With Means Treating Or Handling Gases Exhausted By Treating Means Patents (Class 266/144)
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Publication number: 20090315230Abstract: Provided is a blast furnace gas burning facility with a simple configuration and capable of operating at nearly rated load while preventing a wet type dust collector from freezing under such conditions that the temperature of blast furnace gas does not exceed the freezing lower-limit temperature of the wet type dust collector, and also provided is a method for operating the blast furnace gas burning facility.Type: ApplicationFiled: July 4, 2008Publication date: December 24, 2009Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventor: Shoichi Harada
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Publication number: 20090308205Abstract: A direct smelting plant for producing molten metal from metalliferous feed material in a direct smelting process is disclosed. The plant includes a process controller for adjusting the volumetric flow rate of fuel gas supplied to a burner unit of at least one of the unit operations of the plant so as to at least meet selected requirements of the plant to operate the direct smelting process.Type: ApplicationFiled: April 24, 2007Publication date: December 17, 2009Inventor: Rodney James Dry
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Patent number: 7618581Abstract: Embodiments of the invention relate generally to systems used to measure mercury in gaseous emissions. In one aspect, the invention is directed to the use of silicon carbide as material for a thermal pyrolysis unit. In another aspect, at least one of silicon nitride, silicon boride, and/or boron nitride is used as material for a thermal pyrolysis unit. In another aspect, the invention is directed to an improved pyrolyzer design, in which a thermal pyrolysis unit comprises a tailpiece that allows water to be injected at the heated exit of the thermal pyrolysis unit. In another aspect, the invention is directed to the use of a coalescing filter in a scrubbing unit. In another aspect, the invention is directed to the use of a hydrophobic filter element in a scrubbing unit. One or more of these elements may be used in a conditioning module of a continuous emissions monitoring system, for example.Type: GrantFiled: September 2, 2004Date of Patent: November 17, 2009Assignee: Tekran Instruments CorporationInventors: Frank H. Schaedlich, Daniel R. Schneeberger
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Publication number: 20090065108Abstract: Processes and apparatus for batch annealing work pieces in a hydrogen atmosphere use pressure swing sorption to recover hydrogen from the annealing exhaust. In preferred embodiments, hydrogen for the batch annealing is generated by reforming and the recovery of hydrogen is integrated with the reforming operation.Type: ApplicationFiled: January 18, 2007Publication date: March 12, 2009Applicant: HYRADIX, INCInventors: Kishore J. Doshi, John R. Harness
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Publication number: 20090031854Abstract: An apparatus for the combustion of gas exiting from an electric arc furnace for the preheating of scraps entering the furnace itself foresees an insertion device of comburent substance into a preheating chamber or loading tunnel of the scrap metal having an inlet section of the scrap metal, a seal section to prevent an uncontrolled entrance of air in the tunnel, a heating section and an unloading section of the scrap metal in the furnace. Said insertion device of the comburent substance comprises one or more adjustable openings placed in the loading tunnel, and said apparatus comprises a device or a series of devices, also not equipped with autonomous movement, of mechanical seal nature placed in the insertion or inlet section of the scrap metal in the loading tunnel or preheating chamber.Type: ApplicationFiled: July 10, 2006Publication date: February 5, 2009Applicant: Techint Compagnia Tecnica Internazionale S.p.A.Inventors: Paolo Argenta, Silvio Reali, Claudio Lodati, Mauro Bianchi Ferri
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Publication number: 20090013828Abstract: Reduction process and relative plant for the production of metallic iron by means of the direct reduction of iron ore, in which a reduction shaft is connected to a source of reducing gas obtained from the gasification of coal. The process advantageously comprises a step in which a portion or all of the synthesis gas entering the plant circuit is processed to separate the methane from the rest of the components of said synthesis gas. The advantageous management of the extracted methane enables the entire reduction process to be optimized, making the efficiency of the process independent of the methane content in the original synthesis gas and making it possible to control the carbon content of the product more accurately and more easily.Type: ApplicationFiled: January 30, 2007Publication date: January 15, 2009Applicant: DANIELI & C. OFFICINE MECCANICHE S.P.A.Inventors: Alessandro Martinis, Andrea Tavano, Barbara Franco
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Patent number: 7452498Abstract: A pressure controlling apparatus controls a pressure in a container capable of storing a molten metal and supplying the molten metal to an outside using a pressure difference and includes: a supplying portion for supplying a compressed gas to be supplied to the container; a flow passage for supplying the compressed gas from the supplying portion to the container; a first switching valve, being inserted into the passage, capable of manually switching a first mode that enables the passage of the gas between the supplying portion side and the container side and a second mode that enables the passage of the gas between the container side and the outside; an exhausting portion for exhausting a gas from the container; and a second switching valve for switching a pressure applying mode for applying a pressure to the container and an exhausting mode for exhausting the gas from the container.Type: GrantFiled: December 1, 2003Date of Patent: November 18, 2008Assignee: Hoei Shokai Co., Ltd.Inventors: Hitoshi Mizuno, Narumi Ichikawa, Kazunori Suzuki, Koji Iyoda, Kenji Noguchi, Tsuyoshi Abe
