With Cooling Patents (Class 373/76)
  • Patent number: 11390551
    Abstract: A cooling panel for a melter and method for fabricating the cooling panel are disclosed. In particular, the cooling panel can include first and second outer walls and a plurality of side walls coupled to the outer walls that define an interior space. A plurality of baffles is disposed in the interior space, where projections in the baffles fit into respective openings in the outer walls and can be connected from outside the cooling panel. The cooling panel can be formed by way of welding and/or additive manufacturing, as discussed herein.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: July 19, 2022
    Assignee: Owens-Brockway Glass Container Inc.
    Inventors: Shane T. Rashley, Robert Kuhlman, David Soley, Jian Jiao, Walter Anderson, Susan L. Smith
  • Patent number: 11175094
    Abstract: One embodiment is a cooling system for regulating temperature of a surface of a metallurgical furnace. The cooling system includes a plurality of spray conduits. Each spray conduit has one or more control valves and has a plurality of nozzles. A plurality of temperature sensors are disposed proximate the surface of the metallurgical furnace. A control system adjusts the control valves of the plurality of spray conduits in response to temperature information derived from the plurality of temperature sensors.
    Type: Grant
    Filed: October 8, 2018
    Date of Patent: November 16, 2021
    Assignee: Systems Spray-Cooled, Inc.
    Inventors: Scott A. Ferguson, Troy D. Ward, Logan A. Wilson
  • Patent number: 10962287
    Abstract: A water cooled box to be installed in the side wall of a metal making furnace to hold and protect implements such as a burner, a lance, or a material (i.e., carbon or lime) injection device. The box preferably comprises a copper outer shell and a steel inner shell liner welded together, whereby a chamber is formed through which cooling water passes. The box further comprises an inlet and outlet for the water flow and a plurality of conduit passages between the copper and steel shells for mounting the aforementioned implements. The copper shell has bars or slots for slag retention and the steel shell has means for mounting the box into the furnace wall. The copper shell is formed into a curved U-shape for preventing cracking due to thermal mechanical stress and to raise the natural frequency of the panel to resist vibration which can also cause cracking.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: March 30, 2021
    Assignee: Berry Metal Company
    Inventors: Thomas M Kovacic, Kenneth W Geibel, Edward J Green
  • Patent number: 10898949
    Abstract: Techniques and apparatus for electromagnetically stirring a melt material are disclosed. In accordance with some embodiments, the system may include a containment vessel within which a melt material may be disposed. The melt material may include, for example, an electrically conductive alloy, which optionally may be non-ferromagnetic and/or glass-forming. In its molten state, the melt material may have alternating current (AC) applied directly thereto while being immersed in a magnetic field, which may be static or dynamic, depending on the desired stirring effect. Application of the AC and magnetic field may continue as the melt material cools and solidifies, the sinusoidal nature of the AC and the Lorentz force of the magnetic field providing convective motion which tends to agitate the molten melt material in a manner which may realize an improvement in heat transfer and chemical homogeneity of the resultant cast solid.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: January 26, 2021
    Assignee: GLASSY METALS LLC
    Inventor: Eric Dahlgren
  • Patent number: 10610950
    Abstract: A new electrospark deposition (ESD) method and related system are provided in the present invention based on the use of a magnetized electrode, namely magnetic-aided ESD (M-ESD). In particular, the present invention uses a magnetized electrode (either magnetized by an electro-magnet or being a permanent magnet) to attract fine coating powders at the tip thereof which acts as a soft brush to coat on intricate surface profiles. Accordingly, the method of the present invention is able to provide a soft contact between the magnetized anode and the workpiece to be coated or manipulated. The present invention is useful in various surface engineering applications in the fields of aeronautical (e.g. restoration and repair of damaged aircraft turbine blades), nuclear reactors, military engineering, and in medical industries.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: April 7, 2020
    Assignee: The Hong Kong Polytechnic University
    Inventors: Jiang Wen Liu, Tai Man Yue, Zhichao Liu
  • Patent number: 9618266
    Abstract: The present invention relates generally to a ladle metallurgy furnace having an improved roof structure. The improved roof may comprise an internal surface structure having a substantially smooth exterior surface, an external surface structure spaced apart from the internal surface structure, a plurality of channels that are defined intermediate the internal and external surface structures, a supply port in fluid communication with at least one channel through the second surface structure and in further fluid communication with a supply line, and a return port in fluid communication with at least one channel through the external surface structure and in further fluid communication with a return line.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: April 11, 2017
    Assignee: Superior Machine Co. of South Carolina, Inc.
