Fluidized Zone Patents (Class 266/172)
  • Patent number: 10100379
    Abstract: A system and method for the fluidized direct reduction of iron ore concentrate powder. A two-phase fluidized bed is used for the direct reduction of iron ore concentrate powder. Each phase of the fluidized bed is formed by a bubbling bed and a circulating bed. Use of serial-connection processing involving gas and of high-gas-velocity processing of the circulating bed increase the gas utilization rate and the reduction efficiency of single-phase reduction. Once reduced gases are subjected to preheating, each gas is sent into an initial reduction phase and a final reduction phase so as to implement reduction of minerals. Use of mixed-connection processing involving gas appropriately reduces processing pressure. Hot flue gas produced by combustion in a gas heater is sent to a mineral pre-heating system that is used for pre-heating iron ore concentrate powder.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: October 16, 2018
    Assignees: INSTITUTE OF PROCESS ENGINEERING, CHINESE ACADEMY OF SCIENCES, BEIJING ZHONGKAIHONGDE TECHNOLOGY CO., LTD.
    Inventors: Qingshan Zhu, Chuanlin Fan, Hongzhong Li, Zhaohui Xie, Wenheng Mu, Cunhu Wang, Xingang Jiao
  • Patent number: 9512496
    Abstract: A method for introducing fine particulate material (4) of ferruginous particles into a fluidized bed reduction unit (1) having a fluidized bed (24), wherein the temperature in the fluidized bed (24) is more than 300° C., and wherein the fine particulate material (4) is introduced directly into the fluidized bed (24) and/or into a free space (25) above the fluidized bed (24) by means of a burner (2). The method may be used for producing liquid pig iron (17) or liquid steel precursor products (18) by a smelting reduction process in a smelting reduction unit (22).
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: December 6, 2016
    Assignee: PRIMETALS TECHNOLOGIES AUSTRIA GMBH
    Inventors: Franz Hauzenberger, Robert Millner, Jan-Friedemann Plaul, Norbert Rein
  • Publication number: 20150135899
    Abstract: A method for introducing fine particulate material (4) of ferruginous particles into a fluidized bed reduction unit (1) having a fluidized bed (24), wherein the temperature in the fluidized bed (24) is more than 300° C., and wherein the fine particulate material (4) is introduced directly into the fluidized bed (24) and/or into a free space (25) above the fluidized bed (24) by means of a burner (2). The method may be used for producing liquid pig iron (17) or liquid steel precursor products (18) by a smelting reduction process in a smelting reduction unit (22).
    Type: Application
    Filed: April 4, 2013
    Publication date: May 21, 2015
    Inventors: Franz Hauzenberger, Robert Millner, Jan-Friedemann Plaul, Norbert Rein
  • Publication number: 20150114180
    Abstract: Apparatus for production of metal sponge or pig iron from metal oxide containing material in piece form using a reduction gas. A reduction reactor shaft (1); reduction gas inlet lines into the interior of the reduction reactor shaft (1); a reduction gas channel body (11) passes through the interior of the reduction reactor shaft (1) for distributing reduction gas; a reduction gas supply line for reduction gas and located below the reduction gas channel body (11) at at least one inner-wall end of the reduction gas channel body (11). The reduction gas channel body (11) has a carrier tube through which a cooling medium can flow. A first portion of the reduction gas is introduced into the bed by reduction gas inlet lines which end in the interior of the reduction reactor shaft. A second portion of the reduction gas is distributed into the bed by the reduction gas channel body.
    Type: Application
    Filed: April 18, 2013
    Publication date: April 30, 2015
    Inventors: Georg Aichinger, Karl-Heinz Beham, Reinhard Pum, Wolfgang Sterrer, Kurt Wieder, Johann Wurm
  • Patent number: 8926728
    Abstract: A process for producing hot metal includes partially reducing granular raw materials containing iron oxide with a carbonaceous reducing agent in a fluidized bed reactor at a temperature of at least 850° C. so as to obtain a reduced mixture. The reduced mixture is cooled to between 600° C. and 800° C. in a heat exchanger apparatus using a preheated process gas as a cooling medium that is preheated to between 300° C. and 500° C. before being introduced into the heat exchanger apparatus. The reduced mixture is then supplied to a smelting reduction unit via a discharge system.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: January 6, 2015
    Assignee: Outotec Oyj
    Inventors: Jean-Paul Nepper, Tobias Stefan
  • Patent number: 8871042
    Abstract: A heat treatment apparatus 10 for heat treating metals or metallic components includes a fluidized bed furnace 20 and a removable insert 30 which is accommodated within the fluidized bed 50 of the furnace 20. The removable insert 30 enables the geometry of the fluidized bed 50 to be optimized with respect to the size and shape of a component 70 which is to be heated.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: October 28, 2014
    Assignee: Rolls-Royce PLC
    Inventor: Richard Gordon Milburn
  • Patent number: 8361189
    Abstract: The invention relates to an apparatus for producing metals and/or primary metal products, in particular pig iron and/or primary pig iron products, in which a metal-containing charge material, in particular in fine particle form, is introduced, using pneumatic conveying, by means of a carrier gas stream, in the form of a stream of medium formed from the charge material and the carrier gas stream, into a melting unit, in particular a melter gasifier, for further processing. According to the invention, the charge material is introduced after the carrier gas stream has been separated off and separately at at least two introduction points, so that at least two partial quantities of the charge material can be introduced independently of one another and continuously or in stacked form.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: January 29, 2013
