Sintering Patents (Class 75/758)
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Patent number: 10718512Abstract: A method of operating a burner assembly is provided. The method generally includes transporting combustible fuel and atomization air through concentric fluid lines of the burner assembly; mixing the combustible fuel and the atomization air to atomize the combustible fuel; adjusting a flow of the combustible fuel and the atomization air to obtain atomized fuel with an air-to-fuel atomization ratio of less than 0.6; outputting the atomized fuel from a nozzle of the burner assembly; and igniting the atomized fuel to produce a flame. A burner assembly operable by the method, and a corresponding nozzle are also provided.Type: GrantFiled: April 5, 2017Date of Patent: July 21, 2020Assignee: Metal 7 Inc.Inventors: Éric Dorval, Steve Beaudin, Guy De Carufel
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Patent number: 8986605Abstract: Disclosed herein is a method and gas atmosphere for a metal component in a continuous furnace. In one embodiment, the method and gas atmosphere comprises the use of an effective amount, or about 1 to about 10 percent volume of endo-gas, into an atmosphere comprising nitrogen and hydrogen. In another embodiment, there is provided a method sintering metal components in a furnace at a one or more operating temperatures comprising: providing a furnace comprising a belt comprising a wire mesh material wherein the metal components are supported thereupon; and sintering the components in the furnace in an atmosphere comprising nitrogen, hydrogen, and effective amount of endothermic gas at the one or more operating temperatures ranging from about 1800° F. to about 2200° F. wherein the amount of endothermic gas in the atmosphere is such that it is oxidizing to the wire mesh material and reducing to the metal components.Type: GrantFiled: December 13, 2010Date of Patent: March 24, 2015Assignee: Air Products and Chemicals, Inc.Inventors: Donald James Bowe, Anna K. Wehr-Aukland, John Lewis Green
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Patent number: 6863710Abstract: A method of improving the sintering of mineral bearing ore which comprises the addition of an aqueous solution of a transition metal sulfate, preferable copper sulfate, to the sinter base mix or to the sinter trim feed is disclosed.Type: GrantFiled: October 22, 2003Date of Patent: March 8, 2005Assignee: GE Betz, Inc.Inventors: Margan K. Muthukumaraswamy, Mark A. Rohanna, Binod K. Das, Ashok Kumar, Harjit S. Sandhu
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Patent number: 6581779Abstract: In a method of the magnetic loading of a sintering material, magnetically susceptible sinterable substances of high magnetization and fine substances of slidable dropping at low speed are segregated in great amounts in an upper portion of a sintering material layer deposited on a pallet. More of magnetically susceptible sinterable substances such as mill scale, returned ore and the like of good magnetic attachment and fine substances of low drop speed are caused to be segregated in the upper portion of that layer. A magnetic force is applied to a starting sintering material, during movement of the latter having been facilitated in its particle size segregation on a sloping chute, by means of a cylindrical magnetic drum having built therein a permanent magnet and disposed downwardly of the sloping chute.Type: GrantFiled: April 26, 2001Date of Patent: June 24, 2003Assignee: Kawasaki Steel CorporationInventors: Nobuyuki Oyama, Kouichi Nushiro, Katsutoshi Igawa, Seiji Taguchi, Norifumi Fujii, Kenji Takihira, Rikio Ono, Takahiro Kumeda
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Publication number: 20030041693Abstract: A method for agglomerating and sintering iron and zinc ore and ore concentrates, steel mill ferrous waste and zinc mill waste. The method has the steps: a) mixing the wastes or ore with a combustion fuel source, and a sinter agglomeration agent selected from the group consisting of sodium silicate, water soluble polymers and aqueous emulsions of oils to form an agglomerated sinterable mixture comprising agglomerated particles; b) forming the sinterable mixture into a sinter bed on the grate of a sinter machine; and c) igniting the sinter bed to create a temperature sufficient to sinter the agglomerated particles.Type: ApplicationFiled: September 3, 2002Publication date: March 6, 2003Inventor: Donald C. Roe