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Publication number: 20080277842Abstract: An apparatus for manufacturing molten iron includes i) at least one fluidized-bed reduction reactor that reduces and plasticizes iron ore and converts the iron ore into reduced materials, ii) a melter-gasifier into which the reduced ore is charged and oxygen is injected, the melter-gasifier manufacturing molten iron, and iii) a reducing gas supply line that supplies a reducing gas discharged from the melter-gasifier to the fluidized-bed reduction reactor. The fluidized-bed reduction reactor includes a cyclone that is installed in the fluidized-bed reduction reactor to collect fine iron ore. A gas injector, which prevents the fine ore from adhering by injecting gas containing carbon, is connected to the cyclone.Type: ApplicationFiled: December 26, 2006Publication date: November 13, 2008Applicants: POSCO, VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH & COInventors: Myoung-Kyun Shin, Sang-Hyun Kim, Jun-Hyuk Lee, Kung-Won Nam
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Patent number: 7407621Abstract: A track-based mobile system for use with processes generating air-borne pollutants, for preventing contamination of the atmosphere. An enclosure for containing air-borne pollutants and a filtering system for removing the pollutants from the air are movable as a unit along a track for use at a plurality of worksites. The unit is openable at opposing portions facing the track so as to be able to pass over workpieces at the plurality of work sites. The filtering system includes intake tubes, and dampers to enable the selection of air-flow patterns within the enclosure.Type: GrantFiled: December 8, 2005Date of Patent: August 5, 2008Inventor: Michael Keith
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Patent number: 7381383Abstract: A treatment apparatus of the present invention includes a hermetic door 115b and a retort 115c as an interface for taking out a gaseous emission containing vaporized substances from an object to be treated which is being heated in a reduced pressure state in a second hermetic chamber 103 while maintaining conditions in the second hermetic chamber. When the retort 115c is inserted into a first opening 103b of the second hermetic chamber, the hermetic door 115b in an open state is shielded from the second hermetic chamber 103, whereby condensation of the gaseous emission at the hermetic door is prevented. Accordingly, condensates can be taken out while conditions such as temperature and pressure in the hermetic chamber are maintained without the treatment apparatus being stopped. The productivity of treatment is greatly improved by continuous operation of such a treatment apparatus.Type: GrantFiled: November 10, 2000Date of Patent: June 3, 2008Assignee: Hoei Shokai Co., Ltd.Inventors: Yoshiaki Yokoyama, Toru Kodama, Yasuo Mishima, Katuo Takamiya, Tsuyoshi Abe, Hitoshi Mizuno
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Patent number: 7232542Abstract: An improved blast furnace system for producing molten iron incorporating a preheater to heat the cold blast air used to temper the hot blast temperature is disclosed. The improved blast furnace system comprises a blast furnace, a hot blast main for conveying a supply of hot blast to the blast furnace, a plurality of stoves for heating a supply of cold blast and generating the hot blast, a cold blast main for conveying a supply of cold blast to the plurality of stoves, and at least one cold blast preheater for heating a portion of the cold blast, that has been diverted to the preheater, into heated air and the heated air is mixed with the hot blast to temper the hot blast temperature.Type: GrantFiled: April 5, 2004Date of Patent: June 19, 2007Assignee: Aker Kvaerner Metals, Inc.Inventors: Michael Friedrich, Robert D'Arrigo
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Patent number: 7201868Abstract: A direct smelting plant for producing molten metal from a metalliferous feed material is disclosed. The plant includes a fixed smelting vessel to hold a molten bath of metal and slag and a gas space above the bath. The plant also includes means for supplying solids and gas feed materials to the vessel and for tapping molten material from the vessel. The plant also includes at least two platforms for supporting plant operators at different heights of the vessel. The metal tapping means and the slag tapping means are located so as to be accessible by plant operators on a cast house platform and the end metal tapping means and the end slag tapping means are located to be accessible by plant operators on an end tap platform that is at a lower height than the cast house platform.Type: GrantFiled: April 12, 2004Date of Patent: April 10, 2007Assignee: Technological Resources Pty. LimitedInventors: Philip James Ions, Rodney James Dry
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Patent number: 7169207Abstract: The device and method of the present invention employs a column having a gas inlet in its lower part and a gas outlet in its upper part. Carbon particles are introduced into the column through a supply pipe. The supply pipe is movable so that by manipulating the height of the supply pipe in conjunction with discharging particulate matter through the column, the height of the bed of particulate matter in the column can be adjusted so that the retention time of the off gas in the particulate bed is constant. By maintaining a constant retention time of the off gas in the bed, complete conversion of the off gas is achieved.Type: GrantFiled: October 3, 2003Date of Patent: January 30, 2007Assignees: Alcoa Inc., Elkem ASAInventors: Olaf Trygve Vegge, Jon Christian Brinch