    Assignee: Siemens Vai Metals Technologies GmbH
    Inventors: Martin Schmidt, Johannes Schenk, Franz Hauzenberger, Josef Stockinger, Johann Wurm
  • Patent number: 8313552
    Abstract: A method and an apparatus for the production and the melting of liquid pig iron or of liquid steel intermediate products in a melt-down gasifier, with the introduction of oxygen-containing gas streams through oxygen nozzles into the solid bed. At least one oxygen nozzle has a single gas supply and introduces at least two gas streams. Using plural gas streams from a nozzle reduces the risk of fluidization of the solid bed because the number of gas raceways in materials in the gasifier is increased.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: November 20, 2012
    Assignees: Siemens Vai Metals Technologies GmbH, Posco
    Inventor: Leopold Werner Kepplinger
  • Patent number: 8236090
    Abstract: The invention relates to a process and an associated apparatus for producing metals and/or primary metal products, in particular pig iron and/or primary pig iron products, in which a metal-containing charge material, in particular in fine particle form, is introduced, using pneumatic conveying, by means of a carrier gas stream, in the form of a stream of medium formed from the charge material and the carrier gas stream, into a melting unit, in particular a melter gasifier, for further processing. According to the invention, the charge material is introduced after the carrier gas stream has been separated off and separately at at least two introduction points, so that at least two partial quantities of the charge material can be introduced independently of one another and continuously or in stacked form.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: August 7, 2012
    Assignee: Siemens Vai Metals Technologies GmbH
    Inventors: Martin Schmidt, Johannes Schenk, Franz Hauzenberger, Josef Stockinger, Johann Wurm
  • Patent number: 8221674
    Abstract: A distributor bottom, particularly a nozzle-type distributor bottom, for steadily introducing process gas, especially process gas loaded with solid particles, into a process chamber, optionally to create a fluidized bed. The process chamber is disposed above the distributor bottom and is formed by walls of a reactor used for metallurgically, particularly thermally, treating feedstock. The distributor bottom is provided with a plurality of holes. Holes are arranged near the walls to prevent substances from attaching to the reactor walls. Special arrangements relate to nozzles and ducts.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: July 17, 2012
    Assignee: Siemens Vai Metals Technologies GmbH
    Inventors: Franz Hauzenberger, Karl Zehetbauer, Jun Hyuk Lee, Myoung Kyun Shin, Won Namkung, Minyoung Cho, Sun-Kwang Jeong, Nag Joon Choi, Hang Goo Kim
  • Patent number: 8187527
    Abstract: A modular air fluidized sand bed for the heat treatment of metal products is disclosed. This technology provides for the heat-treatment of steels, particularly long products, and other alloys and shapes using fluidized-sand heat transfer media. The technology directs gas burners into U-tube assemblies suspended in the media. The fluidizing agent is hot exhaust gas recovered from the U-tubes. Blended exhaust gases and cool air can maintain fluidizing gas, plenum and retort temperatures at nearly the same temperature as the sand. Constant volume and pressure of fluidizing gas maximizes heat transfer between sand and product. For extreme heating applications, a thermally insulated cover held in direct contact with the hot fluidized sand improves energy efficiency. A sand return system returns sand lost from the bed exit to entrance. The modular air fluidized sand bed includes a fluidization pressure and volume that are altered independent of a fluidization media temperature.
    Type: Grant
    Filed: September 7, 2008
    Date of Patent: May 29, 2012
    Inventor: Thomas Wilson Tyl
  • Patent number: 8119059
    Abstract: An apparatus for manufacturing molten iron includes i) at least one fluidized-bed reduction reactor that converts iron ore into reduced materials by reducing and plasticizing the iron ore, ii) a melter-gasifier into which the reduced materials are charged and oxygen is injected such that the melter-gasifier manufactures molten iron, and iii) a reducing gas supply line that supplies a reducing gas discharged from the melter-gasifier into the fluidized-bed reduction reactor. The fluidized-bed reduction reactor includes a gas injector that injects a gas into the fluidized-bed reduction reactor to remove stagnating layers.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: February 21, 2012
    Assignees: POSCO, Siemens VAI Metals Technologies GmbH & Co.
    Inventors: Min-Young Cho, Hang-Goo Kim, Myoung-Kyun Shin, Nag-Joon Choi, Kung-Won Nam, Sun-Kwang Jeong, Jun-Hyuk Lee
  • Patent number: 8052921
    Abstract: An apparatus for manufacturing molten iron includes i) at least one fluidized-bed reduction reactor that reduces and plasticizes iron ore and converts the iron ore into reduced materials, ii) a melter-gasifier into which the reduced ore is charged and oxygen is injected, the melter-gasifier manufacturing molten iron, and iii) a reducing gas supply line that supplies a reducing gas discharged from the melter-gasifier to the fluidized-bed reduction reactor. The fluidized-bed reduction reactor includes a cyclone that is installed in the fluidized-bed reduction reactor to collect fine iron ore. A gas injector, which prevents the fine ore from adhering by injecting gas containing carbon, is connected to the cyclone.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: November 8, 2011
    Assignees: POSCO, Siemens VAI Metals Technologies GmbH & Co.