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Patent number: 6447852Abstract: The present invention relates to a method for manufacturing a diamond composite from diamond particles, comprising the steps of forming a work piece, heating the work piece and controlling the heating temperature and heating time so that a certain desired amount of graphite is created by graphitization of diamond particles, thereby creating an intermediate body, and infiltrating silicon or silicon alloy into the intermediate body. The invention also relates to a diamond composite produced by this method.Type: GrantFiled: March 4, 1999Date of Patent: September 10, 2002Assignee: Ambler Technologies, Inc.Inventors: Sergey Konstantinovitch Gordeev, Sergey Germanovitch Zhukov, Lija Vladimirovna Danchukova, Thommy Ekström
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Publication number: 20020104783Abstract: In a method of the magnetic loading of a sintering material, magnetically susceptible sinterable substances of high magnetization and fine substances of slidable dropping at low speed are segregated in great amounts in an upper portion of a sintering material layer deposited on a pallet. More of magnetically susceptible sinterable substances such as mill scale, returned ore and the like of good magnetic attachment and fine substances of low drop speed are caused to be segregated in the upper portion of that layer. A magnetic force is applied to a starting sintering material, during movement of the latter having been facilitated in its particle size segregation on a sloping chute, by means of a cylindrical magnetic drum having built therein a permanent magnet and disposed downwardly of the sloping chute.Type: ApplicationFiled: April 26, 2001Publication date: August 8, 2002Inventors: Nobuyuki Oyama, Kouichi Nushiro, Katsutoshi Igawa, Seiji Taguchi, Norifumi Fujii, Kenji Takihira, Rikio Ono, Takahiro Kumeda
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Patent number: 6349833Abstract: In a method of the magnetic loading of a sintering material, magnetically susceptible sinterable substances of high magnetization and fine substances of slidable dropping at low speed are segregated in great amounts in an upper portion of a sintering material layer deposited on a pallet. More of magnetically susceptible sinterable substances such as mill scale, returned ore and the like of good magnetic attachment and fine substances of low drop speed are caused to be segregated in the upper portion of that layer. A magnetic force is applied to a starting sintering material, during movement of the latter having been facilitated in its particle size segregation on a sloping chute, by use of a cylindrical magnetic drum having built therein a permanent magnet and disposed downwardly of the sloping chute.Type: GrantFiled: June 22, 1998Date of Patent: February 26, 2002Assignee: Kawasaki Steel CorporationInventors: Nobuyuki Oyama, Kouichi Nushiro, Katsutoshi Igawa, Seiji Taguchi, Norifumi Fujii, Kenji Takihira, Rikio Ono, Takahiro Kumeda
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Patent number: 5773099Abstract: A dental care material comprising a titanium sintered body has no harmful effects on the human body and easily produces products with complicated shapes having a high level of strength. A mixture of titanium powder and an organic binder is injection molded and subjected to binder removal and sintering processes to form a bracket for orthodontic or dental implant materials. Pure titanium powder, with an average granule diameter of no more than 40 .mu.m, a carbon content by weight of no more than 0.3%, and an oxygen content by weight of no more than 0.6%, preferably is used to produce a titanium sintered body of combined carbon and oxygen content by weight of no more than 1.0%. Colored layers can be formed on the surface of the titanium sintered body using various methods as needed.Type: GrantFiled: April 25, 1996Date of Patent: June 30, 1998Assignees: Injex Corporation, Matsumoto Dental CollegeInventors: Naoki Tanaka, Hiroshi Ohtsubo, Michio Ito
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Patent number: 5666638Abstract: The present invention relates to a method for making sponge iron briquettes from fine ore with a maximum grain size of less than 2 mm, preferably less than 0.5 mm, wherein hot fine ore is fed to a roller press comprising two press rolls and is briquetted by opposite briquette pockets of the press rolls in the nip to form sponge iron briquettes. The direct pressing of fine ore into sponge iron briquettes has largely been unknown in the prior art. The invention proposes that one of the press rolls be operated as a loose roll which is substantially movable in a direction transverse to the roller axis, the nip adapting to the amount of material supplied to the press rolls and the nip substantially having such a mean width that a briquette strip is produced. In comparison with a former method, the method of the invention achieves a markedly increased service life of the molding bodies which are provided with press pockets.Type: GrantFiled: August 7, 1995Date of Patent: September 9, 1997Assignee: Maschinenfabrik Koppern GmbH & Co. KGInventor: Hans Georg Bergendahl
