With Cooling Patents (Class 373/74)
  • Patent number: 10871328
    Abstract: A method of quickly changing a portion of the roof of an electric arc furnace having a top loading roof system comprising providing at least one pie-shaped water cooled panel supported below the roof support beams and located to protect the underside hot face of the roof support beams, providing at least one quick water disconnect for connecting the at least one pie-shaped water cooled panel to a water supply, raising and removing the at least one pie-shaped water cooled roof panel, replacing the at least one pie-shaped water cooled roof panel with another pie-shaped water cooled panel or repairing the at least one pie-shaped water cooled roof panel, and continuing operation of the furnace.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: December 22, 2020
    Assignee: AMERIFAB, INC.
    Inventor: Richard J. Manasek
  • Patent number: 9849548
    Abstract: The present disclosure relates to a method of manufacturing a cooling block for a hot stamping mold using a three-dimensional (3D) metal printer, and more particularly, to a method of manufacturing a cooling block for a hot stamping mold using a 3D metal printer including a process of first step for forming a plurality of semicircular channels through which a fluid passes on a lower block, and a process of second step for forming an upper block to form channels using a 3D metal printer respectively on the plurality of semicircular channels formed in the lower block along the plurality of semicircular channels.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: December 26, 2017
    Assignee: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY
    Inventors: Ji Hyun Sung, Myoung Pyo Hong, Woo Sung Kim, Chang Yeul Shin, Ki Man Bae, Ji Hyun Kim
  • Patent number: 9612027
    Abstract: Cooling system and method suitable for cooling a blast furnace with a cooling fluid during its operation. The cooling system includes a source of a gaseous fluid that feeds the gaseous fluid to multiple flow paths. A liquid is atomized into each of the multiple flow paths, within which the atomized liquid is mixed with the gaseous fluid to form a mist. The system further includes means for selectively closing each of the multiple flow paths while at least one other of the multiple flow paths remains open.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: April 4, 2017
    Assignee: CIM-Tech, Inc.
    Inventors: Rudy C. Tolkamp, Brian P. Greubel
  • 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: 8858867
    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: February 1, 2011
    Date of Patent: October 14, 2014
    Assignee: Superior Machine Co. of South Carolina, Inc.
    Inventor: Kenneth L. Carraway
  • Publication number: 20140029643
    Abstract: Disclosed herein is a roof for an electric furnace. The roof includes: a small-ceiling seating port (120) which has a small-ceiling seating surface (122) and a small-ceiling support surface (124) that extends from the small-ceiling seating surface inwards and downwards; and a large ceiling (130) which has an upper roof panel (132) that radially extends from the small-ceiling seating port at a downward inclination angle, a lower roof panel (134) disposed below the upper roof panel at a position spaced apart from the upper roof panel, and a side roof panel (136) connected to the upper roof panel and the lower roof panel. The upper roof panel is connected to the outer circumferential surface of the small-ceiling seating port, and the lower roof panel is connected to a lower end of the small-ceiling support surface so that the inclination angle of the lower roof panel can be increased.
    Type: Application
    Filed: September 27, 2013
    Publication date: January 30, 2014
    Applicant: HYUNDAI STEEL COMPANY
    Inventor: Sang-Hoon Lee
  • Patent number: 8603387
    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: Grant
    Filed: April 11, 2011
    Date of Patent: December 10, 2013
    Assignee: Inteco Special Melting Technologies GmbH
    Inventors: Harald Holzgruber, Michael Luven, Christian Buchmaier, Johannes Obitz
  • Patent number: 8202476
    Abstract: A heat exchanger system is disclosed. The heat exchanger system may be comprised of a front plate and a base plate, wherein piping is fitted with spray nozzles that direct a spray of the cooling fluid on a backside of the front plate. The front plate is preferably fabricated out of aluminum bronze alloy.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: June 19, 2012
    Assignee: AmeriFab, Inc.