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Patent number: 7150777Abstract: A method and apparatus for the recovery of by product gases used in a vacuum metal treatment process or other gas treatments processes are disclosed. The present invention is normally carried out in a process chamber in the last stage of the process, after vacuum processing. The chamber is filled with an inert gas for cooling down the processed metal or other materials load at a certain predetermined pressure. The chamber is connected to a receiver having a pressure control device and a mechanism capable of changing its volume in order to keep constant pressure during the passage of gas from the chamber into the receiver. In addition, there is a cooling or heat transfer device to reduce the recovering gas temperature between the chamber and the receiver. The gas flow is driven by the excess pressure in the chamber during a first transfer period, or by the vacuum pumping system during the last gas transfer period.Type: GrantFiled: April 25, 2003Date of Patent: December 19, 2006Assignee: Ciateq A.C.Inventor: Miguel Angel Alcantara
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Patent number: 6833106Abstract: In order to design a blast furnace in a space and cost-saving manner, the invention provides for an especially compact blast furnace (10) having no hearth, wherein the burden is transported to the charging platform by vertical conveyers (20) and a compactly designed burdening (30) and pouring bay (50) are placed in the immediate proximity of said installation.Type: GrantFiled: March 19, 2002Date of Patent: December 21, 2004Assignee: SMS Schloemann-Siemag AktiengesellschaftInventors: Franz Reufer, Wilhelm Müller, Thomas Kaluza, Rainer Beermann
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Patent number: 6800113Abstract: The present invention refers to an equipment for feeding and distributing charge and fuel in furnaces of rectangular cross section, comprising movable feeding tubes to distribute along the longitudinal section and the cross section of the furnace, both a charge comprised of self-reducing agglomerates, ore, scrap or any other metallic material, and solid fuels of any kind.Type: GrantFiled: June 28, 2001Date of Patent: October 5, 2004Assignee: Startec Iron LLCInventors: Marcos de Albuquerque Contrucci, Pedro Henrique Carpinetti Costa
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Patent number: 6692688Abstract: A modular apparatus for the production of molten metal by self reduction of agglomerates of metal oxide or of prereduced metal, which may be iron. The apparatus includes a plurality of connected cells of identical size and construction. Each apparatus is connected to equipment for supplying the agglomerates for reduction or melting and refining within a reduction chamber or melting chamber, respectively, of each cell.Type: GrantFiled: March 20, 2001Date of Patent: February 17, 2004Assignee: Startec Iron, LLCInventors: Marcos de Albuquerque Contrucci, Pedro Henrique Carpinetti Costa, Edmar Saul Marcheze
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Patent number: 6682586Abstract: A process for separating and recovering a desired metal as metal oxide from raw material is provided. The process includes placing the raw material and a reductant in a container to form a reducing microclimate within the container. A housing having an oxidizing atmosphere is heated to maintain a temperature zone within the housing at a heating temperature sufficient to expose the raw material in the container to a reaction temperature. The container containing the raw material is conveyed through the temperature zone in the housing to expose the raw material and the reductant to the reaction temperature wherein the metal oxide is reduced to a gaseous metal that exits the container. Once outside the container, the gaseous metal is exposed to the oxidizing atmosphere of the temperature zone wherein the desired metal is oxidized to metal oxide and the metal oxide is collected. In preferred embodiments, the raw material is EAF dust and the desired metal is zinc.Type: GrantFiled: October 9, 2001Date of Patent: January 27, 2004Assignee: Heritage Environmental Services, LLC.Inventors: Scott W. Frame, Shannon R. Wilson, James E. Bratina
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Patent number: 6676889Abstract: A furnace exhaust remediation unit comprises an auxiliary combustion chamber with a gas burner assembly optimized for efficient and substantially complete combustion of pollutants, for example, waxy hydrocarbons emitted as binder/lubricant substances are driven off in sintering of green powdered-metal parts. The rate of flow of air and exhaust through the combustion chamber are controlled, permitting control of the average residence time of the emissions, ensuring substantially complete combustion. The burner is arranged such that it provides a high-energy exhaust stream directed tangentially into the combustion chamber, so that a spiral motion is provided to the combustible pollutants, improving mixing and heat transfer and thus ensuring efficient combustion of the vaporized hydrocarbon emissions. The system has a universal modular construction where a burn chamber module; a burn chamber extension module and slide gate damper assembly module are provided.Type: GrantFiled: May 10, 2002Date of Patent: January 13, 2004Assignee: Thermo-Stack L.L.C.Inventors: Hans M. Wenghoefer, John R. Martin, Jr., Sheridan A. Glen, James F. Corbett, Richard J. Geier
