Gaseous Treating Material Patents (Class 266/217)
  • Patent number: 10640846
    Abstract: Methods for degassing and for removing impurities from molten metals are disclosed. These methods can include operating an ultrasonic device in a molten metal bath, and adding a purging gas into the molten metal bath in close proximity to the ultrasonic device.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: May 5, 2020
    Assignee: Southwire Company, LLC
    Inventors: Victor F. Rundquist, Kevin S. Gill
  • Patent number: 9962764
    Abstract: An exemplary embodiment relates to a fireproof ceramic bottom in the connection region to at least one wall of a vessel for handling high-temperature melts.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: May 8, 2018
    Assignee: REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG
    Inventors: Alexander Maranitsch, Matthias Hoeck, Marcus Kirschen
  • Patent number: 9909808
    Abstract: A system for adding gas to and transferring molten metal from a vessel and into one or more of a ladle, ingot mold, launder, feed die cast machine or other structure is disclosed. The system includes at least a vessel for containing molten metal, an overflow (or dividing) wall, a device or structure, such as a molten metal pump, for generating a stream of molten metal, and one or more gas-release devices.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: March 6, 2018
    Assignee: Molten Metal Equipment Innovations, LLC
    Inventor: Paul V. Cooper
  • Patent number: 9895743
    Abstract: The invention relates to a method for casting a cast part according to the tilt pour casting principle, and the metal melt (1) is poured from at least one tiltable casting vessel (2) into a casting mold (3) having a mold cavity (4) that forms the cast part, and the at least one casting vessel (2) and the casting mold (3) are arranged next to each other in one step, and in a subsequent step the metal melt (1) is settled, and the at least one casting vessel (2) and the casting mold are positioned in such a way before pouring the metal melt (1) from the at least one casting vessel (2) into the casting mold (3) that a settled level (a) of the metal melt (1) in the at least one casting vessel (2) is at the same height as a section of an inner surface of the casting mold (3).
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: February 20, 2018
    Assignee: Fill Gesellschaft m.b.H.
    Inventor: Wolfgang Rathner
  • Patent number: 9840754
    Abstract: A rotary injector comprising an elongated shaft having a proximal end and a distal end, and an impeller at the distal end of the elongated shaft, the elongated shaft and the impeller being collectively rotatable during operation around an axis of the shaft, the rotary injector being hollow and having an internal supply conduit extending along the shaft and across the impeller, the supply conduit having an inlet at the proximal end of the shaft, a main portion extending from the inlet to a discharge portion, the discharge portion extending to an axial outlet, the discharge portion having a narrow end connecting the main portion of the supply conduit and a broader end at the axial outlet.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: December 12, 2017
    Assignee: Rio Tinto Alcan International Limited
    Inventors: Joseph Langlais, Peter Donald Waite, Francis Breton, Serge Munger
  • Patent number: 9617617
    Abstract: Methods for degassing and for removing impurities from molten metals are disclosed. These methods can include operating an ultrasonic device in a molten metal bath, and adding a purging gas into the molten metal bath in close proximity to the ultrasonic device.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: April 11, 2017
    Assignee: Southwire Company, LLC
    Inventors: Victor F. Rundquist, Kevin S. Gill
  • Patent number: 9506129
    Abstract: A device for dispersing gas into molten metal includes an impeller, a drive shaft having a gas-transfer passage therein, and a first end and a second end, and a drive source. The second end of the drive shaft is connected to the impeller and the first end is connected to the drive source. The impeller includes a first portion and a second portion with a plurality of cavities. The first portion covers the second portion to help prevent gas from escaping to the surface without entering the cavities and being mixed with molten metal as the impeller rotates. When gas is transferred through the gas-transfer passage, it exits through the gas-release opening(s) in the bottom of the impeller. At least some of the gas enters the cavities where it is mixed with the molten metal being displaced by the impeller. Also disclosed are impellers that can be used to practice the invention.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: November 29, 2016
    Assignee: Molten Metal Equipment Innovations, LLC
    Inventor: Paul V. Cooper
  • Patent number: 9506123
    Abstract: A refractory device, such as a replacement purge plug containing a refractory material, is configured to be inserted in the bottom of a ladle for introducing purging gas through a heat of molten metal in a ladle. One or more geometrical features on the lateral surface of the purge plug facilitate the installation of the purge plug into a housing block that has been subjected to erosion.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 29, 2016
    Assignee: VESUVIUS CRUCIBLE COMPANY
    Inventors: Paul Woods, Roy Phillips
  • Patent number: 9302321
    Abstract: The invention relates to a ceramic refractory stopper (a stopper device) for controlling a flow of molten metal at an outlet opening of a metallurgical vessel, such as a tundish.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: April 5, 2016
    Assignee: REFRACTORY INTELLECTUAL PROPERTY GmbH & Co.