    Inventors: Myoung-Kyun Shin, Sang-Hyun Kim, Jun-Hyuk Lee, Kung-Won Nam
  • Patent number: 8025836
    Abstract: A plant for the heat treatment of solids containing iron oxide includes a fluidized bed reactor. The reactor includes at least one gas supply tube at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is located, and a mixing chamber being located above the upper orifice region of the at least one gas supply tube. The gas flowing through the at least one gas supply tube entrains solids from the stationary annular fluidized bed-into the mixing chamber when passing through the upper orifice region of the at least one gas supply tube.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: September 27, 2011
    Assignee: Outotec Oyi
    Inventors: Martin Hirsch, Michael Stroeder, Peter Weber
  • Patent number: 8021601
    Abstract: A plant for the heat treatment of solids containing titanium includes a fluidized bed reactor. The reactor includes at least one gas supply tube being at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is located, and a mixing chamber being located above the upper orifice region of the gas supply tube. The gas flowing through the gas supply tube entrains solids from the stationary annular fluidized bed into the mixing chamber when passing through the upper orifice region of the gas supply system. The plant further includes a solids separator downstream of the reactor. The solids separator includes a solids conduit leading to the annular fluidized bed of the reactor.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: September 20, 2011
    Assignee: Outotec Oyj
    Inventors: Dirk Nuber, Michael Stroeder, Werner Stockhausen, Lothar Formanek, Martin Hirsch, Ali-Naghi Beyzavi
  • Patent number: 8021600
    Abstract: A plant for the heat treatment of solids containing iron oxide. The plant includes a reactor including a fluidized bed reactor. The reactor includes a gas supply system disposed in the reactor, a stationary annular fluidized bed which at least partly surrounds the gas supply system, and a mixing chamber. The gas supply system is configured so that gas flowing through the gas supply system entrains solids from the stationary annular fluidized bed into the mixing chamber.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: September 20, 2011
    Assignee: Outotec Oyj
    Inventors: Andreas Orth, Martin Hirsch, Peter Weber, Stuart Sneyd, Dirk Nuber, Michael Stroeder
  • Patent number: 7878156
    Abstract: The present invention relates to a method for the conveyance of fine-grained solids in a fluidized bed reactor and also to a corresponding plant. It is proposed to introduce a first gas or gas mixture from below through a central tube (3) into a mixing chamber (7) of the reactor (1), the central tube (3) being at least partly surrounded by a stationary annular fluidized bed (10) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture as well as of the fluidizing gas for the annular fluidized bed (10) are adjusted such that the particle Froude numbers in the central tube (3) are between 1 and 100, in the annular fluidizied bed (10) between 0.02 and 2 in the mixing chamber (7) between 0.3 and 30.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: February 1, 2011
    Assignee: Outotec Oyj
    Inventors: Jochen Freytag, Martin Hirsch, Michael Ströder
  • Patent number: 7858019
    Abstract: The present invention relates to an apparatus for manufacturing molten iron. The present invention provides an apparatus for manufacturing molten iron including a charge container receiving the supply of reducing material in which hot fine direct reduced iron from multiple fluidized-bed reactors are mixed; at least one pair of roller presses to which the fine direct reduced iron is supplied to undergo roll pressing, thereby producing continuous compacted material having lumped portions adjacent to each other; a crusher crushing the compacted material produced by the roller presses; and a melter-gasifier to which is charged crushed compacted material that is crushed by the crusher. Each of the pair of roller presses include pressed portions and protruded lines formed between the pressed portions.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: December 28, 2010
    Assignee: Posco
    Inventors: Hoo-Geun Lee, Sung-Kee Shin, Tae-In Kang, Deuk-Chae Kim, Chang-Oh Kang, Kwang-Hee Lee, Sang-Hoon Joo, Sung-Gon Kim
  • Patent number: 7854608
    Abstract: The present invention relates to a method for the heat treatment of fine-grained solids, in particular gypsum, in which the solids are heated to a temperature of 50 to 1000° C. in a fluidized bed reactor (1), and to a corresponding plant. To improve the energy utilization, it is proposed to introduce a first gas or gas mixture from below through a preferably central gas supply tube (3) into a mixing chamber (21) of the reactor (1), the gas supply tube (3) being at least partly surrounded by a stationary annular fluidized bed (2) which is fluidized by supplying fluidizing gas, and to adjust the gas velocities of the first gas or gas mixture as well as of the fluidizing gas for the annular fluidized bed (2) such that the particle Froude numbers in the gas supply tube (3) are between 1 and 100, in the annular fluidized bed (2) between 0.02 and 2 and in the mixing chamber (21) between 0.3 and 30.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: December 21, 2010
    Assignee: Outotec Oyj
    Inventors: Dirk Nuber, Werner Stockhausen, Michael Ströder
  • Patent number: 7850902
    Abstract: A method for manufacturing molten iron that improves charging and discharge of the fine iron ore, and an apparatus for manufacturing molten iron using the same. The apparatus for manufacturing molten iron includes i) at least one fluidized-bed reduction reactor that reduces fine iron ore and converts the fine iron ore into reduced iron, ii) a fine iron ore charging bin that supplies the fine iron ore to the fluidized-bed reduction reactor, iii) a fine iron ore charging line that directly connects the fine iron ore charging bin to each of the fluidized-bed reduction reactors, and directly charges the fine iron ore into each of the fluidized-bed reduction reactor, iv) a melter-gasifier into which lumped carbonaceous materials and the reduced iron are charged and oxygen is injected, the melter-gasifier manufacturing molten iron, and v) a reducing gas supply line that supplies a reducing gas discharged from the melter-gasifier to the fluidized-bed reduction reactor.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: December 14, 2010
    Assignees: POSCO, Siemens VAI Metals Technologies GmbH & Co.