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Patent number: 6638471Abstract: The invention relates to a process vessel for vacuum processing liquid steel, comprising a lower part, a middle part and an upper part, and submersible pipes located on the lower part, whereby the process vessel is provided with a heating apparatus, a feed device, and a waste gas connection arranged at a right angle to the central axis of the vessel, and whereby the process vessel has an outer metal jacket and a refractory lining arranged at least in part in the interior of the vessel, according to which the metal jacket (19) of the upper part (15) of the vessel, including the waste gas connection (16), is provided with a water-cooling device (23) and is exposed directly on the interior side to the process conditions prevailing in the interior of the vessel (10).Type: GrantFiled: March 5, 2001Date of Patent: October 28, 2003Assignee: Technometal Gesellschaft für Metalltechnologie mbHInventors: F. Wagener, Arno Luven
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Patent number: 6506337Abstract: An arrangement of operating stations and equipment for the rapid preparation and transport of molten metal ladles and pouring tanks with covers to a pouring station of a pressure-pouring operation, and a method of providing the moving, placement and transport of the ladles and pouring tanks for the minimization of the loss of time between end of the first stage of pouring and initiation of the second stage of pouring.Type: GrantFiled: April 6, 2001Date of Patent: January 14, 2003Assignee: AMSTED Industries IncorporatedInventor: Christopher Z. Sieradzki
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Patent number: 6495092Abstract: A combustion apparatus comprises a pair or more than two pairs of burner groups. Each burner group comprises one regenerator per a plurality of burners. In each pair of burner groups, a first burner group and a second burner group are fired alternately and waste heat produced when the first burner group is fired is stored in a regenerator of the second burner group. The stored waste heat is utilized to preheat the combustion air of the second burner group when the second burner group is fired. Similarly, waste heat produced when the second burner group is fired is stored in a regenerator of the first burner group, and the stored waste heat is utilized to preheat the combustion air of the first burner group when the first burner group is fired.Type: GrantFiled: June 21, 2000Date of Patent: December 17, 2002Assignee: Sanken Sangyo Co., Ltd.Inventors: Katsumi Hazama, Keinosuke Masuki, Takayuki Inami, Miki Takai, Eiichi Kashima, Tetsuya Yamada
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Publication number: 20020139444Abstract: The present invention provides a grain-oriented electrical steel sheet excellent in film characteristics and iron loss characteristics, a process for producing the same and a decarburization annealing facility used for the process.Type: ApplicationFiled: March 27, 2002Publication date: October 3, 2002Applicant: Nippon Steel CorporationInventors: Kenji Kosuge, Kishio Mochinaga, Eiichi Nanba, Nobuo Tachibana, Shinya Ishii, Naoki Yagi
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Patent number: 6425934Abstract: A gas generator disposal method capable of disposing of large quantities of gas generators safely, efficiently and without contamination of environments, and a system therefor, the method comprising releasing an air bag deploying gas from an unused gas generator (X) by applying a YAG laser beam (R) to an igniter (P) of the gas generator (X).Type: GrantFiled: May 9, 2001Date of Patent: July 30, 2002Assignee: Nippon Kayaku Kabushiki KaishaInventors: Yasuhiro Aoki, Tetuo Saitou, Kenjiro Ikeda
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Patent number: 6399016Abstract: Direct smelting plant for producing molten metal from a metalliferous feed material induces a smelting vessel 11 to hold a molten metal and slag bath beneath a hot gas space. Solids injection lances 27 extend downwardly and inwardly through side walls of the vessel and hot oxidising gas is directed downwardly into the gas space by a central vertical gas injection lance 26. The plant layout is divided into four functional zones spaced circumferentially around vessel 11 and radiating outwardly from the vessel. Zone 1 contains an overhead hot gas delivery duct 31 supplying gas to lance 26 and an offgas duct 32; Zone 2 contains a forehearth 19 and forehearth tapping launder 34; Zone 3 contains slag notches 45 and slag launders 46; and Zone 4 contains a primary slag drain taphole and launder 48. This layout minimises the potential for interference between the transport of the hot gases, the metaliferous feed material, and the molten metal and slag.Type: GrantFiled: March 5, 2001Date of Patent: June 4, 2002Assignee: Technological Resources Pty. Ltd.Inventor: Andrew Charles Burrow
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Patent number: 6379420Abstract: In a method for producing a hot CO- and H2-containing reducing gas serving for the reduction of fine-grained metal ore, in particular iron ore, the reducing gas is formed in a gasification zone by a gasification of carbon carriers, in particular coal, taking place under the supply of oxygen and subsequently is cooled down to a reducing-gas temperature favorable to the reduction process. In order to produce a thermodynamically more stable reducing gas, the reducing gas by the addition of H2O and/or CO2—in order to prevent the Boudouard and heterogeneous water-gas reaction and a resultant heating of the reducing gas—is converted to a reducing gas that is thermodynamically more stable at the reducing-gas temperature.Type: GrantFiled: January 7, 1999Date of Patent: April 30, 2002Assignees: Voest-Alpine Industrieanlagenbau GmbH, Pohang Iron & Steel Co., Ltd., Research Institute of Industrial Science and Technology, Incorporated FoundationInventors: Leopold Werner Kepplinger, Johann Wurm, Herbert Mizelli, Walter Rainer Kastner, Günther Brunnbauer