    Inventors: Gerald Nitzl, Arno Stranimaier, Hans-Jurgen Haslinger, Helmut Kaufmann
  • Publication number: 20150135901
    Abstract: Ultrasonic probes containing a plurality of gas delivery channels are disclosed, as well as ultrasonic probes containing recessed areas near the tip of the probe. Ultrasonic devices containing these probes, and methods for molten metal degassing using these ultrasonic devices, also are disclosed.
    Type: Application
    Filed: November 17, 2014
    Publication date: May 21, 2015
    Inventor: Victor F. Rundquist
  • Patent number: 9034244
    Abstract: The present invention includes a molten metal pump and associated components that enable gas to be released into a stream of molten metal. The gas may be released into the molten metal stream (preferably into the bottom of the stream) flowing through a passage. Such a stream may be within the pump discharge and/or within a metal-transfer conduit extending from the pump discharge. The gas is released by using a gas-transfer foot that is positioned next to and is preferably attachable to the pump base or to the metal-transfer conduit. Preferably, the conduit (and/or discharge) in which the gas is released comprises two sections: a first section having a first cross-sectional area and a second section downstream of the first section and having a second cross-sectional area, wherein the second cross sectional area is larger than the first cross-sectional area. Preferably, the gas is released into or near the second section so that the gas is released into an area of relatively lower pressure.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: May 19, 2015
    Inventor: Paul V. Cooper
  • Publication number: 20150115510
    Abstract: A refractory device, such as a replacement purge plug containing a refractory material, is configured to be inserted in the bottom of a ladle for introducing purging gas through a heat of molten metal in a ladle. One or more geometrical features on the lateral surface of the purge plug facilitate the installation of the purge plug into a housing block that has been subjected to erosion.
    Type: Application
    Filed: March 15, 2013
    Publication date: April 30, 2015
    Applicant: VESUVIUS CRUCIBLE COMPANY
    Inventors: Paul Woods, Roy Phillips
  • Publication number: 20150091224
    Abstract: A raw material supply apparatus that supplies a raw material into a flash smelting furnace and supplies a first gas contributing to a reaction of the raw material into the flash smelting furnace, includes: a raw material passage that is provided out of a lance through which the first gas passes, the raw material passing through the raw material passage; and an adjuster that adjusts a distribution of the raw material by blowing a second gas to the raw material passing through the raw material passage.
    Type: Application
    Filed: September 30, 2014
    Publication date: April 2, 2015
    Applicant: PAN PACIFIC COPPER CO., LTD.
    Inventors: Tatsuya MOTOMURA, Eiji TOJIMA, Tomoya KAWASAKI, Yutaka YASUDA
  • Publication number: 20150061201
    Abstract: A burner is provided for a pulverous feed material. The burner has a structure that integrates the burner with a reaction vessel, and has an opening that communicates with the interior of the reaction vessel. The burner also has a gas supply channel to supply reaction gas through the opening into the reaction vessel, and a feed supply for delivering pulverous material to the reaction vessel. The burner also has a fluidic control system having at least one port capable of directing a stream of fluid at an angle to the direction of flow of the reaction gas so as to modify the flow of the reaction gas. In addition, components are provided to modify the swirl intensity and turbulence intensity of the reaction gas independently of the exit velocity.
    Type: Application
    Filed: April 5, 2013
    Publication date: March 5, 2015
    Applicant: Hatch Ltd.