    Inventors: Richard J. Manasek, David P. Kincheloe
  • Patent number: 7644752
    Abstract: A regulating heat exchange and cooling method and system for monitoring and controlling the temperatures of walls subjected to high temperatures. The system is used to cool the inner wall of a thermal system having a double wall, the inner wall being subjected to temperatures equal to or greater than the physical capacity thereof. The system includes a network of tubes which is independent of the thermal system to be cooled. The tubes contain pressurized cooling water which circulates therethrough. The tubes have nozzles which spray and project water in the form of solid cones against the inner wall, the nozzles being controlled by adjustable-flow valves. The network of tubes forms an integral part of the outer wall of the thermal system to be cooled and the system also includes elements for maintaining the water projection area defined by the inner and outer walls in a vacuum condition.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: January 12, 2010
    Assignee: Bio 3D Applications
    Inventor: Raymond Guyomarc′h
  • Patent number: 7625517
    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: November 19, 2007
    Date of Patent: December 1, 2009
    Assignee: Systems Spray-Cooled, Inc.
    Inventors: Mark Thomas Arthur, J. Michael Campbell, Troy D. Ward
  • 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: 7306763
    Abstract: A metallurgical vessel for a melting device for liquid metals has a vessel top, a vessel bottom provided with a collar, and an intermediate ring arranged between the vessel top and the vessel bottom. The vessel bottom receives a melt defining a melting zone within the vessel bottom and, above the melting zone, a slag zone for slag is provided. The intermediate ring is arranged at a level of the slag zone. The vessel top completely bridges the intermediate ring and is supported below the intermediate ring on the collar of the vessel bottom so that the intermediate ring is statically completely relieved of any load.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: December 11, 2007
    Assignee: SMS Demag Aktiengesellschaft
    Inventor: Manfred Schubert
  • 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: 6655955
    Abstract: A coolable arched roof for a high-temperature melting furnace having a furnace interior. At least the following layers are present on that side of a layer of refractory bricks, which is remote from the furnace interior: a sealing layer, which is used to seal the furnace interior against the leakage or penetration of gas; an insulation layer having a thermally insulating action; and a cooling layer, which is designed to carry a cooling fluid. The arrangement of layers results in an increased gastightness and prevents premature aging of the refractory bricks.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: December 2, 2003
    Assignee: Von Roll Umwelttechnik AG
    Inventors: Erwin Wachter, Klaus Zoss, Bruno Andreoli, Werner Seglias
  • 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
  • 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: 6535543
    Abstract: Device to take in fumes and cool the roof (10) of electric furnaces. The device has a central aperture (11) into which an electrode can be inserted and a peripheral aperture (12) to take in and discharge the fumes. The device also has a first cooling system (13) for a central zone surrounding, and cooperating with, the central aperture (11), and a second system (15) to take in and convey the fumes. The first cooling system (13) includes a circular cyclone chamber (18) having a plurality of turns (19) able to cool the zone surrounding the central aperture (11).
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: March 18, 2003
    Assignee: Danieli & C. Officine Meccaniche S.p.A.
    Inventors: Peter Tischenko, Angelico Della Negra, Milorad Pavlicevic, Alfredo Poloni
  • Patent number: 6418157
    Abstract: A roof (3) for a metallurgical ladle/furnace (L.A.F) (1) comprising a self-supporting structure of metallic pipework (4) defining at least one flow circuit for cooling water, with a lower end having a circular peripheral flange (A), with a cylindrical body member (c) of smaller diameter than the flange (A) located above the flange (A) (in use away from the ladle/furnace), and is provided with an end wall (14) having a plurality of apertures (14) each to receive, in a gas-tight manner, a carbon electrode (8), and an aperture (5) for fume extraction provided in the arcuate wall (16) of the cylindrical body member.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: July 9, 2002
    Assignee: RHS Paneltech Limited
    Inventor: Peter Fox
  • 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
  • Publication number: 20020027939
    Abstract: Device to take in fumes and cool the roof (10) of electric furnaces. The device has a central aperture (11) into which an electrode can be inserted and a peripheral aperture (12) to take in and discharge the fumes. The device also has a first cooling system (13) for a central zone surrounding, and cooperating with, the central aperture (11), and a second system (15) to take in and convey the fumes. The first cooling system (13) includes a circular cyclone chamber (18) having a plurality of turns (19) able to cool the zone surrounding the central aperture (11).