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Publication number: 20020011133Abstract: A method of processing flue dust that contains one or more compounds from a first group of zinc, lead and cadmium compounds, and contains iron compounds, involves heating the flue dust to cause a substantial portion of one or more of the compounds of the first group to become gas-borne. A carbonaceous material is introduced to the remaining flue dust, and the flue dust/carbonaceous material mixture is heated to cause a substantial portion of the remaining compounds from the first group to become gas-borne while retaining a substantial portion of the iron in a non-gas-borne condition. The gas-borne compounds are separated from the non-gas-borne compounds.Type: ApplicationFiled: June 19, 2001Publication date: January 31, 2002Inventors: Deane A. Horne, Dennis W. Coolidge
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Patent number: 6315943Abstract: In a method of producing molten metal (8) from at least partially fine-particulate metal carriers in a melter gasifier (2) in which under supply of carbon-containing material and oxygen or an oxygen-containing gas under simultaneous formation of a reducing gas in a bed (11) formed of solid carbon carriers (4) the metal carriers are melted, the supplied fine-particulate metal carriers in order to avoid discharging thereof are charged to a high-temperature combustion zone (13) maintained by a combustion process and there are melted at least for the most part or completely, wherein the high-temperature combustion zone (13) is spatially isolated from the freeboard (12) of the melter gasifier (2) located above the bed (11) and extends into the bed (11), wherein the offgases formed in the high-temperature combustion zone (13) exit the same passing through at least a portion of the bed (11) and wherein furthermore the offgases are cooled in the bed (11) and are withdrawn from the melter gasifier (2) along with the rType: GrantFiled: June 15, 1999Date of Patent: November 13, 2001Assignees: Voest-Alpine Industrieanlagenbau GmbH, Pohang Iron & Steel Co., Ltd., Research Institute of Industrial Science & Technology, Incorporated FoundationInventor: Michael Nagl
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Patent number: 6264722Abstract: In a process for producing molten pig iron or steel preproducts from fine-particulate iron containing material in a meltdown gasifying zone of a melter gasifier, under the supply of carbon-containing material and oxygen-containing gas at the simultaneous formation of a reducing gas in a bed formed of solid carbon carriers, the iron-containing material is melted when passing the bed.Type: GrantFiled: January 20, 1998Date of Patent: July 24, 2001Assignees: Voest-Alpine, Pohang Iron & Steel Co. Ltd.Inventors: Werner Leopold Kepplinger, Felix Wallner, Johannes Schenk
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Patent number: 6251337Abstract: An apparatus and process for treating particulate material within a rotating retort in which gas is injected within the retort to fluidize the particulate material within the rotating retort. An auger is mounted within an axle supporting the retort for rotation and particulate material is injected by the auger within the retort. Gas may be exhausted from the retort through an annular chamber about the auger or from a hollow shaft of the auger. Gas may also be exhausted through a permeable wall of the retort.Type: GrantFiled: September 13, 1999Date of Patent: June 26, 2001Assignee: Acton Materials, Inc.Inventor: John E. Kane
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Patent number: 6241798Abstract: In order to be able to process in an economical manner different iron carriers in varying quantitative compositions, a plant for the production of iron melts (4), in particular steel melts, such as crude steel melts, is equipped with an electric are furnace vessel (1), a refining vessel (3) following upon the furnace vessel (1) via a weir (34) and including a bottom departing from the weir (34) in an at least partially downwardly inclined manner and an oxygen supply means (35, 36) as well as an iron melt tap (41) provided in its end region farther remote from the furnace vessel (1), a decanting vessel (2) following upon the furnace vessel (1) and having a common bottom (18) with the furnace vessel (1), said decanting vessel being provided with a slag tap (43) in its end region farther remote from the furnace vessel (1), a supply means (21) supplying liquid pig iron (20) and opening into the furnace vessel (1), a preheating shaft (5) supplying solid iron carries (7), said preheating shaft being arranged aType: GrantFiled: February 12, 1998Date of Patent: June 5, 2001Assignee: Voest-Alpine Industrieanlagenbau GmbHInventors: Stefan Dimitrov, Norbert Ramaseder, Wilfried Pirklbauer, Ernst Fritz, Heinz Müller
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Patent number: 6235236Abstract: An emission treatment apparatus for manufacturing plants including an inlet duct, a decantation chamber and an outlet duct. The emission treatment apparatus advantageously includes elements located inside of the decantation chamber for rendering uniform the flow of the emissions.Type: GrantFiled: October 14, 1999Date of Patent: May 22, 2001Assignee: ABB Ricerca SpAInventors: Gianfranco Velcich, Enrico Malfa, Francesca Nappini