    Inventor: Kenneth L. Carraway
  • Patent number: 8891584
    Abstract: The present invention provides a shaft high temperature continuous graphitizing furnace comprising a furnace body comprising a feeding inlet and a discharging outlet, an electrode pair, a cooling system and a discharging device; the furnace body is designed to be a shaft cylindrical structure; the electrode pair is provided within the furnace body and comprise an upper electrode and a lower electrode, the upper electrode is located below the feeding inlet, and an umbrella or cone table shape electric field having a lower cross section area greater than its upper cross section area arises between the upper electrode and eh lower electrode; and the cooling system is located between the lower electrode and the discharging outlet.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: November 18, 2014
    Assignee: Miluo Xinxiang Carbon Products Co., Ltd
    Inventor: Yinghe Li
  • Patent number: 8780952
    Abstract: A roof system for an electric arc furnace includes a skew removably attached to the electric arc furnace, a lining of refractory material affixed to the skew, and a delta composed of a refractory material. The delta has at least one aperture capable of receiving an electrode. The delta fits onto and is supported by the refractory lining that is affixed to the skew.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: July 15, 2014
    Inventors: John W. Schwer, Thomas J. Schwer
  • Publication number: 20140105240
    Abstract: An improved method of operating an arc furnace is provided. The sidewall of the furnace includes a refractory lining. A charge of scrap metal is added to the furnace. The charge is melted and a slag layer is formed on the top of the melting charge. The furnace is tapped at the bottom to remove a portion of the melted charge. After tapping the furnace, the slag is splashed onto the sidewall to thereby coat the sidewall with a frozen slag layer.
    Type: Application
    Filed: June 22, 2012
    Publication date: April 17, 2014
    Applicant: GRAFTECH INTERNATIONAL HOLDINGS INC.
    Inventor: Brian Bowman
  • Patent number: 8557174
    Abstract: The invention relates to a process for the separation and recovery of non-ferrous metals from zinc-bearing residues, in particular from residues produced by the zinc manufacturing industry. The process comprises the steps of:—subjecting the residue to a flash or agitated bath fuming step, thereby producing an Fe bearing slag and Zn- and Pb-bearing fumes; and—extracting the Zn- and Pb-bearing fumes and valorizing Zn and Pb; characterized in that CaO, SiO2 and MgO are added as a flux before or during the fuming step so as to obtain a final slag composition with: formula (I) all concentrations being expressed in wt %. The invention also relates to a single-chamber reactor for Zn-fuming equipped with one or more submerged plasma torches as heat and gas sources. [ Fe ] [ SiO 2 ] + [ CaO ] [ SiO 2 ] + [ Mg ? O ] 3 > 3.5 ; ? ? 0.1 < [ CaO ] [ SiO 2 ] < 1.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: October 15, 2013
    Assignee: Umicore
    Inventors: Maurits Van Camp, Jonathan Aerts, Benedict Janssens, Sven Santen
  • 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
  • Publication number: 20130016754
    Abstract: The invention relates to an injector cooling block (1) for holding at least one injector (2) for introducing a medium into a metallurgical vessel (3), especially into an electric arc furnace, the injector cooling block (1) being arranged in or on a wall (4) of the metallurgical vessel (3). The injector block (1) comprises at least one plate (5) in which a cooling channel or a cooling bore (6) through which cooling medium can flow are arranged, said cooling channel or cooling bore (6) separating a hot zone (7) from a cold zone (8). In order to better detect temperatures or stresses in the injector cooling block, at least one measuring element (9) for measuring the temperature and/or the mechanical elongation is arranged in the hot zone (7), the measuring element (9) comprising at least one optical waveguide (10) which is integrated into the hot zone (7) or fastened to the hot zone (7).