    Inventors: Maciej Jastrzebski, Alan Mallory, Javier Eduardo Larrondo Piña, Thomas W. Gonzales, Alexandre Lamoureux, Ivan Marincic
  • Publication number: 20150040722
    Abstract: An iron production furnace equipment (1) has a melting reactor (2) into which iron oxide-containing raw material (4) and slag formers (5) are added. A melter arrangement (22) melts the iron oxide-containing raw material and transforms the melted raw material into liquid slag (6) A smelting reduction reactor (3) is connected to the melting reactor by a slag transfer arrangement (10). The smelting reduction reactor comprises a heater arrangement (30) for heating the slag. Means (32) for supplying a reductant (7) for reducing the iron oxide in the slag into a liquid iron melt (8) and for producing a combustible gas mixture (11) comprising at least one of CO and H2. A gas connection (12) is connected between the smelting reduction reactor and the melter arrangement. The melter arrangement in turn comprises a combuster (28) combusting the gas mixture. The combustion heat is used for purpose of melting.
    Type: Application
    Filed: February 7, 2013
    Publication date: February 12, 2015
    Inventors: Sven Santén, Matej Imris
  • Patent number: 8870999
    Abstract: A ladle that can melt and freeze castable metal in a specific manner so that high quality liquid metal and metal alloys may be produced with minimum oxide and hydrogen content. Upon introduction of a quantity of molten metal into the ladle, staged heating and cooling of the molten metal promotes the liberation of previously-dissolved gases from the castable metal, resulting in significant decreases in as-cast porosity.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: October 28, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Qigui Wang, Hengcheng Liao, Lei Zhao, Ye Pan
  • Publication number: 20140300036
    Abstract: A device for blowing gas into a metallurgical vessel contains at least one gas flow channel fluidly connecting a gas inlet located at one end to a gas outlet located at the opposite end. The channel is in the shape of a slit. The gas channel contains a series of continuous concave bridges connecting the opposing surfaces defining the channel, with their concave side oriented towards the gas outlet. The concave bridges are disposed in a staggered arrangement, such that any shortest line running from the gas outlet to the gas inlet of the channel necessarily intercepts the concave side of at least one bridge. The device is resistant to clogging by infiltrated molten metal or slag.
    Type: Application
    Filed: November 2, 2012
    Publication date: October 9, 2014
    Applicant: VESUVIUS CRUCIBLE COMPANY
    Inventor: Hans Rothfuss
  • Publication number: 20140252701
    Abstract: A system for adding gas to and transferring molten metal from a vessel and into one or more of a ladle, ingot mold, launder, feed die cast machine or other structure is disclosed. The system includes at least a vessel for containing molten metal, an overflow (or dividing) wall, a device or structure, such as a molten metal pump, for generating a stream of molten metal, and one or more gas-release devices.
    Type: Application
    Filed: May 23, 2014
    Publication date: September 11, 2014
    Inventor: Paul V. Cooper
  • Patent number: 8828310
    Abstract: A stopper rod having an elongate trunk with an upstream first end and a downstream second end, a continuous axial bore extending through the trunk from a stopper inlet in the upstream first end to a stopper outlet in the downstream second end, and a flow control device disposed within the bore to create a backpressure upstream thereof. The flow control device includes a body having an inlet, an outlet and a passageway therebetween, a wire positioned substantially axially in the passageway, and a retainer for maintaining the wire in the passageway. In one embodiment, the retainer is constituted by a portion of the wire itself, which is bent or crimped or configured as a loop; kink or spiral which prevents the wire from being dislodged from the passageway.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: September 9, 2014
    Assignee: Refractory Intellectual Property GmbH & Co KG
    Inventors: Gerald Nitzi, Tim Hedley, Joseph McGuire, John Stevenson
  • Publication number: 20140239560
    Abstract: The invention relates to a method for controlling suspension (8) in a suspension smelting furnace (1), to a suspension smelting furnace, and to a concentrate burner (2). The method comprises feeding additionally to pulverous solid matter (6) and additionally to reaction gas (7) reducing agent (13) into the suspension smelting furnace (1), wherein reducing agent (13) is fed in the form of a concentrated stream of reducing agent (13) through the suspension (8) in the reaction shaft (2) onto the surface (9) of the melt (10) to form a reducing zone (15) containing reducing agent (13) within the collection zone (14) of the melt (10).