    Inventors: Sun-Kwang Jeong, Myoung-Kyun Shin, Min-Young Cho
  • Patent number: 7824603
    Abstract: An apparatus for reducing a metalliferous material in a fluidized bed includes a vessel for containing the fluidized bed, a mechanism for supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidizing gas into the vessel for forming the fluidized bed in the vessel. The oxygen-containing gas supply mechanism includes one or more than one oxygen-containing gas injection lance having a lance tip with an outlet that is positioned for injecting the oxygen-containing gas in a downward flow into the vessel within a range of plus or minus 40° to the vertical.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: November 2, 2010
    Assignee: Outotec Oyj
    Inventors: Andreas Orth, Heinz Eichberger, Donald Keith Philp, Jeantine Van Gemund, legal representative, Rod Dry
  • Patent number: 7687018
    Abstract: Means for conveying hot granular material from a loading zone to an arc melting furnace (3), comprising a horizontal trough (1), trough vibration generators that cause the granular material to move along the trough, a sluice gate (4) to regulate the material flow in the discharge zone and a sluice gate to regulate the material flow in correspondence with the loading zone. Separating baffles (5) are arranged inside the conveyor trough defining cells in which the granular material accumulates and considerably improving the effectiveness of the action of the gases that are forced through the granular bed, for instance to prevent oxidation of the hot DRI or to perform an additional reduction process.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: March 30, 2010
    Assignee: Danieli & C. Officine Meccanicite S.p.A.
    Inventors: Arbeno Vrech, Alfredo Poloni
  • Publication number: 20100044933
    Abstract: A plant for the heat treatment of solids containing iron oxide includes a fluidized bed reactor. The reactor includes at least one gas supply tube at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is located, and a mixing chamber being located above the upper orifice region of the at least one gas supply tube. The gas flowing through the at least one gas supply tube entrains solids from the stationary annular fluidized bed-into the mixing chamber when passing through the upper orifice region of the at least one gas supply tube.
    Type: Application
    Filed: November 2, 2009
    Publication date: February 25, 2010
    Applicant: OUTOTEC OYJ
    Inventors: Martin Hirsch, Michael Ströder, Peter Weber
  • Patent number: 7651547
    Abstract: The present invention relates to a method and a plant for the heat treatment of solids containing titanium and possibly further metal oxides, in which fine-grained solids are heated to a temperature of 700 to 950° C. in a fluidized bed reactor (1). To improve the energy utilization, it is proposed to introduce a first gas or gas mixture from below through a gas supply tube (3) into a mixing chamber (7) of the reactor (1), the gas supply tube (3) being at least partly surrounded by a stationary annular fluidized bed (10) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture as well as of the fluidizing gas for the annular fluidized bed (10) are adjusted such that the particle Froude numbers in the gas supply tube (3) are between 1 and 100, in the annular fluidized bed (10) between 0.02 and 2 and in the mixing chamber (7) between 0.3 and 30.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: January 26, 2010
    Assignee: Outotec Oyj
    Inventors: Dirk Nuber, Michael Ströder, Werner Stockhausen, Ali-Naghi Beyzavi, Lothar Formanek, Martin Hirsch
  • Publication number: 20090308204
    Abstract: Disclosed is a method for reducing metalliferous material to a reduction product. Also disclosed is an apparatus for reducing metalliferous material to a reduction product.