    Type: Application
    Filed: January 18, 2011
    Publication date: January 17, 2013
    Applicant: SMS SIEMAG AKTIENGESELLSCHAFT
    Inventors: Gereon Fehlemann, Dirk Lieftucht
  • Patent number: 8089999
    Abstract: A pipe and method of use for deterring or encouraging the retention of slag or other material in the operating area of a metal processing system as desired. The deterring pipe(s) and the encouraging pipe(s) may be combined with other deterring pipe(s) and/or other encouraging pipe(s) in any combination as desired.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: January 3, 2012
    Assignee: AmeriFab, Inc.
    Inventor: Richard J. Manasek
  • Patent number: 8003043
    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 molten metal melt in a furnace. According to one aspect of the invention used in a steel making process in an electric arc furnace, a furnace aperture plug is reciprocated through a furnace aperture, the furnace aperture plug is retracted from the furnace aperture, access is provided to the molten metal melt in the furnace, and the furnace aperture plug is reinserted into the furnace aperture when the access is concluded.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: August 23, 2011
    Assignee: Process Technology International, Inc.
    Inventor: Valery Shver
  • Patent number: 7951325
    Abstract: The present invention generally relates to apparatuses and methods 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 panels and related methods for the introduction of various energy sources, such as, for example, chemical energy and particulates.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: May 31, 2011
    Assignee: Air Liquide Advanced Technologies U.S. LLC
    Inventors: Christopher K. Higgins, Serban Cantacuzene, Yury Eyfa
  • Patent number: 7832367
    Abstract: A furnace panel leak monitoring and control system for fluid-cooled panels in high temperature industrial furnaces such as, for example, smelting furnaces, blast furnaces and electric arc furnaces. The system performs at least two and up to four functions simultaneously. At minimum, the system includes one or more temperature sensors received within the body of the panel to monitor temperature within the metal of the panel itself, and pressure sensors installed proximate the inlet and outlet of each panel coolant fluid circuit, which circuits are preferably periodically automatically tested, to check for leaks in the coolant circuits. In addition, the system preferably includes temperature and flow sensors for monitoring the furnace panel coolant circuit(s) for temperature and flow fluctuations, respectively, which may be indicative of leaking cooling circuits. The system triggers visual and/or audible alarms to alert a human operator of an apparent coolant fluid leak situation.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: November 16, 2010
    Assignee: Berry Metal Company
    Inventors: Louis Scott Valentas, Eric Paul Tierney
  • Patent number: 7824604
    Abstract: The present invention generally relates to apparatuses and methods 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 cooling systems and related methods for use in an extended burner panel.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: November 2, 2010
    Assignee: Air Liquide Advanced Technologies U.S. LLC
    Inventors: Christopher K. Higgins, Serban M. Cantacuzene, James M. Cochran, Yury Eyfa
  • Patent number: 7704443
    Abstract: Apparatus, systems and methods for carbothermically producing aluminum are disclosed. The systems may include a reactor and an electrical supply. The reactor may include a plurality of side-entering electrodes and a top-entering electrode. The electrical supply may be operable to supply multiphase current to the side-entering electrodes and/or the top-entering electrodes. The electrodes may be in communication with a molten bath of the reactor, and the multiphase current supplied thereto may be passed through the bath to heat the reactor. The amount of current supplied to various electrode sets may be adjusted to facilitate tailored heating of the molten bath.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: April 27, 2010
    Assignees: Alcoa, Inc., Elkem AS
    Inventors: Joseph A. Lepish, Gerald E. Carkin
  • Patent number: 7704444
    Abstract: A method and apparatus for testing characteristics of a furnace melt are provided. Preferably, the method and apparatus provide for the safe and efficient testing of metal temperature and composition of molten metal during the melt cycle of the metal. According to one aspect of the invention used in a steel making process in an electric arc furnace, a furnace probe is reciprocated through a furnace probe plug aperture, the furnace probe is retracted from the furnace probe plug aperture, a furnace probe is inserted through the furnace probe plug aperture, the furnace probe is retracted from the aperture, and the furnace probe aperture plug is inserted into the furnace probe plug aperture.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: April 27, 2010
    Assignee: Process Technology International, Inc.
    Inventor: Valery G. Shver
  • Patent number: 7704445
    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 molten metal melt in a furnace. According to one aspect of the invention used in a steel making process in an electric arc furnace, a furnace aperture plug is reciprocated through a furnace aperture, the furnace aperture plug is retracted from the furnace aperture, access is provided to the molten metal melt in the furnace, and the furnace aperture plug is reinserted into the furnace aperture when the access is concluded.