    Type: Application
    Filed: November 29, 2011
    Publication date: August 28, 2014
    Applicant: OUTOTEC OYJ
    Inventors: Markku Lahtinen, Lauri P. Pesonen, Tapio Ahokainen, Peter Bjorklund
  • Patent number: 8790570
    Abstract: A movable device for injecting oxygen and other technical materials into an electric arc furnace includes a housing situated above a portion of a step of a crucible and equipped with a cooling coil, an injection lance of oxygen and other technical materials, a supporting and moving system of the lance between minimum and maximum range points of the liquid bath level contained therein, positioned in the housing, an opening situated in the housing and facing the inside of the crucible in which the lance is transferably guided, and a scraping member disposed between the opening and the lance.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: July 29, 2014
    Assignee: Tenova S.p.A.
    Inventors: Sivio Maria Reali, Giancarlo Cavallini, Mauro Grioni
  • Patent number: 8765051
    Abstract: An installation for producing stainless steel for all stainless steel products both in the austenitic and the ferritic range, based on liquid pig-iron and FeCr solids, without using a supply of electrical energy. The liquid pig-iron, after being pre-treated in a blast furnace, is subjected to a DDD treatment (dephosphorisation, desiliconisation and desulphuration), is heated, finished or alloyed and deoxidated. The quantity of slag-free liquid pig-iron that has been pre-treated in the blast furnace is separated and introduced into two classic “twin” AOD-L converters, where the required chemical process steps (of the DDD treatment and of the heating, decarburization and alloying stages) take place in parallel contrary processes using autogenous chemical energy, the DDD treatment being carried out first in the first twin AOD-L converter and the decarburization being carried out first in the second twin AOD-L converter.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: July 1, 2014
    Assignee: SMS Siemag Aktiengesellschaft
    Inventor: Johann Reichel
  • Patent number: 8758672
    Abstract: Nozzle for guiding molten metal, including an inlet at an upstream first end, at least one outlet towards a downstream second end, and an inner surface between the inlet and the outlet defining a bore through the nozzle having a throat region adjacent the inlet. An annular channel is provided in the inner surface of the nozzle, and a fluid supply is arranged to introduce fluid into the bore via the annular channel or downstream thereof. The throat region has a convexly curved surface and the annular channel is located within or adjacent the convexly curved surface of the throat region.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: June 24, 2014
    Assignee: Refractory Intellectual Property GmbH & Co KG
    Inventors: Gerald Nitzl, John Davies
  • Patent number: 8753563
    Abstract: A system for adding gas to and transferring molten metal from a vessel and into one or more of a ladle, ingot mold, launder, feed die cast machine or other structure is disclosed. The system includes at least a vessel for containing molten metal, an overflow (or dividing) wall, a device or structure, such as a molten metal pump, for generating a stream of molten metal, and one or more gas-release devices.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: June 17, 2014
    Inventor: Paul V. Cooper
  • Patent number: 8652397
    Abstract: Ultrasonic devices having an integrated gas delivery system are described, and these devices can be used to remove dissolved gasses and impurities from molten metals.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: February 18, 2014
    Assignee: Southwire Company
    Inventors: Victor F. Rundquist, Kevin S. Gill
  • Publication number: 20140042677
    Abstract: A process for producing pig iron or liquid primary steel products in a smelting unit (1), in particular a melter gasifier. Iron-ore-containing charge materials, and possibly additions, are at least partially reduced in at least one reduction unit (R1, R2, R3, R4) by means of a reducing gas. A first fraction of the at least partially reduced charge materials is melted down in the smelting unit (1), while carbon carriers and oxygen-containing gas are supplied, with the simultaneous formation of the reducing gas. The reducing gas is fed to the reduction unit (R1, R2, R3, R4) and, after the reducing gas has passed through the reduction unit, it is drawn off as top gas. A second fraction of the at least partially reduced charge materials is fed to a smelting reduction unit for reducing and smelting.