    Type: Application
    Filed: July 18, 2007
    Publication date: December 17, 2009
    Applicant: CORUS TECHNOLOGY BV
    Inventor: Christiaan Johannes Kooij
  • Patent number: 7632334
    Abstract: A method for the heat treatment of solids containing iron oxide, in which fine-grained solids are heated to a temperature of about 630° C. in a fluidized-bed reactor (1). To improve the utilization of energy, it is proposed to introduce a first gas or gas mixture from below through a supply tube (3) into a mixing chamber (7) of the reactor (1), the gas supply tube (3) being at least partly surrounded by a stationary annular fluidized bed (10) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture and of the fluidizing gas for the annular fluidized bet (10) are adjusted such that the Particle-Froude-Numbers in the gas supply tube (3) are between 1 and 100, in the annular fluidized bed (10) between 0.02 and 2, and in the mixing chamber (7) between 0.3 and 30.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: December 15, 2009
    Assignee: Outotec OYJ
    Inventors: Martin Hirsch, Michael Ströder, Peter Weber
  • Patent number: 7625422
    Abstract: The present invention relates to a method and a plant for the heat treatment of solids containing iron oxide, in which fine-grained solids are heated to a temperature of 700 to 1150° C. in a fluidized bed reactor (8). To improve the utilization of energy, it is proposed to introduce a first gas or gas mixture from below through at least one gas supply tube (9) into a mixing chamber region (15) of the reactor (8), the gas supply tube (9) being at least partly surrounded by a stationary annular fluidized bed (12) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture and of the fluidizing gas for the annular fluidized bed (12) are adjusted such that the Particle-Froude-Numbers in the gas supply tube (9) are between 1 and 100, in the annular fluidized bed (12) between 0.02 and 2, and in the mixing chamber (15) between 0.3 and 30.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: December 1, 2009
    Assignee: Outotec Oyj
    Inventors: Andreas Orth, Martin Hirsch, Peter Weber, Stuart Sneyd, Dirk Nuber, Michael Ströder
  • Patent number: 7608128
    Abstract: A direct reduction process for a metalliferous material includes supplying a solid carbonaceous material and an oxygen-containing gas into a fluidized bed in a first vessel and generating heat by reactions between the oxygen-containing gas and the solid carbonaceous material and any other oxidizable solids and gases in the fluidized bed and discharging a hot off-gas stream containing entrained solids. The process also includes supplying the metalliferous material to a fluidized bed in a second vessel and supplying the hot off-gas stream containing entrained solids from the first vessel to the fluidized bed in the second vessel and partially reducing the metalliferous feed material in the solid state in the fluidized bed and discharging a product stream of partially reduced metalliferous material and an off-gas stream containing entrained solids.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: October 27, 2009
    Assignee: Outotec Oyj
    Inventors: Andreas Orth, Heinz Eichberger, Donald Keith Philp, Jeantine Van Gemund, legal representative, Rod Dry
  • Publication number: 20090008841
    Abstract: An apparatus for manufacturing molten iron includes i) at least one fluidized-bed reduction reactor that converts iron ore into reduced materials by reducing and plasticizing the iron ore, ii) a melter-gasifier into which the reduced materials are charged and oxygen is injected such that the melter-gasifier manufactures molten iron, and iii) a reducing gas supply line that supplies a reducing gas discharged from the melter-gasifier into the fluidized-bed reduction reactor. The fluidized-bed reduction reactor includes a gas injector that injects a gas into the fluidized-bed reduction reactor to remove stagnating layers.
    Type: Application
    Filed: December 26, 2006
    Publication date: January 8, 2009
    Applicants: POSCO, VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH & CO.
    Inventors: Min-Young Cho, Hang-Goo Kim, Myoung-Kyun Shin, Nag-Joon Choi, Kung-Won Nam, Sun-Kwang Jeong, Jun-Hyuk Lee
  • Patent number: 7470310
    Abstract: Apparatus and process for producing a fixed bed in a metallurgical unit, preferably for producing pig iron or primary steel products from iron-containing charge materials, in particular in a melted gasifier, in which a lumpy bulk material, which contains ore-containing and carbon-containing constituents, prereduced iron ore, preferably sponge iron, and preferably lumpy, coal, is charged onto a surface. Through mixing of the ore-containing constituent with the carbon-containing constituent of the bulk material takes place. The entire ore-containing constituent is charged onto an active circumferential or peripheral region of the fixed bed, at which the thorough, preferably uniform mixing of the ore-containing constituent with the carbon-containing constituent of the bulk material takes place preferably outward of the center. A device scatters the stream of bulk material aver the surface and less of the material is scattered at the center, so that heavier grain lumps segregate themselves toward the center.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: December 30, 2008
    Assignee: Voest-Alpine Industrieanlagenbau GmbH & Co.
    Inventors: Rainer Walter Kastner, Reinhard Pum, Kurt Wieder, Johann Wurm, Hado Heckmann
  • Publication number: 20080302212
    Abstract: A method for manufacturing molten iron that improves charging and discharge of the fine iron ore, and an apparatus for manufacturing molten iron using the same. The apparatus for manufacturing molten iron includes i) at least one fluidized-bed reduction reactor that reduces fine iron ore and converts the fine iron ore into reduced iron, ii) a fine iron ore charging bin that supplies the fine iron ore to the fluidized-bed reduction reactor, iii) a fine iron ore charging line that directly connects the fine iron ore charging bin to each of the fluidized-bed reduction reactors, and directly charges the fine iron ore into each of the fluidized-bed reduction reactor, iv) a melter-gasifier into which lumped carbonaceous materials and the reduced iron are charged and oxygen is injected, the melter-gasifier manufacturing molten iron, and v) a reducing gas supply line that supplies a reducing gas discharged from the melter-gasifier to the fluidized-bed reduction reactor.
    Type: Application
    Filed: December 26, 2006
    Publication date: December 11, 2008
    Applicants: POSCO, VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH & CO
    Inventors: Sun-Kwang Jeong, Myoung-Kyun Shin, Min-Young Cho
  • Publication number: 20080277842
    Abstract: An apparatus for manufacturing molten iron includes i) at least one fluidized-bed reduction reactor that reduces and plasticizes iron ore and converts the iron ore into reduced materials, ii) a melter-gasifier into which the reduced ore is charged and oxygen is injected, the melter-gasifier manufacturing molten iron, and iii) a reducing gas supply line that supplies a reducing gas discharged from the melter-gasifier to the fluidized-bed reduction reactor. The fluidized-bed reduction reactor includes a cyclone that is installed in the fluidized-bed reduction reactor to collect fine iron ore. A gas injector, which prevents the fine ore from adhering by injecting gas containing carbon, is connected to the cyclone.