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Patent number: 5630202Abstract: The present invention relates to a method for making sponge iron briquettes from fine ore with a maximum grain size of less than 2 mm, preferably less than 0.5 mm, wherein hot fine ore is fed to a roller press and is briquetted by the roller press to form sponge iron briquettes. Apart from briquettes, fine ore which is compacted in the spaces of briquette pockets of the roller press, as well as fines in dust form are produced during briquetting. These components are designated as returns and separated from the sponge iron briquettes. The returns are then fed to the fine ferrous ore prior to briquetting. The processing of fine ore has so far entailed great problems in the technical field. The invention suggests that the returns be directly fed to a conveyor system after having been separated from the sponge iron briquettes and that the returns which are still hot be fed by the conveyor system substantially evenly and continuously to the hot fine ore to be still briquetted.Type: GrantFiled: July 7, 1995Date of Patent: May 13, 1997Assignee: Maschinenfabrik Koppern GmbH & Co. KGInventor: Hans G. Bergendahl
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Patent number: 5520719Abstract: The present invention relates to a method for sintering an iron scrap in a process for producing a sintered ore which is used as a raw material in ironmaking in a blast furnace. Zn contained in the iron scrap is removed in the step of sintering to enable a light-weight iron scrap to be used in a large quantity in the blast furnace and, at the same time, to enhance the yield of sintered ore in the step of sintering.In the production of a sintered ore as a raw material for use in a blast furnace by using a Dweight-Lloyd sintering machine, a mixture obtained by mixing a fine debris of an iron scrap with a raw material for a sintered ore is placed on a pallet to produce a scrap-bearing sintered ore. The mixture may be incorporated in a packed bed in its entirety, in its upper bed alone or in its lower bed alone. The iron scrap is fixed to the sintered ore and used as a material for use in a blast furnace.Type: GrantFiled: April 29, 1994Date of Patent: May 28, 1996Assignee: Nippon Steel CorporationInventors: Yoshio Okuno, Masami Fujimoto
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Patent number: 5476533Abstract: A sinterable mixture comprising iron-containing materials and solid fuel is sintered on a sintering machine; to decrease the rate at which exhaust gas is to be removed and to produce a desirable sinter, a part of the exhaust gas is enriched to an oxygen content of up to 24% by the addition of higher-oxygen gases and is then recirculated as a recycle gas, and exhaust gas is removed as a tail gas from the process only at a rate which corresponds to the rate of the gas which is formed during the sintering process plus the rate of the gas added for enriching plus the rate of inleaked air which has infiltrated from the outside minus the rate of oxygen consumption.Type: GrantFiled: October 2, 1992Date of Patent: December 19, 1995Assignee: Metallgesellschaft AktiengesellschaftInventors: Fred Stieler, Norbert Magedanz, Walter Gerlach, Jurgen Otto, Martin Hirsch, Fred Cappel, Detlev Schlebusch, Hermann Schmidt, Heiko Weisel, Hans-Joachim Werz
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Patent number: 5223019Abstract: A sintering method, which includes igniting a layer of raw materials and providing a downwardly directed air suction is improved by applying a magnetic field to the materials for which a predetermined amount of sintering has been completed in the upper region of the layer of raw materials. The sintering is continued while a magnetic floating force is applied to such sintered cakes. An apparatus for carrying out the method is provided.Type: GrantFiled: September 16, 1991Date of Patent: June 29, 1993Assignee: Nippon Steel CorporationInventors: Tadahiro Inazumi, Masami Fujimoto, Shuuichi Satou, Keiji Satou
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Patent number: 4925487Abstract: The separation rate of electrostatic precipitators associated with sintering plants is improved in that the exhaust gas is conditioned by means of solid particles. For that purpose, part of the coke breeze as a fuel for the sintering process is branched off, separately ground, supplied to the exhaust gases to be dedusted, collected together with the dust in the electrostatic precipitators and returned to the sintering process.Type: GrantFiled: February 17, 1989Date of Patent: May 15, 1990Assignee: Metallgesellschaft AktiengesellschaftInventor: Hermann Schmidt