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Patent number: 6224819Abstract: A fluidized bed reducing system for reducing a fine iron ore is disclosed, in which the structure of the fluidized bed reducing furnace is improved such that the coarse iron ore particles are distributed in the lower portion of the fluidized bed within the furnace and the fine iron ore particles are distributed in the upper portion of the fluidized bed. Thus, the average residence times of the particles in the furnace are adjusted differently for different ore sizes, so that the reducing efficiency can be improved, and that the residence time of the reducing gas in the furnace can be extended, thereby improving the degree of gas utilization.Type: GrantFiled: August 27, 1998Date of Patent: May 1, 2001Assignees: Pohang Iron & Steel Co., Ltd., Research Institute of Industrial Science & Technology, Voest-Alpine Industrieanlagenbau GmbHInventors: Yong Ha Kim, Il Ock Lee, Hang Goo Kim
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Patent number: 6210631Abstract: The invention relates to a reduction vessel (1) for the reduction of metal-oxide-bearing material, particularly of iron ore, by means of a reduction gas flowing countercurrently to the metal-oxide-bearing material, which reduction vessel (1) is provided with an inlet (5) for the metal-oxide-bearing material, an inlet (6) for the reduction gas, an outlet (7) for off-gas and an outlet (8) for reduced material, downstream of which outlet (8) a lower sealing leg (9) is connected, a supply line (10) for a first sealing gas being provided at the lower sealing leg (9) in order to seal the reduction vessel (1) against the environment, characterized in that at least one additional supply line (12) for an additional sealing gas is provided at the lower sealing leg (9) , the additional supply line (12) being located downstream of the supply line (10) for the first sealing gas, seen in the direction of flow of the reduced material (FIG. 1).Type: GrantFiled: December 4, 1998Date of Patent: April 3, 2001Assignee: Voest-Alpine Industrieanlagenbau GmbHInventor: Gerald Rosenfellner
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Patent number: 6071467Abstract: An apparatus and technique for collecting fumes from a metallurgical vessel such as a ladle are disclosed. The apparatus and technique are particularly well suited for collecting fumes during a cleanout operation of one or more discharge ports along the bottom of the vessel when the vessel is inverted on its side.Type: GrantFiled: March 13, 1998Date of Patent: June 6, 2000Assignee: USS/Kobe Steel CompanyInventors: John Paddock, Fred H. Vandersluis, David J. Diederich
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Patent number: 6030432Abstract: In a process for the reduction of fine ore by reducing gas in the fluidized bed method, the following characteristic features are realized in order to achieve a uniform and even degree of metallization at optimum utilization of the reducing gas and while minimizing the amount of reducing gas employed, that the fine ore is fractionated by aid of the reducing gas into at least two fractions having different grain size distributions, that each fraction is reduced by the reducing gas in a separate fluidized bed, wherein the reducing gas maintains a first fluidized bed containing the coarse-grain fraction and separates the fine-grain fraction from the same, is accelerated together with the fine-grain fraction, subsequently under pressure release forms a further fluidized bed, into which it is continuously injected in a radially symmetrical manner and from below, and wherein, furthermore, secondary reducing gas additionally is directly injected into the further fluidized bed in a radially symmetrical manner, and thType: GrantFiled: November 17, 1997Date of Patent: February 29, 2000Assignees: Voest-Alpine Industrieanlagenbau GmbH, Pohang Iron & Steel Co., Ltd., Research Institute of Industrial Science & Technology Incorporated FoundationInventors: Werner Leopold Kepplinger, Felix Wallner, Johannes-Leopold Schnek, Udo Gennari, Il-Ock Lee, Yong-Ha Kim, Gyu-Dae Park
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Patent number: 5997801Abstract: An apparatus and method for reclaiming metal chips formed while machining metal castings to their finished shape. The apparatus includes a stationary charging tube extending in a generally perpendicular direction from the charge well of a reverbratory furnace. The lower end of the charging tube is attached to a box-shaped structure which has an open bottom. The sides of the structure extend into a pool of molten metal contained in the charge well. A variable rate feeder provides a continuous supply of metal chips to the charging tube at a rate which is essentially the same as the rate at which the chips are being produced. The chips form a column within the charging tube which extends through the box-shaped structure and into the pool of molten metal. As the chips at the bottom of the column are melted, additional chips are added to the top, forcing the bottom of the column of chips into the pool of molten metal.Type: GrantFiled: January 5, 1998Date of Patent: December 7, 1999Assignee: Hayes Lemmerz International, Inc.Inventor: Kevin C. Newcomb
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Patent number: 5997609Abstract: In a process for producing sponge iron from particulate iron oxide-containing material, the iron oxide-containing material in a reduction zone is reduced to sponge iron by means of reducing gas and the gas forming during reduction is withdrawn as top gas. In order to provide for an efficient way of utilization of the top gas, the top gas is subjected to CO.sub.2 purification, CO.sub.2 -containing offgas separated in the purification is mixed with an oxygen-containing gas and is burnt, and the resulting thermal energy is supplied to a consumer.Type: GrantFiled: May 30, 1997Date of Patent: December 7, 1999Assignee: Voest-Alpine Industrieanlagenbau GmbHInventors: Jorg Diehl, Gerald Rosenfellner