    Type: Application
    Filed: December 26, 2006
    Publication date: November 13, 2008
    Applicants: POSCO, VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH & CO
    Inventors: Myoung-Kyun Shin, Sang-Hyun Kim, Jun-Hyuk Lee, Kung-Won Nam
  • Publication number: 20080210055
    Abstract: An apparatus for reducing a metalliferous material in a fluidized bed includes a vessel for containing the fluidized bed, a mechanism for supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidizing gas into the vessel for forming the fluidized bed in the vessel. The oxygen-containing gas supply mechanism includes one or more than one oxygen-containing gas injection lance having a lance tip with an outlet that is positioned for injecting the oxygen-containing gas in a downward flow into the vessel within a range of plus or minus 40° to the vertical.
    Type: Application
    Filed: May 20, 2005
    Publication date: September 4, 2008
    Applicant: OUTOKUMPU TECHNOLOGY OYJ
    Inventors: Andreas Orth, Heinz Eichberger, Donald Keith Philp, Rod Dry, Jeantine Van Gemund
  • Patent number: 7264765
    Abstract: This invention relates to a method and an apparatus for smelting titanium metal by the thermal reduction of titanium oxide (TiO2) to titanium metal (Ti); a mixed salt of calcium chloride (CaCl2) and calcium oxide (CaO) contained in a reaction vessel is heated to form a molten salt which constitutes a reaction region, the molten salt in the reaction region is electrolyzed thereby converting the molten salt into a strongly reducing molten salt containing monovalent calcium ions (Ca+) and/or calcium (Ca), titanium oxide is supplied to the strongly reducing molten salt and the titanium oxide is reduced and the resulting titanium metal is deoxidized by the monovalent calcium ions and/or calcium. The method and the apparatus make it feasible to produce commercially titanium metal suitable for a variety of applications from titanium oxide.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: September 4, 2007
    Assignee: Nippon Light Metal Company, Ltd.
    Inventors: Katsutoshi Ono, Ryosuke Suzuki
  • Patent number: 7025927
    Abstract: A heat-treatment apparatus including a first furnace for heat treatment and solution treatment of a work piece, and a second furnace for heat treatment and aging treatment of a work piece, wherein each furnace includes a dispersion tube cantilevered and immersed within a fluidized bed, the tube for blowing hot air into the fluidized bed. The first furnace includes a heat exchanger for recovering waste heat from gases discharged the first furnace for use as a heat source for the second furnace.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: April 11, 2006
    Assignee: Asahi Tec Corporation
    Inventor: Takayuki Sakai
  • Patent number: 6953547
    Abstract: The invention relates to an apparatus for feeding finely divided solids, containing at least sulphidic metal concentrate, and oxygenous oxidizing gas into a suspension smelting furnace, said apparatus comprising elements for conducting solids and oxidizing gas into the suspension smelting furnace. According to the invention, in the feed orifice (7) of the suspension smelting furnace through which solids (2) and oxidizing gas (3) are fed into the reaction chamber (1) of the suspension smelting furnace, there is installed a suspension creation chamber (5,11) for a suspension containing solids (2) and oxidizing gas (3), in which chamber the solids (2) and at least part of the oxidizing gas (3) can be mixed to form a suspension before they flow into the reaction chamber (1) of the suspension smelting furnace.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: October 11, 2005
    Assignee: Outokumpu Technology Oy
    Inventor: Risto Saarinen
  • Patent number: 6916357
    Abstract: Granular ore or ore concentrate is charged into a furnace for calcining the ore at temperatures of 400 to 1050° C., the ore forming a stationary fluidized bed in the furnace. The ore is thrown onto the fluidized bed through an opening in the furnace housing disposed above the fluidized bed, the ore being accelerated by blades of a rotating impeller. The impeller is disposed outside the furnace in the vicinity of the opening of the housing. Preferably, the rotational speed of the impeller is variable, and the impeller is movable and/or pivotable with respect to the furnace.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: July 12, 2005
    Inventors: Michael Ströder, Horst Zingrebe, Hubert Vollmer
  • Patent number: 6878183
    Abstract: This invention relates to a method for sublimation refining which gives a high-purity product in high yield while preventing corrosion of the apparatus, contamination of the product and change in quality of the product and to an apparatus useful for the method. The apparatus of this invention for sublimation refining comprises a heat generating unit made of a material generating heat by electromagnetic induction, sublimating unit A and collecting units B and C, respectively independently controllable in temperature by electromagnetic induction heating and the inner surface or the inner tube of the sublimating or collecting unit is made of a material like metal and ceramic inert to sublimable substances.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: April 12, 2005
    Assignees: Nippon Steel Chemical Co., Ltd., Osaka Yuka Industries Co., Ltd.
    Inventors: Mahito Soeda, Shuhei Hotta, Kazuo Ishii
  • Publication number: 20040256771
    Abstract: The invention relates to an arrangement (1, 12, 16) for continuously tapping a molten phase, such as matte, from a smelting furncae, such as a flash smelting furnace, said arrangement comprising a matte tapping hole (5) provided in the furnace wall for discharging the molten phase from the furnace, an overflow tank (6) for receiving the molten phase (4), and an overflow edge (8) provided in the overflow tank for discharging the molten phase, so that in the smelting furnace, in the vicinity of the matte tapping hole (5), there can be arranged at least one heat-producing element (9, 15) in order to prevent the molten phase from being solidified.