    Type: Application
    Filed: September 25, 2013
    Publication date: February 13, 2014
    Applicant: SIEMENS VAI METALS TECHNOLOGIES GMBH
    Inventors: Christian BOEHM, Jan-Friedemann PLAUL, Johannes Leopold SCHENK
  • Publication number: 20140008849
    Abstract: A device for dispersing gas into molten metal includes an impeller, a drive shaft having a gas-transfer passage therein, and a first end and a second end, and a drive source. The second end of the drive shaft is connected to the impeller and the first end is connected to the drive source. The impeller includes a first portion and a second portion with a plurality of cavities. The first portion covers the second portion to help prevent gas from escaping to the surface without entering the cavities and being mixed with molten metal as the impeller rotates. When gas is transferred through the gas-transfer passage, it exits through the gas-release opening(s) in the bottom of the impeller. At least some of the gas enters the cavities where it is mixed with the molten metal being displaced by the impeller. Also disclosed are impellers that can be used to practice the invention.
    Type: Application
    Filed: September 15, 2013
    Publication date: January 9, 2014
    Inventor: Paul V. Cooper
  • Publication number: 20130306205
    Abstract: A method for gas atomization of oxygen-reactive reactive metals and alloys wherein the atomized particles are exposed as they solidify and cool in a very short time to multiple gaseous reactive agents for the in-situ formation of a protective reaction film on the atomized particles. The present invention is especially useful for making highly pyrophoric reactive metal or alloy atomized powders, such as atomized magnesium and magnesium alloy powders. The gaseous reactive species (agents) are introduced into the atomization spray chamber at locations downstream of a gas atomizing nozzle as determined by the desired powder or particle temperature for the reactions and the desired thickness of the reaction film.
    Type: Application
    Filed: April 10, 2013
    Publication date: November 21, 2013
    Inventors: Iver E. Anderson, Andrew D. Steinmetz, David J. Byrd
  • Patent number: 8568654
    Abstract: Systems and corresponding methods are described herein that provide an effective inert blanket over a metal surface (hot solid (charge) metal or molten metal) in a container such as an induction furnace. The system includes a container of metal and a system configured to delivery biphasic inert cryogen toward the metal. The delivery system may include a lance disposed at the top of the container. The lance has a hood that directs both a flow of liquid cryogen and a flow of vaporous gas toward the metal surface. The liquid cryogen contacts the metal surface, generating a volume of expanding gas over the metal surface. The vaporous cryogen creates a reinforcing vapor that slows the expansion rate of the expanding gas, localizing the expanding gas over the metal surface.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: October 29, 2013
    Assignee: Air Liquide Industrial U.S. LP
    Inventor: Terence D. La Sorda
  • Patent number: 8540931
    Abstract: An injector insert pipe is arranged in the gas channel of a nozzle for injecting oxygen-containing gas into a pig iron production unit, wherein an interspace which surrounds the pipe is present over the entire pipe length between the wall of the gas channel and the pipe outer wall. The pipe extends at least as far as the nozzle end face which contains the mouth of the gas channel. The pipe space is connected to an oxygen-containing gas feed line, and the interspace is connected to a protective gas supply line. In a process, oxygen-containing gas is fed into the pipe space, which after it has flowed through the pipe, enters the production unit at an entry velocity, and the interspace is simultaneously flowed through by a gas which exits into the production unit at an exit velocity, wherein the entry velocity is greater than the exit velocity.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: September 24, 2013
    Assignees: Siemens Vai Metals Technologies GmbH, Siemens Aktiengesellschaft
    Inventors: Georg Aichinger, Franz Berner, Stefan Lechner, Marinko Lekic-Ninic, Jan-Friedemann Plaul, Johannes Leopold Schenk, Martin Schmidt, Thomas Söntgen, Bogdan Vuletic, Kurt Wieder, Johann Wurm
  • Patent number: 8524146
    Abstract: Disclosed are degassers, couplings, impeller shafts and impellers for use in molten metal. One such coupling transfers gas into an impeller shaft, the coupling having a smooth, tapered internal surface to align with a corresponding surface on the impeller shaft and help prevent gas leakage and to assist in preventing damage to the impeller shaft. Improved impellers for shearing and mixing gas are also disclosed, as is a degasser including one or more of these components.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: September 3, 2013
    Inventor: Paul V. Cooper
  • Patent number: 8520714
    Abstract: An apparatus and method for use in metal melting, refining and/or other processing, such as, for example, steel making in an electric arc furnace (EAF), and more particularly, to improved burner/injector panels and related methods for the introduction of various energy sources, such as, for example, chemical energy, oxygen and particulates into an EAF.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: August 27, 2013
    Assignee: Air Liquide Advanced Technologies U.S. LLC
    Inventor: Christopher K. Higgins
  • Patent number: 8494679
    Abstract: Modern steel production processes require precise knowledge of the current composition and temperature of the liquid metal being processed. In particular during steel production in a converter, high match rates for final carbon content and bath temperature are required. Quantitatively precise blowing of oxygen corresponding to the final target carbon content, and the metal temperature, are decisive factors affecting the economic efficiency of the process and the quality of the steel produced. In order to allow relatively precise process monitoring, various processes and procedures are known, the application thereof being based on measuring exhaust gas composition and on mass flow balances. All models work at an exactness that depends on the precision of the input data, particularly with respect to the weight data of the raw materials and the chemical properties of the metal used.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: July 23, 2013
    Assignee: SMS Siemag Aktiengesellschaft
    Inventor: Johann Reichel
  • Publication number: 20130140748
    Abstract: A system for adding gas to and transferring molten metal from a vessel and into one or more of a ladle, ingot mold, launder, feed die cast machine or other structure is disclosed. The system includes at least a vessel for containing molten metal, an overflow (or dividing) wall, a device or structure, such as a molten metal pump, for generating a stream of molten metal, and one or more gas-release devices.