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: April 27, 2010
    Assignee: Process Technology International, Inc.
    Inventor: Valery G. Shver
  • Patent number: 7544321
    Abstract: A process container comprising a metallic casing having at least one refractory cladding layer disposed on the inner side thereof, and cooling elements connected to the outer side of the casing. Each cooling element comprises a base plate and at least one cooling channel connected to the base plate in a heat-conducting manner. The base plate is connected to the outer side of the casing by being screw connected to threaded bolts welded onto the outer side of the casing whereby the base plates nestle against the casing by flexural deformation due to clamping pressure of the screw connections. Ends of the cooling channels are connected to ends of adjacent cooling channels.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: June 9, 2009
    Assignees: Maerz-Ofenbau AG, Berzelius Stolberg GmbH
    Inventors: Andreas Loebner, Reinhard Püllenberg
  • Publication number: 20090129428
    Abstract: A cooling device for use in an electric arc furnace is provided. The cooling device provides a novel and effective method for cooling burners, lances, enclosures, and other devices used in high heat environments, such as in Electric Arc Furnaces. According to one aspect of the invention used in a steel making process in an electric arc furnace, a cooling tube is inserted into a cooling cavity in a burner. Cooling fluid is injected through the cooling tube into the cavity to cool the portions of the burner adjacent the cooling cavity. The cooling fluid is then extracted from the cavity through a concentric space between the cooling tube and the cooling cavity. According to another aspect of the present invention, a cooling fluid distribution flange is provided to distribute cooling fluid to a plurality of cooling tubes to inject cooling fluid into a plurality of associated cooling cavities.
    Type: Application
    Filed: January 23, 2009
    Publication date: May 21, 2009
    Inventor: Valery Shver
  • Patent number: 7483471
    Abstract: A cooling device for use in an electric arc furnace is provided. The cooling device provides a novel and effective method for cooling burners, lances, enclosures, and other devices used in high heat environments, such as in Electric Arc Furnaces. According to one aspect of the invention used in a steel making process in an electric arc furnace, a cooling tube is inserted into a cooling cavity in a burner. Cooling fluid is injected through the cooling tube into the cavity to cool the portions of the burner adjacent the cooling cavity. The cooling fluid is then extracted from the cavity through a concentric space between the cooling tube and the cooling cavity. According to another aspect of the present invention, a cooling fluid distribution flange is provided to distribute cooling fluid to a plurality of cooling tubes to inject cooling fluid into a plurality of associated cooling cavities.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: January 27, 2009
    Assignee: Process Technology International
    Inventor: Valery Shver
  • Patent number: 7452499
    Abstract: A cooling system for the distribution and collection of a fluid coolant in a metallurgical vessel used in the processing of molten materials. The cooling system comprises a distribution system including an intake manifold, a plurality of headers attached to the intake manifold, and a plurality of distribution dispensers positioned along each header. A collection system, including a collection manifold, is positioned to collect the fluid coolant. The distribution dispensers are positioned to direct the fluid coolant towards the collection manifold and utilize the majority of the kinetic energy contained within the coolant to direct the coolant towards the collection manifold.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: November 18, 2008
    Assignee: Systems Spray-Cooled, Inc.
    Inventors: Mark Thomas Arthur, J. Michael Campbell, Troy D. Ward
  • Publication number: 20080144692
    Abstract: An electric arc furnace (10) has an outer shell (12) and an inner refractory lining (24). During its operation the electric arc furnace (10) contains a bath (28) of molten metal which has a minimum and a maximum operational level (32). An inner cooling ring (23) of copper slabs (20), which are in thermo-conductive contact with the inner refractory lining (24) and equipped with spray cooling means (22), is mounted to the outer shell (12) in the region (34) between the minimum and the maximum operational level (32).
    Type: Application
    Filed: February 28, 2006
    Publication date: June 19, 2008
    Applicant: PAUL WURTH S.A.