    Type: Application
    Filed: April 26, 2004
    Publication date: December 23, 2004
    Inventor: Risto Saarinen
  • Patent number: 6811743
    Abstract: A method for supplying a granular raw material for reduced iron in which when the granular raw material is fed into a hopper and from there supplied onto a hearth of a movable hearth furnace through a material supplying device, the material supplying device is moved vertically to thereby adjust the gap between the lower end of the material supplying device and the hearth. Thus, the amount of granular raw material supplied onto the hearth of the movable hearth furnace is adjustable. Further, granular raw material is dispersed in the hearth width direction over the entire surface of the hearth of the movable hearth furnace with minimal breakage or pulverization of the granular raw material for reduced iron and leveled by a spiral vane rotated on the downstream side, with respect to a hearth moving direction, of a material discharge outlet of the material supplying device.
    Type: Grant
    Filed: November 4, 2002
    Date of Patent: November 2, 2004
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventor: Takao Harada
  • Patent number: 6736876
    Abstract: A fluidized bed reduction reactor (100) for supplying a reduced iron to a melter-gasifier (1) of a smelting reduction system includes an exhaust gas supply unit (3) for supplying an exhaust gas to a reduction gas supply tube (4) interconnecting the melter-gasifier (1) and fluidized bed reduction furnaces (20, 30, 40) when the pressure of the reduction gas in each fluidized bed reduction furnace radically decreases with the occurrence of pressure peak in the melter-gasifier (1). The fluidized bed reduction reactors further include iron ore flow blockage prevention units for directly bypassing some of the reduction gas from each iron ore discharge tube (33, 43) disposed between the neighboring furnaces to the scrubber (50) when the inner pressure of the melter-gasifier (1) radically increases with the occurrence of pressure peak, and a backup gas supply unit supplying a backup nitrogen gas to the bottom of each fluidized bed reduction furnace when a nozzle of a distribution plate (24, 34, 44) is clogged.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: May 18, 2004
    Assignee: Research Institute of Industrial Science & Technology
    Inventors: Myoung-Kyun Shin, Jun-Hyuk Lee, Sun-Kwang Jeong, Nag-Joon Choi, Hang-Goo Kim, Heung-Won Kang
  • Patent number: 6669894
    Abstract: Disclosed is a fluidized bed roaster with stabilized fluidized bed for roasting zinc concentrate which can have a uniform internal temperature distribution to form a stabilized fluidized bed, thereby dramatically reducing the amount of sulfide sulfur contained in calcine and the amount of fine calcine particle carried over to a gas discharge port.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: December 30, 2003
    Assignee: Korea Zinc Co., Ltd.
    Inventors: Chang-Young Choi, Young-Gae Chun
  • Patent number: 6645269
    Abstract: In a process for producing a metal melt by reducing metal-oxide-containing material in a fluidized-bed reactor by the fluidized-bed method and by subsequently melting down the reduced material in a melt-down gasifier, in the melt-down gasifier there is generated from carbon-containing material a reducing gas which is used for reducing the metal-oxide containing material by the fluidized-bed method. Both the reducing and the melting-down are effected under atmospheric excess pressure. For the purposes of transferring the reduced material from the fluidized-bed reactor into the melt-down gasifier in a simple manner, a lower pressure is set in an intermediate vessel situated above the melt-down gasifier than in fluidized-bed reactor, and the reduced material is allowed to flow, under relaxation, upwards from the fluidized-bed reactor into the intermediate vessel and conducted from the intermediate vessel via a sluice system into the melt-down gasifier while being pressurized.
    Type: Grant
    Filed: October 21, 2002
    Date of Patent: November 11, 2003
    Assignees: Voest-Alpine Industrieanlagenbau GmbH, Pohang Iron & Steel Co., Ltd., Research Institute of Industrial Science & Technology, Incorporated Foundation
    Inventor: Johann Zirngast
  • Patent number: 6626977
    Abstract: A direct smelting process for producing iron and/or ferroalloys is provided, which involves injecting feed materials into a molten bath of molten metal in a metallurgical vessel to form an expanded molten bath zone, and injecting oxygen containing gas, wherein the selection of the number of, and position of, the solids injection and oxygen gas injection lances is such that the expanded molten bath zone includes a raised region around the oxygen gas injection region, and such that splashes, droplets and streams of molten material project upwardly from the raised region, and such that a free space forms around a lower end of the oxygen gas injection lance.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: September 30, 2003
    Assignee: Technological Resources Pty Ltd.
    Inventor: Rod Dry
  • Publication number: 20030173007
    Abstract: This invention provides a fluidized-bed furnace, in which the work piece is heat-treated in a fluidized bed formed by filling a vessel with particles and blowing hot air into the vessel to fluidize the particles. It includes a cantilevered dispersion tube disposed in the fluidized bed, and provided with air outlets directed downward, from which the hot air is blown out. This invention also provides a heat-treatment apparatus incorporating a rotary heat-treatment furnace, in which a work piece is heat-treated while being rotated in the fluidized bed, as the solution and/or aging treatment furnaces; removing dust from the exhaust gases discharged from the solution treatment furnace by a dust collector, and recovering the waste heat from the exhaust gases by an heat exchanger as the heat source for the aging treatment furnace; and also incorporating an automatic carrier which charges or discharges the work piece into or out of each furnace.