    Type: Application
    Filed: January 31, 2013
    Publication date: June 6, 2013
    Inventor: Paul V. Cooper
  • Publication number: 20130112042
    Abstract: A ladle that can melt and freeze castable metal in a specific manner so that high quality liquid metal and metal alloys may be produced with minimum oxide and hydrogen content. Upon introduction of a quantity of molten metal into the ladle, staged heating and cooling of the molten metal promotes the liberation of previously-dissolved gases from the castable metal, resulting in significant decreases in as-cast porosity.
    Type: Application
    Filed: November 4, 2011
    Publication date: May 9, 2013
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Qigui Wang, Hengcheng Liao, Lei Zhao, Ye Pan
  • Patent number: 8361379
    Abstract: The present invention includes a molten metal pump and associated components that enable gas to be released into a stream of molten metal. The gas may be released into the molten metal stream (preferably into the bottom of the stream) flowing through a passage. Such a stream may be within the pump discharge and/or within a metal-transfer conduit extending from the pump discharge. The gas is released by using a gas-transfer foot that is positioned next to and is preferably attachable to the pump base or to the metal-transfer conduit. Preferably, the conduit (and/or discharge) in which the gas is released comprises two sections: a first section having a first cross-sectional area and a second section downstream of the first section and having a second cross-sectional area, wherein the second cross sectional area is larger than the first cross-sectional area. Preferably, the gas is released into or near the second section so that the gas is released into an area of relatively lower pressure.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: January 29, 2013
    Inventor: Paul V. Cooper
  • Patent number: 8333921
    Abstract: A coupling assembly includes a motor driven drive shaft. A rotatable refractory shaft is adapted to be connected to a rotor. Locking recesses are formed in an upper end of the refractory shaft. A rotatable coupling includes a body and a device for affixing the drive shaft to the body. Lever arms are fastened to the body and can be pivoted. A recess in the body receives the refractory shaft. Openings in the body extend from an exterior surface of the body to the recess. Each of the lever arms includes a protruding locking member positioned in the opening in the body. Each locking member engages a locking recess. A device exerts a force against the lever arms forcing the locking members into the locking recesses.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: December 18, 2012
    Inventor: Bruno H. Thut
  • Patent number: 8317897
    Abstract: The invention relates to a method and device for supersonically injecting oxygen into a furnace, in particular a cupola furnace, in which the total oxygen required for the furnace operation is injected with the aid of two distinct circuits, i.e., the first circuit comprising at least one supersonic oxygen injecting nozzle and a second circuit which comprises additionally oxygen injecting means and is connected to the first circuit by pressure-sensitive means, such as a discharging device (or upstream pressure adjuster), in such a way that a stable pressure is obtained in the first circuit upon the attainment of the maximum flowrate thereof, wherein the first circuit can consists of several supersonic nozzle groups.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: November 27, 2012
    Assignee: L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Philippe Beaudoin
  • Patent number: 8287803
    Abstract: A novel blaster nozzle used for assisting in the pneumatic removal of cloggings and cakings during the transport of particulate matter through an enclosure housing is set such that it can be removed and replaced from outside the enclosure housing. The blaster nozzle includes a nozzle head having an orifice for the conduction of high-pressure fluid, wherein the nozzle head is composed of a refractory concrete having from about 4-20% by volume metal fibers therein. The blaster nozzle also includes a flange member connected to the nozzle head and a connection tube extends from the flange member for connecting the blaster nozzle to an air cannon.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: October 16, 2012
    Assignee: Wahl Refractory Solutions, LLC
    Inventor: M. David Moore
  • Patent number: 8277721
    Abstract: A method and apparatus for accessing a furnace melt are provided. Preferably, the method and apparatus provide for the safe and efficient access to the melt. According to one aspect of the invention used in a steel-making process in an electric arc furnace, a furnace aperture burner/lance provides a flame for heating the melt, a lance device for injecting oxygen into the furnace, or both. To access the melt, the furnace aperture burner/lance is disengaged, access is provided to the melt through the furnace aperture, and the furnace aperture burner/lance is reengaged when the access is concluded.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: October 2, 2012
    Assignee: Process Technology International, Inc.