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Patent number: 5902543Abstract: In a process for cooling an article by applying a liquid coolant to the surface (20) of the article (18) in the form of continuous jets (16) of coolant, the delivery rate of each jet of coolant is set in such a manner that the coolant striking the surface (20) evaporates completely. The jets (16) of coolant are applied by means of a plurality of jets (16) of coolant of small diameter (d) distributed over the surface (20) to be cooled. Each jet (16) of coolant has a diameter (d) of 20 to 200 .mu.m.Type: GrantFiled: October 21, 1997Date of Patent: May 11, 1999Assignee: Alusuisse Technology & Management Ltd.Inventors: Miroslaw Plata, Claude-Alain Rolle
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Patent number: 5885325Abstract: A two stage reaction for the production of steel from iron carbide is carried out in two separate but interrelated reactors. In the first reactor, iron, carbide, with slag formers, is fed into a feed end and the reaction is well-mixed by the vessel geometry, the stirring action below-surface injection of oxygen and iron carbide feed, and the evolution of gases from the liquid metal bath. The product, containing about 0.5-2% carbon, is fed into the second reactor where it is refined with subsurface-injected oxygen. The second reaction is autogenous, and the evolved carbon monoxide is fed to the first reactor where it is burned with oxygen in a foamy slag, which, with post-combustion burning in the slag of CO evolved in the first reactor, and with iron carbide preheating with the sensible heat of the off-gas from the first reaction, makes that reaction also essentially autogenous.Type: GrantFiled: August 18, 1997Date of Patent: March 23, 1999Assignee: USX CorporationInventors: Gordon H. Geiger, Asish K. Sinha, Achilles Vassilicos, Zhiyou Du
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Patent number: 5882579Abstract: A method and apparatus for producing direct reduced iron using a melter-gasifier and two reduction reactors. In the first reduction reactor, iron ore is prereduced using a reducing gas from a melter-gasifier. This prereduced iron ore is fed into the melter-gasifier to produce pig iron. A secondary reducing gas comprising hydrogen and carbon monoxide is withdrawn from the first reduction reactor and is reacted with water to produce carbon dioxide which is subsequently removed to produce a tertiary reducing gas that is used in the second reduction reactor to produce direct reduced iron from iron ore.Type: GrantFiled: July 17, 1997Date of Patent: March 16, 1999Assignee: Hylsa S.A. de C.V.Inventors: Ricardo Viramontes-Brown, Juan Antonio Villarreal-Trevino
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Patent number: 5785923Abstract: The apparatus of the present invention is a melter housing having a pretreat chamber heated with a feed material heater that is partially isolated from a melter chamber. The method of the present invention has the steps of introducing feed material into a pretreat chamber and heating the feed material to a softening temperature of the feed material, and passing the pretreated feed material to a melter chamber.Type: GrantFiled: March 8, 1996Date of Patent: July 28, 1998Assignee: Battelle Memorial InstituteInventors: Jeffrey E. Surma, Joseph M. Perez, Jr.
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Patent number: 5782188Abstract: A method and apparatus for incinerating waste material and in particular, for incinerating particulate material resulting from the shredding of vehicles. The particulate material is fed to one end of a rotary drum, and is subjected in the drum to pyrolitic incineration in the absence of air, to generate combustible gases and a solid residue. The combustion gases and the residue are discharged from the drum to a discharge hood, where the solid residue is separated from the gases. The gases are then passed through a condenser to cool the gases to a temperature below 212.degree. F. to thereby condense water vapor and higher boiling point hydrocarbon gases to produce hydrocarbon liquid.Type: GrantFiled: September 25, 1996Date of Patent: July 21, 1998Inventors: Marvin Evans, David H. Miller
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Patent number: 5733358Abstract: A two stage reaction for the production of steel from iron carbide is carried out in two separate but interrelated reactors. In the first reactor, iron carbide, with slag formers, is fed into a feed end and the reaction is well-mixed by the vessel geometry, the stirring action below-surface injection of oxygen and iron carbide feed, and the evolution of gases from the liquid metal bath. The product, containing about 0.5-2% carbon, is fed into the second reactor where it is refined with subsurface-injected oxygen. The second reaction is autogenous, and the evolved carbon monoxide is fed to the first reactor where it is burned with oxygen in a foamy slag, which, with post-combustion burning in the slag of CO evolved in the first reactor, and with iron carbide preheating with the sensible heat of the off-gas from the first reaction, makes that reaction also essentially autogenous.Type: GrantFiled: September 11, 1995Date of Patent: March 31, 1998Assignee: USX Corporation and Praxair Technology, Inc.Inventors: Gordon H. Geiger, Asish K. Sinha, Achilles Vassilicos, Zhiyou Du