    Type: Application
    Filed: February 10, 2003
    Publication date: September 18, 2003
    Inventor: Takayuki Sakai
  • Publication number: 20030159541
    Abstract: In a process for the gas reduction of particulate oxide-containing ores, in particular iron-oxide-containing material, in the fluidized-bed process at a pressure of <5 bars, wherein the ore by aid of a reducing gas produced from coal is heated, optionally also pre-reduced, in a fluidized-bed reactor (1) designed as a pre-heating stage (5), subsequently is reduced to sponge iron in at least one fluidized-bed reactor (2, 3) designed as a reduction stage (7, 8), the reducing gas via a reducing-gas feed duct (12) or reducing-gas duct (13) being conducted from the reduction stage (7, 8) to the pre-heating stage (5) in the opposite direction of the material to be reduced and conducted from stage to stage, and being drawn off as an export gas after purification, heat is supplied to the reducing gas fed to the reduction stage (7, 8) and/or pre-heating stage (5), namely by combustion, together with oxygen and/or air, of a portion of the reducing gas provided for the gas reduction in the reduction stage (7, 8) and/o
    Type: Application
    Filed: March 4, 2003
    Publication date: August 28, 2003
    Inventors: Leopold Werner Kepplinger, Franz Hauzenberger, Johannes Schenk, Sanghoon Joo
  • Publication number: 20030122289
    Abstract: Disclosed is a fluidized bed roaster with stabilized fluidized bed for roasting zinc concentrate which can have a uniform internal temperature distribution to form a stabilized fluidized bed, thereby dramatically reducing the amount of sulfide sulfur contained in calcine and the amount of fine calcine particle carried over to a gas discharge port. The fluidized bed roaster includes an upper cylindrical section closed at an upper end thereof by a top circular roof fixedly mounted to the upper end, the upper cylindrical section having a volume corresponding to 3.8 to 4.8 times the volume of a lower cylindrical section, an intermediate tapered section fixedly coupled, at an upper end thereof, to a lower end of the upper cylindrical section, the intermediate tapered section having a structure downwardly tapered at a repose angle of 22 to 25° while having a volume corresponding to 1.7 to 2.
    Type: Application
    Filed: January 18, 2002
    Publication date: July 3, 2003
    Inventors: Chang-Young Choi, Young-Gae Chun
  • Patent number: 6585798
    Abstract: A smelting reduction apparatus which separates exhaust gas, which is exhausted from a melter-gasifier or a fluidized bed reactor, into dusts and reducing gas to supply them to each fluidized bed reactor respectively is disclosed, in which the smelting reduction apparatus includes a three-stage type fluidized bed reactor, a melter-gasifier for manufacturing molten pig iron by finally reducing the fine iron ores of which reaction is finished in a final fluidized bed reactor, and a dust separating device, which performs separation of exhausted gas from the melter-gasifier into dusts and reducing gas, so as to supply the separated reducing gas to a lower part of the final fluidized bed reactor, dusts having a larger particle sizes in the separated dusts to the melter-gasifier again, and fine dusts having a smaller particle sizes in the separated dusts to an upper part of a gas distributor of the final fluidized bed reactor.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: July 1, 2003
    Assignees: Pohang Iron & Steel Co., Ltd., Research Institute of Industrial Science & Technology
    Inventors: Nag-Joon Choi, Sun-Kwang Jeong, Hang-Goo Kim, Heung-Won Kang, Hauzenberger Franz
  • Patent number: 6569377
    Abstract: In a process for the direct reduction of particulate iron-oxide-containing material by fluidization, a synthesis gas is introduced as a reducing gas into several fluidized bed zones consecutively arranged in series. The reducing gas is conducted from one fluidized bed zone to another fluidized bed zone in counterflow to a flow of particulate iron-oxide containing material through the fluidized bed zones. In order to reduce operating costs and, in particular, the energy demand, various process parameters are varied according to the temperature of the iron-oxide-containing material in the first fluidized bed zone being adjusted to be below 400° C. (and, preferably, below 350° C.), above 580° C. (and preferably about 650° C.), or to a temperature within the range of from 400° C. to 580° C. If the temperature of the iron-oxide-containing material in the first fluidized bed zone is maintained to be below 400° C.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: May 27, 2003
    Assignee: Voest-Alpine Industrieanlagenbau GmbH
    Inventors: Siegfried Zeller, Konstantin Milionis, Johann Reidetschläger, Leopold Werner Kepplinger, Johann Zirngast, Johannes Schenk, Roy Hubert Whipp, Jr.
  • Publication number: 20030089200
    Abstract: There is provided a method of producing reduced iron compacts with high crushing strength, low powderization and a high reduction rate in a solid reduction-type firing reducing furnace such as a rotary hearth-type reducing furnace, as well as reduced iron compacts obtained by the method and a method of melt-reducing the reduced iron compacts in a blast furnace.
    Type: Application
    Filed: September 13, 2002
    Publication date: May 15, 2003
    Inventors: Tetsuharu Ibaraki, Syouji Imura, Hiroshi Oda, Masaharu Takahashi, Yoichi Abe, Shigeki Takahashi, Satoshi Suzuki