    Inventor: Valery Shver
  • Patent number: 8273288
    Abstract: Regulation of the throughflow of metal melt is provided through a bottom nozzle of a metallurgical vessel having an upper nozzle arranged in the floor of the metallurgical vessel and a lower nozzle arranged below the upper nozzle. At least one inert gas inlet aperture is provided to the melt throughflow aperture, and a sensor is arranged on or in the lower nozzle for determining the layer thickness of metal clogging in the nozzle. The inert gas supply into the bottom nozzle is regulated using measurement signals of the sensor. A bottom nozzle for the metallurgical vessel is provided with a wall of the melt throughflow aperture through the nozzles being formed at least sealed against metal melt and the nozzles being at least partially surrounded by a gas-tight housing. The housing at its lower end encloses the lower nozzle at its periphery in a gas-tight manner and is arranged with a portion of its inner side abutting on the outer side of the nozzle.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: September 25, 2012
    Assignee: RHI AG
    Inventor: Martin Kendall
  • Patent number: 8262983
    Abstract: A tilting rotary furnace with a door assembly that seals against a furnace vessel. The seal between the door and the furnace vessel allows for regulation of the internal environment of the furnace and control over thermitting of the aluminum. As a result, aluminum recovery may be carried out without the use of salt. A portion of the door may rotate with the furnace vessel and a portion of the door may remain rotationally stationary with respect to the furnace vessel and the rotating portion of the door.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: September 11, 2012
    Assignee: Altek, L.L.C.
    Inventor: Erik D. Grimm
  • Publication number: 20120200012
    Abstract: The invention relates to a method of using a suspension smelting furnace and to a suspension smelting furnace and to a concentrate burner (4). The concentrate burner (4) comprises a first gas supply device (12) for feeding a first gas (5) into the reaction shaft (2) and a second gas supply device (18) for feeding a second gas (16) into the reaction shaft (2). The first gas supply device (12) comprises a first annular discharge opening (14), which which is arranged concentrically with the mouth (8) of a feeder pipe (7), so that the first annular discharge opening (14) surrounds the feeder pipe (7). The second gas supply device (18) comprises a second annular discharge opening (17), which is arranged concentrically with the mouth (8) of the feeder pipe (7), so that the second annular discharge opening (17) surrounds the feeder pipe (7) opening (14).
    Type: Application
    Filed: October 19, 2010
    Publication date: August 9, 2012
    Applicant: OUTOTEC OYJ
    Inventors: Jussi Sipilä, Markku Lahtinen, Peter Björklund, Kaarle Peltoniemi, Tapio Ahokainen, Lauri P. Pesonen, Kaj Eklund
  • Patent number: 8236234
    Abstract: A container for molten metal includes an outlet for outflow of the molten metal from the container and a temperature measuring device fixed in a wall of the container. The temperature measuring device includes a plug, an outer protective sheath having a closed end, and an inner protective tube having a closed end. The inner protective tube is arranged within the outer protective sheath. A thermocouple is arranged within the inner protective tube. The plug includes a substantially refractory material and the outer protective sheath consists essentially of substantially refractory metal oxide and graphite. The outer protective sheath extends away from the first end of the plug and projects into a recessed portion of the wall of the container. The closed end of the outer protective sheath is arranged in the recessed portion. A junction of the thermocouple is proximate to the closed end of the inner protective tube.