    Inventors: Emile Lonardi, Jean-Luc Roth, Paul Tockert
  • Patent number: 7217123
    Abstract: A cooled furnace wall comprises a furnace shell with an inner and an outer side and cooling plates lining the inner side of the furnace shell. Each of the cooling plates has a plate body and protruding connection pieces for supplying the cooling plate with a coolant. The furnace shell has connection openings therein for interconnecting the connection pieces of adjacent connection plates from the outer side of the furnace shell. At least one of the connection pieces is formed by a tube bend that protrudes from an edge face of the plate body and that has a connection end to extending through one of the connection openings in the furnace shell.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: May 15, 2007
    Assignee: Paul Wurth S.A.
    Inventor: Robert Schmeler
  • Patent number: 6870873
    Abstract: A slag retainer for protecting a water-cooled furnace element through the use of an elongate metal member which extends from inside the furnace, through the furnace wall and into the cooling water of the furnace element so that the insert can be continuously cooled and collected and retain a protective mass of slag.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: March 22, 2005
    Assignee: Systems Spray-Cooled, Inc.
    Inventors: Kelly Gene Lyons, Mark Thomas Arthur
  • Patent number: 6742699
    Abstract: A method for manufacturing a cooling element comprising a housing part and ceramic lining elements arranged on the housing part surface. The ceramic lining elements (2) are connected to the element housing part (1) by using in the joint between the lining elements and the housing part a soldering/brazing agent, wherein at least the junction area is heated at least up to the melting temperature of the soldering/brazing agent, so that there is created a joint with a good thermal contact with the element housing part (1) and a ceramic lining element (2). The invention also relates to a cooling element.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: June 1, 2004
    Assignee: Outokumpu Oyj
    Inventors: Risto Saarinen, Yrjö Leppänen
  • Patent number: 6693949
    Abstract: The aim of the invention is to provide a means of also cooling the lower part of electric arc furnaces and/or resistance furnaces. To this end, said lower part—the actual melting vessel (4)—is surrounded with a jacket (9) at a certain distance, forming a shell, and the resulting intermediate space is configured as a cooling device (10) and subjected to the action of a cooling medium (14).
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: February 17, 2004
    Assignee: SMS Demag AG
    Inventors: Manfred Schubert, Peter Starke
  • Patent number: 6580743
    Abstract: A stave cooler used for cooling a furnace wall of a metallurgical furnace such as a blast furnace, having a structure in which cooling pipes to cool a metal base are cast on the side opposite the furnace interior side of the metal base and a heat resistant steel plate having openings or a lamination of heat resistant steel plates having openings is cast, in a prescribed thickness, in the furnace interior side surface of the metal base. It is acceptable to form the lamination suitably into a rectangular parallelepiped and cast it, in a plurality, in the furnace interior side of the metal base. The wear rate of the furnace interior side surface of the stave cooler is small, and its structure prevents the heat resistant steel plate(s) from falling out by thermal expansion of the stave cooler proper or wearing locally.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: June 17, 2003
    Assignee: Nippon Steel Corporation
    Inventors: Mitsuji Hirata, Kazushi Kishigami
  • Patent number: 6563855
    Abstract: A metal-made water-cooling jacket for electric arc furnaces, characterized by comprising an Al diffusion layer having a thickness ranging from 200 to 800 &mgr;m, the Al concentration of the outermost surface of the Al diffusion layer being from 10 to 50 wt. %, formed on the surface of the metal by calorizing treatment.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: May 13, 2003
    Assignee: Shinto Kogyo Kabushiki Kaisha
    Inventors: Makoto Nishi, Masao Maesato, Tosirou Takami
  • Publication number: 20030053514
    Abstract: A metallurgical furnace, which includes a furnace shell, an exhaust system, and a gas cleaning system, further includes a plurality of improved pipes and fume ducts throughout to increase operational life and productivity. The pipes and fumes ducts are comprised of an aluminum-bronze alloy which provides enhanced properties over prior art materials including thermal conductivity, modulous of elasticity and hardness. The use of the alloy also minimizes maintenance requirements of the pipes and fume ducts, thereby extending their operational life. In operation, gases formed from smelting or refining are evacuated from the furnace shell through the exhaust system into the gas cleaning system. The gases, as well as the system, are water cooled by way of the plurality of pipes displaced throughout.