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Patent number: 5705123Abstract: An apparatus and method for reclaiming metal chips formed while machining metal castings to their finished shape. The apparatus includes a stationary charging tube extending in a generally perpendicular direction from the charge well of a reverbratory furnace. The lower end of the charging tube is attached to a box-shaped structure which has an open bottom. The sides of the structure extend into a pool of molten metal contained in the charge well. A variable rate feeder provides a continuous supply of metal chips to the charging tube at a rate which is essentially the same as the rate at which the chips are being produced. The chips form a column within the charging tube which extends through the box-shaped structure and into the pool of molten metal. As the chips at the bottom of the column are melted, additional chips are added to the top, forcing the bottom of the column of chips into the pool of molten metal.Type: GrantFiled: December 15, 1994Date of Patent: January 6, 1998Assignee: Hayes Wheels International, Inc.Inventor: Kevin C. Newcomb
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Patent number: 5700420Abstract: A non-oxidizing heating method and apparatus in which a non-oxidizing gas of high temperature is continuously generated and supplied into a furnace by changing over a plurality of heat storage type heaters alternately while repeating an operation in which one heater stores heat and the other heater heats and blows the non-oxidizing gas. Since it is possible to heat by producing a completely non-oxidizing atmosphere within the furnace, the method and apparatus can be effectively utilized in furnaces which require heating in a non-oxidizing atmosphere, for example, various furnaces such as a ladle, tundish, etc. used in a field of steel manufacturing and continuous casting, and various furnaces used in a field of heating and heat treatment of metallic materials, and thus, it is effective to achieve reduction of operational cost, improvement of product quality, and improvement of product yield.Type: GrantFiled: April 8, 1996Date of Patent: December 23, 1997Assignee: Kawasaki Steel CorporationInventors: Tsuguhiko Nakagawa, Ryosuke Yamaguchi, Hisashi Osanai, Junichi Hasunuma, Takemi Yamamoto
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Patent number: 5673900Abstract: A process for recovering metal from scrap using a furnace having a bath chamber, a dry hearth chamber, an exhaust duct, and an incinerator for burning fumes from the dry hearth chamber is presented. The process includes conveying oxygen or oxygen enriched air to the incinerator in order to produce a desired oxygen concentration within the incinerator; introducing at least a major portion of the gases leaving the incinerator into the bath chamber; venting a minor portion of the gases from the bath chamber through the exhaust duct; and passing at least a major portion of the balance of the gases through the dry hearth chamber and recycling the balance of the gases to the incinerator, and wherein the concentration of oxygen present in one of the furnace and a duct which conveys hot combustion gases from the incinerator to the furnace is determined, and the volume of oxygen admitted to the incinerator is controlled in order to maintain the desired oxygen concentration within the incinerator.Type: GrantFiled: January 24, 1995Date of Patent: October 7, 1997Assignee: Benjamin Priest LimitedInventor: Eric Keith Riley
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Patent number: 5639418Abstract: A strip floater, heat treat furnace is provided with a plenum housing defining a plenum chamber which is positioned within a refractory lined furnace enclosure. The plenum chamber contains i) a fan housing holding a recirculation fan, ii) a header and pressure pad arrangement for heating and floating strip passing through the furnace, and iii) a recirculation duct for collecting and refreshing spent furnace atmosphere. The entire furnace atmosphere circulation loop from the fan housing through the header and pressure pads and back to the fan housing from the return duct after strip impingement is thus closed and sealed thereby preventing refractory fibre and foreign matter entrainment in the gas streams impinging the strip while improving the temperature control of the furnace atmosphere and strip.Type: GrantFiled: March 25, 1996Date of Patent: June 17, 1997Assignee: Surface Combustion, Inc.Inventors: Roy J. Greenwald, Larry L. Rozevink
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Patent number: RE37014Abstract: The combined installation comprises at least one metal production unit (II), including at least one, and typically a series of metal production or treatment units (1-6), and at least one air gas separation unit (III) including at least one outlet for at least one air gas (14-18), the units being supplied with compressed air with a low water vapor content by a common compressed air production unit (I), and with at least one of the gas outlets (14-18) from the separation unit (III) connected to at least one of the devices (1-6) of the production unit, to supply the latter with gas.Type: GrantFiled: July 21, 1998Date of Patent: January 16, 2001Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes GeorgesInventors: Alain Guillard, Marc Buffenoir, Daniel Deloche
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Patent number: RE36598Abstract: Fire-refined blister copper is produced from copper concentrate by a process comprising:A. melting and oxidizing the copper concentrate in a smelting furnace to produce molten matte and slag, and to separate one from the other;B. removing the molten matte from the smelting furnace;C. solidifying the molten matte;D. injecting the solidified matte into a converting furnace in which the matte is converted to blister copper and slag; andE. transfering the blister copper from the converting furnace to an anode furnace to produce fire-refined blister copper.After the fire-refined blister copper is produced in the anode furnace, it is typically transferred to an anode casting wheel on which it is converted to copper anodes suitable for subsequent electrolytic refining to cathode copper.Type: GrantFiled: September 11, 1997Date of Patent: March 7, 2000Assignee: Kennecott Holdings CorporationInventor: David B. George