    Type: Grant
    Filed: January 4, 2011
    Date of Patent: August 7, 2012
    Assignee: Heraeus Electro-Nite International N.V.
    Inventor: Martin Kendall
  • Publication number: 20120090432
    Abstract: Various illustrative embodiments of an apparatus and method for reducing the dissolved hydrogen content of a molten metal alloy are provided. The disclosed embodiments can be utilized for the processing of molten metal alloys such as aluminum, and more particularly, for the removal of dissolved hydrogen from molten metal alloys such as aluminum. Gas permeable diffusers can be employed that are wettable by molten metal. When used as gas injectors, either in combination with ultrasonic oscillation or without, the gas permeable wettable diffusers can provide a high density of ultrafine inert gas bubbles that can be used to rapidly and efficiently reduce the level of dissolved hydrogen within the molten metal.
    Type: Application
    Filed: October 18, 2011
    Publication date: April 19, 2012
    Applicant: Alcoa, Inc.
    Inventors: J. Daniel Bryant, Norbert Babcsan
  • Patent number: 8071012
    Abstract: A temperature measuring device for molten metal includes a porous plug with a first end and an opposed second end, an outer protective sheath with a closed end, an inner protective tube with a closed end, and a thermocouple arranged within an interior of the inner protective tube. The outer protective sheath extends away from the first end of the plug and the inner protective tube is arranged within an interior of the outer protective sheath. The porous plug comprises a substantially refractory material and the outer protective sheath consists essentially of substantially refractory metal oxide and graphite. A junction of the thermocouple is proximate to the closed end of the inner protective tube.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: December 6, 2011
    Assignee: Heraeus Electro-Nite International N.V.
    Inventor: Martin Kendall
  • Patent number: 8071013
    Abstract: The invention relates to operating a shaft furnace, in particular a cupola furnace, for melting starting material, wherein the shaft furnace is heated by combustion of a solid fuel and wherein an injection gas, which has an oxygen portion of more than 21%, is injected into the shaft furnace. The shaft furnace is heated by means of at least one burner, wherein a gaseous or liquid fuel and a gaseous oxidant, which encompasses an oxygen portion of more than 21%, is supplied to the burner.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: December 6, 2011
    Inventors: Thomas Niehoff, Peter Kokas
  • Publication number: 20110274942
    Abstract: An aluminum foam product that exhibits superior resistance to corrosion and oxidation in aqueous environments. The invention comprises the incorporation of chemical buffering agents, such as anhydrous borax (Na2B4O7), into the formulation of aluminum foam in amounts that effectively reduce the corrosion and oxidation in aqueous environments.
    Type: Application
    Filed: January 14, 2011
    Publication date: November 10, 2011
    Inventors: J. Daniel Bryant, David F. Iwig
  • Publication number: 20110260378
    Abstract: A water-cooled cover for a treatment vessel for metal melts, wherein the preferably refractorily lined treatment vessel serves in particular for the treatment of liquid metal, in particular of steel, by blowing in solids or gases, or inductive stirring at atmosphere or in vacuum. The cover is formed dome-like, wherein the ratio of inner clear height (h) to inner clear diameter (D) of a flange of the cover is at least 0.2. On the side facing the metal melt, an inner wall of the cover is formed substantially smooth and free of grooves and gaps. Cooling channels arranged on the outer side of the inner wall so that the surface temperature of the inner wall is maintained at a temperature of maximum 350° C.
    Type: Application
    Filed: April 11, 2011
    Publication date: October 27, 2011
    Applicant: INTECO SPECIAL MELTING TECHNOLOGIES GMBH
    Inventors: Harald HOLZGRUBER, Michael LUVEN, Christian BUCHMAIER, Johannes OBITZ
  • Patent number: 8043400
    Abstract: The Inventive System disclosed herein relates to an improved system for extracting metals from ore.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: October 25, 2011
    Inventors: Thomas E. Stephens, Vaughn K. Boyman, Joseph A Diaz, Christopher E. Gordon, Gerald Engdahl