    Type: Application
    Filed: September 11, 2002
    Publication date: March 20, 2003
    Inventors: Richard J. Manasek, David P. Kincheloe
  • Patent number: 6404799
    Abstract: A water-cooled panel for the furnace wall and furnace roof of an electric-arc furnace is integrally fabricated of refractory bricks arrayed on the furnace inner wall in multiple regularly spaced rows to be exposed at the end surfaces and cooling water pipes installed between the rows of refractory bricks (2). A furnace exterior side of the refractory bricks and a furnace interior side of a cooling water pipe are overlapped in a vertical direction of the water-cooled panel, and the cooling water pipe is provided in between an upper and lower side of refractory bricks.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: June 11, 2002
    Assignee: Nippon Steel Corporation
    Inventors: Tadashi Mori, Shinjiro Uchida, Koichi Kirishiki
  • Patent number: 6330269
    Abstract: An apparatus and method for cooling the interior wall of an electric arc furnace. The device is an extruded heavy-walled pipe having a base and a fin or plurality of fins. Such pipes are attached to a plate in serpentine fashion and hung on the inside wall of the electric arc furnace above the hearth, thereby forming a cooling surface between the interior and the furnace wall. The fins are sized and arranged to retain splattered slag. The slags solidifies on the pipes, forming an insulation barrier between the molten iron material and the cooling pipes and, consequently, the wall of the furnace.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: December 11, 2001
    Assignee: Amerifab, Inc.
    Inventors: Richard J. Manasek, David P. Kincheloe
  • Patent number: 6249538
    Abstract: Cooling device with panels for electric arc furnaces, employed in an electric furnace in cooperation with the vertical sidewall located above the lower shell (11) of the furnace and/or with the roof (18), the furnace comprising a lower shell (11) to contain the bath of liquid metal (12) and an overhead upper shell defined by a plurality of panels (16) consisting of cooling tubes (17), the upper shell being covered by the roof (18), the lower shell (11) including a containing element (15) made of metal on the outer part, the internal refractory including an upper edge (11a) located approximately at the upper line of the layer of slag (14) present above the bath of molten metal (12), each panel (16) including an outer layer (19a), an intermediate layer (19b) and at least an inner layer (19c) of cooling tubes (17), the layers developing vertically along the vertical sidewall of the furnace above the refractory edge of the lower shell (11), the cooling tubes (17), the layers developing vertically along the vertic
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: June 19, 2001
    Assignee: Danieli & C. Officine Meccaniche
    Inventors: Milorad Pavlicevic, Alfredo Poloni, Peter Tishchenko, Angelico Della Negra
  • Patent number: 6185242
    Abstract: Spray cooled side wall and tap hole cover for an eccentric bottom tap (EBT) electric furnace which is unitary, i.e. one-piece, and has an inter-connected coolant supply and inter-connected spent coolant drain.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: February 6, 2001
    Assignee: South Carolina Systems, Inc.
    Inventors: Mark Thomas Arthur, Frank Henry Miner, Gordon Raymond Roberts
  • Patent number: 6144689
    Abstract: A cooling plate for shaft furnaces, particularly blast furnaces, is provided with a refractory lining and is composed of copper or a low-alloy copper alloy with cooling medium ducts, wherein the cooling plate is made from a wrought or rolled ingot, and wherein the cooling plate has on one side thereof, i.e., the front side, grooves for receiving refractory material. Cooling ducts are provided on the rear side of the cooling plate, wherein the cooling ducts are defined in part by the cooling plate itself and in part by sheet metal or sheet steel, wherein the cooling ducts are produced by milling cutting in the rear sides of the cooling plate and/or the sheet metal or sheet steel.
    Type: Grant
    Filed: January 5, 1999
    Date of Patent: November 7, 2000
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Karl-Heinz Schmialek, Hartmut Hille, Werner Otremba, Peter Heinrich
  • Patent number: 6137823
    Abstract: An electric arc furnace comprises a bottom, a roof and a side wall. The side wall is formed from a plurality of bimetal panels each having an inner copper face and an outer steel face. The roof may be formed with similar bi-metal panels. The hollow panels include internal baffles to define channels through which cooling water flows. The copper face is smooth and free of welds so as to maximize thermal heat transfer by the panels. The copper face enhances thermal efficiency and minimizes maintenance requirements of the panels, while the steel face reduces manufacturing costs of the panels.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: October 24, 2000
    Assignee: J. T. Cullen Co., Inc.