    Type: Application
    Filed: August 27, 2001
    Publication date: March 7, 2002
    Inventors: Peter Tischenko, Angelico Della Negra, Milorad Pavlicevic, Alfredo Poloni
  • Patent number: 6327296
    Abstract: A cooled roof for electric arc furnaces (20) or ladle furnaces (29). The roof being used as a covering element and including a cooling system comprising tubes fed with cooling fluid. The roof including at least a central aperture (25) for the positioning and movement of the electrodes (30) and at least a peripheral aperture (14) for the aspiration and discharge of fumes. The aperture (14) being connected to intake systems. The roof including two single-block cooling structures, inner (1) and outer (12), consisting of respective bent tubes (15, 16) developing according to adjacent and superimposed rings or spirals. The inner (11) and outer (12) cooling structures being associated with one another at least in correspondence with the respective bases facing towards the inside of the furnace (20, 29). Between the inner cooling structure (11) and the outer cooling structure (12) there being defined an annular interspace (13) in which the fumes circulate in an annular direction and slow down.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: December 4, 2001
    Assignee: Danieli & C. Officine Meccaniche SpA
    Inventors: Alfredo Poloni, Milorad Pavlicevic, Gianni Gensini, Peter Tishchenko, Angelico Della Negra
  • Patent number: 6246712
    Abstract: An arc furnace which includes a shell with a hearth, a roof for the shell, the roof including a plurality of segments which are substantially electrically isolated from each other and from the shell, an electrode and a refractory section on the roof, and wherein the refractory section is at least partly electrically conductive.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: June 12, 2001
    Inventors: Rodney Murison Whyte, Edwin Harm Roos, Andrew Bryan Johnston, Jan Abraham Ferreira, Dirk Renaat Gabriel Faveere, Anthony Wayne Wewege
  • Patent number: 6219371
    Abstract: System to plug the roof of an electric arc furnace having a main chamber or melting volume arranged below the roof and at least one electrode introduced into the main chamber, the system comprising an upper element or auxiliary roof element arranged on the top of the roof and shaped so as to define an inner chamber and at least a central aperture through which the electrode can be moved, the auxiliary roof element consisting of a plurality of pipes inside which a cooling fluid circulates under pressure.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: April 17, 2001
    Assignee: Danieli & C. Officine Meccaniche SpA
    Inventors: Milorad Pavlicevic, Peter Tishchenko, Alfredo Poloni, Angelico Della Negra
  • 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: 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: 6084902
    Abstract: An electric arc furnace includes a substantially cylindrically configured melting vessel having an upper shell defining a top opening. A water-cooled roof assembly is supported by the upper shell and positioned over the top opening and can be removed from the top opening for permitting the charging of scrap into the melting vessel. The water-cooled roof assembly includes an annular configured, water-cooled outer roof panel defining a central opening. An annular configured, water-cooled inner roof panel is positioned within the central opening of the outer roof panel and is removably mounted on the outer roof panel. The inner roof panel includes a central opening that removably mounts a central refractory. At least one electrode is mounted in the central refractory and extends into the melting vessel.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: July 4, 2000
    Assignee: Fuchs Systems, Inc.
    Inventor: Christopher Hawk
  • Patent number: 6036915
    Abstract: A water-cooled multipart hood for metallurgical vessels, particularly pouring ladles, with cooling tubes arranged welded tube against tube and/or with gaps between the tubes, with an opening arranged in the cover of the hood for inserting a refractory core piece for guiding electrodes therethrough, and with openings for discharging flue gases. The water-cooled ladle hood further includes a lower outer hood and a lower inner hood with at least three gas exhaust openings and a gas conducting pipe arranged in the lower outer hood, wherein an upper hood with at least three gas exhaust openings, a gas conducting pipe and an opening is arranged in the lower inner hood.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: March 14, 2000
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Klaus-Jurgen Kuhne, Manfred Schubert
  • 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: 5999558
    Abstract: Spray cooled roof assembly for a metallurgical vessel, e.g. an electric arc furnace, comprising two spray cooled components, one of which covers a major portion of the furnace, and the other component of the roof assembly having an integral spray cooled extension for the removal of heated gases from the furnace.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: December 7, 1999
    Assignee: Ucar Carbon Technology Corporation
    Inventors: Frank Henry Miner, Jr., Mark Thomas Arthur
  • Patent number: 5936995
    Abstract: An electric arc furnace includes a melting vessel having a top opening and an inside wall surface. A removable roof is positioned over the top opening and can be removed for permitting the charging of scrap into the melting vessel. An electrode extends through the roof into the melting vessel. A slag door portion defines a slag discharge opening discharged from the melting furnace. An arcuate configured water-cooled panel includes opposing upper and lower ends and opposing side ends. This water-cooled panel is mounted in the melting vessel above the slag door portion so that the lower end is angled inwardly away from an adjacent inside surface of the melting vessel. The side ends curve toward the adjacent inside surface of the melting vessel to minimize any arcing between the opposing side ends and the electrodes, and to avoid damage from scrap charging. The water-cooled panel forms a scrap free area adjacent to slag door portion.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: August 10, 1999
    Assignee: Fuchs Systems, Inc.
