibration. The honeycomb structural body of the stage member is preferably made of a ceramic material.Type: ApplicationFiled: June 16, 2005Publication date: September 6, 2007Applicants: TOHOKU UNIVERSITY, NIHON CERATEC CO., LTD., TAIHEIYO CEMENT CORPORATIONInventors: Tadahiro Ohmi, Kiwamu Takehisa, Shirou Moriyama, Shunichi Sasaki, Masataka Hirose, Ishii Mamoru, Tomoyuki Sugaya, Masako Kataoka, Motohiro Umezu
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Patent number: 7265254Abstract: Chlorine-containing waste is processed inside a heating device, an alkali metal compound and a calcium compound are given into the heating device while the temperature of a solid phase inside the heating device is maintained at 400 to 1500° C., chlorine that is contained in the chlorine-containing waste and that has not been bound by the alkali metal compound is bound in the solid phase by the calcium compound, and chlorine is converted into alkali metal chloride from calcium chloride generated in the course of the processing of the chlorine-containing waste.Type: GrantFiled: July 30, 2002Date of Patent: September 4, 2007Assignee: Taiheiyo Cement CorporationInventors: Yasushi Yamamoto, Hisanori Aoyama, Tomohisa Yoshikawa, Takemi Aizawa, Takamiki Tamashige, Norihiko Misaki, Michio Matsuno, Yoshimasa Muraoka