    Inventors: Eric N. Johnson, Roger E. Johnson, Craig S. Johnson
  • Patent number: 6104743
    Abstract: In an electric arc furnace cooling apparatus in which cooling water is made to flow into a plurality of water-cooled panels provided around side walls of a furnace body of an electric arc furnace to thereby cool the furnace body, a water collecting trough is provided in a platform mounted in the electric arc furnace to thereby collect waste water discharged from the water-cooled panels, and a water receiving trough is provided outside the platform to thereby receive waste water discharged from the water collecting trough.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: August 15, 2000
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Tamotsu Nomura, Nagatoshi Hayakawa, Yoshinobu Masuya
  • Patent number: 6031861
    Abstract: The present invention relates to an electrode for a metallurgical vessel and to a cooling element for a wall of a metallurgical vessel. In particular, the present invention provides an electrode and a cooling element having a cavity, a device for cooling by spraying a cooling medium into the cavity, and a collecting device for collecting molten metal that breaks through the cavity. The present invention also relates to a DC arc furnace comprising at least one electrode of the present invention.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: February 29, 2000
    Inventor: Volkwin Koster
  • Patent number: 6028882
    Abstract: A cooling and heat recovery system for chemical processing vessels. An inner vessel is located within an outer vessel, defining a gap between the two vessels. A heat removal agent is pumped in and out of the gap thereby cooling the wall of the inner vessel which is exposed to exceedingly high temperatures within its interior. Baffling is provided within the gap to ensure the uniform and continuous flow of heat removal agent within the gap. The design of the system increases the rate and efficiency at which heat is transferred from the inner vessel wall to the heat removal agent. In one embodiment, at least one helical bar attached to the inner vessel wall enhances the heat transfer rate and efficiency. Each helical bar generates turbulent flow of the heat removal agent, which in turn enhances the heat transfer between the inner vessel wall and the heat removal agent.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: February 22, 2000
    Inventor: Strom W. Smith
  • Patent number: 5772430
    Abstract: Cooling device with panels for arc electric furnaces, which is used in an electric melting furnace in cooperation with the vertical sidewall placed above the lower shell (11) of the furnace, the furnace comprising in its lower part one lower shell (11) to contain a bath (12) of melting metal and an upper shell defined by a plurality of panels (16) comprising a plurality of cooling tubes (17), the lower shell (11) including at its outer part a metallic containing element (15), the inner refractory having an upper edge (19) located substantially at the level of the upper edge of the layer of slag (14) contained above the bath (12) of melting metal, each panel (16) including an outer layer (116) and at least an inner layer (22) of cooling tubes (17), the layers (116, 22) developing vertically along the vertical side wall of the furnace above the refractory edge of the lower shell (11) and being separated by an interspace (23).
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: June 30, 1998
    Assignee: Danieli & C. Officine Meccaniche SpA
    Inventors: Milorad Pavlicevic, Gianni Gensini, Alfredo Poloni, Romano Sellan
  • Patent number: 5743729
    Abstract: Cooling device with panels for arc electric furnaces, which is used in an electric melting furnace in cooperation with the vertical sidewall placed above the lower shell (11) of the furnace, the furnace comprising in its lower part one lower shell (11) to contain a bath (12) of melting metal and an upper shell defined by a plurality of panels (16) comprising a plurality of cooling tubes (17), the lower shell (11) including at its outer part a metallic containing element (15), the inner refractory having an upper edge (19) located substantially at the level of the upper edge of the layer of slag (14) contained above the bath (12) of melting metal, at least part of the outer panel (16) consisting of a horizontal row (18) of cooling tubes (17) arranged slightly above a substantial part of the upper refractory edge (19) of the lower shell (11).
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: April 28, 1998
    Assignee: Danieli & C. Officine Meccaniche SpA
    Inventors: Milorad Pavlicevic, Gianni Gensini, Alfredo Poloni, Romano Sellan
  • Patent number: 5740196
    Abstract: An end cap is provided for adjacent pipes in the cooling coils of an electric air furnace. Each end cap includes parallel opposite side walls and a curved end portion connecting the side walls. The side walls and end portion define a perimeter edge, the outer portion of which is beveled. The end cap includes a pair of tabs extending from each side wall. The tabs partially fill the crevice between adjacent end pipes so as to provide a stronger weld between the end cap and the pipes. Internal turning vanes in the end cap minimize turbulence of the liquid coolant flowing through the pipes. Similar turning vanes can be provided in the 90.degree. elbows of the cooling coils.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: April 14, 1998
    Assignee: J.T. Cullen Co., Inc.