    Inventors: Terry J. Sullivan, Manfred Haissig
  • Patent number: 5933445
    Abstract: Cooling system for cathodes, or electrodes, (11) in Direct Current electric arc furnaces, the cathodes (11) comprising a lower consumable graphite part (11a), from which the electric arc is sparked, associated at the upper part with a hollow metallic part (11b) by means of a joint (13), inside the metallic part (11b) there being included a closed cooling circuit (19) with water or other similar cooling fluid, defining an area of evaporation (17) arranged substantially in cooperation with the lower end of the metallic part (11b) and an area of condensation (18) arranged in cooperation with a desired upper area of the metallic part (11b), the area of condensation (18) cooperating with a heat exchanger (15) associated with the outer wall of the metallic part (11b), there also being included an ascending channel (14) for the steam (19a) from the evaporation area (17) to the area of condensation (18) and at least a descending channel (16) whereby the condensation descends, under force of gravity, from the area of
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: August 3, 1999
    Assignee: Danieli & C. Officine Meccaniche SpA
    Inventors: Milorad Pavlicevic, Alfredo Poloni, Gianni Gensini, Nuredin Kapaj
  • Patent number: 5923697
    Abstract: Device to cool the roof (10) in electric arc furnaces, of the type comprising a plurality of contiguous panels (27) disposed to cover at least a substantial part of the inner circumferential periphery of the roof (10), each of the panels (27) consisting of at least one pipe (11) wherein cooling fluids circulate, the roof (10) having at least one central aperture (35) to insert, position and move the electrodes (28) and at least one peripheral aperture, or fourth hole (16) to vent the fumes from inside the furnace, each cooled panel (27) covering its own defined arc of the inner circumferential ring of the roof (10) and comprising a spiral-shaped cooling pipe (11), the coils (15) of the spiral lying on respective vertical planes disposed substantially radially with respect to the center of the roof (10), the coils (15) defining a first outer layer (17) and a second inner layer (18) of pipes (11), the first outer layer (17) and second inner layer (18) being separated by a hollow space (19) lying on a plane suit
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: July 13, 1999
    Assignee: Danieli & C. Officine Meccaniche SPA
    Inventors: Milorad Pavlicevic, Peter Tishchenko, Alfredo Poloni, Angelico Della Negra
  • Patent number: 5887017
    Abstract: Spray cooled roof for a metallurgical furnace in the form of an assembly of separate hollow metal sections, each of which has a separate spray cooling system.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: March 23, 1999
    Assignee: UCAR Carbon Technology Corporation
    Inventors: Mark Thomas Arthur, Eric Bellwood
  • 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: 5648981
    Abstract: Two component spray cooled roof for electric furnaces to accommodate off-center electrode positions.
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: July 15, 1997
    Assignee: UCAR Carbon Technology Corporation
    Inventors: Frank Henry Miner, Jr., Mark Thomas Arthur
  • 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: 5444734
    Abstract: A combination of a spray cooled roof having a central opening, a support member and mast post wherein the roof is provided with an engagement which are detachably engaged to the corresponding engagement affixed to a support arm assembly which extends over a closed part of the roof. The support member is coupled to the mast post which raises, lowers and laterally moves the roof.
    Type: Grant
    Filed: February 18, 1993
    Date of Patent: August 22, 1995
    Assignee: UCAR Carbon Technology Corporation
    Inventors: Mark T. Arthur, Frank H. Miner, Jr.
  • Patent number: 5410565
    Abstract: The furnace includes a vessel closed by a floating roof, and a sealing means mechanism between the roof and the vessel. The sealing mechanism includes two joint surfaces, one of which is arranged on the peripheral edge portion of the roof whereas the other is arranged on the peripheral edge portion of the vessel. The first surface is substantially toric and the second surface substantially frustoconical. The joint surfaces permit the centering of the roof relative to the axis of the vessel. The peripheral edge portion of the vessel is provided with a coping element on which one of the joint surfaces is arranged.