    Inventors: Eric N. Johnson, Roger E. Johnson, Craig S. Johnson
  • Patent number: 5719897
    Abstract: In order to reduce the power loss of a direct current arc furnace the furnace vessel is only partially cooled in the region situated above the melting zone. A first cooling device is provided on a top edge of the vessel. A second cooling device is provided at the height of a slag line. The region of a vessel wall situated therebetween and facing the interior of the vessel above the slag line consists essentially of refractory material.
    Type: Grant
    Filed: August 15, 1995
    Date of Patent: February 17, 1998
    Assignee: Asea Brown Boveri AG
    Inventors: Erik Alfred Lassander, Sven-Einar Stenkvist
  • Patent number: 5561685
    Abstract: Spray cooled side-wall assembly for an electric arc furnace which includes individual spray cooled segments joined together to form a furnace side-wall. One or more of the segments can be arch-shaped and surround a spray cooled sub-assembly to address conditions of high thermal stress.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: October 1, 1996
    Assignee: UCAR Carbon Technology Corporation
    Inventors: David A. Lehr, Gordon R. Roberts, Frank H. Miner, William H. Burwell, Mark T. Arthur
  • Patent number: 5548612
    Abstract: A cover with a spray cooling system for the main body of an electric furnace is of a double-layered structure with a hollow inner space in which are provided a plurality of spray nozzles such that cooling water sprayed therefrom will cool the cover. A water collecting box with one or more water outlets is attached to the outer circumferential side surface of the cover such that its bottom surface is below the bottom surface of the cover, and the interior of the box is connected to the hollow inner space of the cover such that the sprayed cooling water can be discharged without the use of a vacuum pump and does not cover the inner surface of the inner space to prevent uniform and efficient cooling of the cover.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: August 20, 1996
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Kunio Matsuo, Tamotsu Nomura
  • Patent number: 5426664
    Abstract: A cooling panel for use in drawing off excess heat from and protecting the side walls and roof of a furnace such as an electric arc furnace, the cooling panel being preferably made entirely out of oxygen-free pure copper. The cooling panel is a wall having a series of strips welded on one side, the strips having recesses on the side adjacent the wall to form channels between the strips and wall for circulating a cooling fluid therethrough. The cooling panel is also provided with inlet and outlet manifolds for supplying and removing the cooling fluid to the passages of the cooling panel. The strips and the manifolds are preferably made using an extruding process and assembled using a tungsten inert gas welding process.
    Type: Grant
    Filed: February 8, 1994
    Date of Patent: June 20, 1995
    Assignee: Nu-Core, Inc.
    Inventor: Robert C. Grove
  • Patent number: 5241559
    Abstract: An electric arc furnace has a dished hearth, vertical side walls, and a relatively flat roof consisting of a center portion, a relatively planar outer portion and a cylindrical skirt which abuts the side wall to define a space above and around the expected surface of the furnace charge wherein CO containing waste gases can be oxidized to minimize CO and promote heat transfer to the furnace charge. The roof center portion is refractory having holes for receiving electrodes and the outer portion is formed of water-cooled pipes which define sections of the annulus. The upper end of the side walls is also formed of water-cooled panels.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: August 31, 1993
    Assignee: EMC International, Inc.
    Inventor: Dennis L. Hixenbaugh
  • Patent number: 5197080
    Abstract: An end cap is provided for adjacent pipes in the cooling coils of an electric air furnace. Each end cap includes parallel opposite side walls and a curved end portion connecting the side walls. The side walls and end portion define a perimeter edge, the outer portion of which is beveled. The end cap includes a pair of tabs extending from each side wall. The tabs partially fill the crevice between adjacent end pipes so as to provide a stronger weld between the end cap and the pipes. The curvature of the end cap minimizes turbulence of the liquid coolant flowing through the pipes.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: March 23, 1993
    Assignee: J. T. Cullen Co., Inc.
    Inventors: Eric N. Johnson, Roger E. Johnson, Craig S. Johnson