    Type: Grant
    Filed: June 24, 1993
    Date of Patent: April 25, 1995
    Assignee: Unimetal Societe Francaise des Aciers Longs
    Inventors: Jacques Blum, Francois Heckel, Jacques Le Goff, Daniel Pernet, Dominique Rocchi
  • Patent number: 5327453
    Abstract: A preformed assembly is provided for the replacement of a thermally stressed portion of a unitary water cooled closure element, e.g. made of plain carbon steel, of a furnace system which includes a steel frame to which is pre-welded a copper covering plate, the steel frame being welded into a closely fitting cut-out in the closure element, e.g. a furnace roof or furnace shell.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: July 5, 1994
    Assignee: Ucar Caron Technology Corporation
    Inventors: Mark T. Arthur, Gordon R. Roberts
  • Patent number: 5289495
    Abstract: A roof structure for an electric arc smelting furnace includes a spider frame for supporting a plurality of independent removable coolant coil sections. An inner coil section is generally annular in shape and includes a coolant pipe which spirals completely around a central opening in the roof structure. An intermediate coil section is also generally annular in shape, but includes a coolant pipe which extends around the circumference of the inner section, reverses itself around the circumference of the first pipe of the intermediate section, and then reverses itself once again around the circumference of the second coolant pipe of the intermediate section, to form a generally serpentine pattern. A plurality of semi-annular outer coil sections are supported radially outwardly from the intermediate coil section. Each outer section includes a first pipe located generally centrally within the semi-annular section and extending from end to end.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: February 22, 1994
    Assignee: J. T. Cullen Co., Inc.
    Inventor: Eric N. Johnson
  • 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: 5227119
    Abstract: A spray-cooled furnace cover or roof from which the coolant is removed by gravity flow without the use of any pumps. The roof has lower coolant consumption than roofs requiring Venturi pumps to remove water.
    Type: Grant
    Filed: March 24, 1992
    Date of Patent: July 13, 1993
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Albert J. Zalner, Otto H. Metelmann
  • 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
  • Patent number: 5115184
    Abstract: A cover for a vessel handling heated substances, such as a furnace, in which the cover comprises an outer segment defining an opening in which a removable inner cover segment (delta) is seated and wherein said inner cover segment comprises spaced apart walls defining an enclosed space that contains coolant spray means adapted for spraying coolant onto the wall that is closest to the interior of the vessel.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: May 19, 1992
    Assignee: Ucar Carbon Technology Corporation
    Inventors: Mark T. Arthur, Frank H. Miner, Jr.
  • Patent number: 5084090
    Abstract: In the particular embodiments described in the specification, a vacuum furnace includes a conveying arrangement for holding four solid metal members with their end faces in closely-spaced relation and an energy beam gun directs energy to the adjacent faces to melt the metal. Metal ejected from the heated surfaces by explosive vaporization of inclusions in the metal is trapped by the adjacent surfaces of the other metal members.
    Type: Grant
    Filed: July 19, 1990
    Date of Patent: January 28, 1992
    Assignee: Axel Johnson Metals, Inc.
    Inventor: Howard R. Harker
  • Patent number: 4979896
    Abstract: A cooling device provided in a thermal analyzer to cool a heating furnace by heat exchange between a cooling medium and the heating furnace based on direct and uniform gas-to-solid contact, and constructed to facilitate replacement of a sample in the cooled furnace. The cooling device includes a jacket surrounding the heating furnace to define a closed annular space, an inlet formed to introduce cooling medium into the closed space, and an outlet formed to discharge the introduced cooling medium from the closed space. Cooling of the furnace is carried out due to the heat exchange between the cooling medium and the heating surface in the closed space. A top portion of the heating furnace is not covered by the jacket, but is exposed to thereby facilitate the replacement of a sample through the exposed top portion of the heating furnace.
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: December 25, 1990
    Assignee: Seiko Instruments, Inc.
    Inventor: Ryoichi Kinoshita
  • Patent number: 4870655
    Abstract: An electric arc furnace includes a crucible having a metal shell for recovering precious metals from spent material. The shell includes a metal tap hole and a slag door positioned above and opposite the metal tap hole. A removable swinging roof is provided above the crucible together with a plurality of electrodes for heating the spent material. Also, a cooling band circumscribes the crucible for cooling the metal shell. Conveyors are provided for distributing the spent material at a plurality of points located between the electrodes and the wall of the crucible. The crucible is tilted to allow the removal of the slag and metal.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: September 26, 1989
    Inventor: Vincent C. Ward