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| Number | Title | Issue Date |
| 7854883 | System for cooling shape-rolled rails A system for cooling a hot rail of rail steel to a fine perlitic or ferritic or perlitic/ferritic structure has a plurality of separate cooling modules with independently adjustable cooling parameters. The rail is guided downstream through the modules of the cooling... | 12/21/2010 |
| 7780906 | Method for controlling a molten metal bath bubbling in a metallurgical vessel and a device for carrying out said method A device for control of bubbling of a metal bath in a ladle or in another similar metallurgical vessel including a bottom injector linked to a source of supply of pressurized stirring gas to be injected with aid of a pipe provided with a facility for adjusting flow ... | 08/24/2010 |
| 7285257 | Method of removing tar-forming gases from CVD/CVI furnace effluent Method for removing tar-forming hydrocarbons from an effluent gas mixtures from Chemical Vapor Deposition or Chemical Vapor Infiltration processes. Method includes passing at elevated temperature effluent gas mixture containing hydrogen, methane, and high molecular ... | 10/23/2007 |
| 7204952 | Vacuum furnace for carburizing with hydrocarbons Vacuum carburizing of ferrous workpieces is performed at low pressure in a vacuum furnace using a carburizing hydrocarbon as the carburizing medium. The furnace is constructed to be generally transparent to the carburizing hydrocarbon so that cracking tends to occur... | 04/17/2007 |
| 7193189 | Systems and methods for monitoring or controlling the ratio of hydrogen to water vapor in heat metal treating atmospheres Systems and methods for monitoring a heat treating atmosphere derive from at least one sensor placed in situ in the atmosphere a process variable, which is indicative of the ratio of gaseous hydrogen H2 (g) to water vapor H2O (g) in the atmosph... | 03/20/2007 |
| 7109111 | Method of annealing metal layers A method of annealing a metal layer on a substrate in a chamber is provided. The method comprises positioning a substrate with a metal layer thereon in a chamber, removing atmospheric gases from the chamber, providing process gas to the chamber, and annealing the me... | 09/19/2006 |
| 6960238 | Method and installation for the indirect reduction of particulate oxide-containing ores In a process for the gas reduction of particulate oxide-containing ores, in particular iron-oxide-containing material, in the fluidized-bed process at a pressure of | 11/01/2005 |
| 6955730 | Method for enhancing the metallurigcal quality of products treated in a furnace The method and apparatus for enhancing the metallurgical quality of products treated in a furnace with several zones, wherein the temperature and the atmospheric conditions can be controlled. The applies to any type of product treated in a furnace, such as billets, ... | 10/18/2005 |
| 6929774 | Method and apparatus for heating and cooling substrates A method and apparatus for heating and cooling a substrate are provided. A chamber is provided that comprises a heating mechanism adapted to heat a substrate positioned proximate the heating mechanism, a cooling mechanism spaced from the heating mechanism and adapte... | 08/16/2005 |
| 6860919 | Recovery of precious metal from sulphide minerals by bioleaching A method of recovering a precious metal from a sulphide mineral slurry which contains the precious metal which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess of 21% oxygen by volume to the slurry, ... | 03/01/2005 |
| 6767504 | Heat treatment furnace In a heat treating method and furnace used in this method which can prevent disturbance of an atmosphere gas inside a heat chamber, and can prevent deterioration of the processing quality and efficiency of work, a control section 4 first operates a vacuum pum... | 07/27/2004 |
| 6744022 | Systems and methods for monitoring or controlling the ratio of hydrogen to water vapor in metal heat treating atmospheres Systems and methods for monitoring a heat treating atmosphere derive from at least one sensor placed in situ in the atmosphere a process variable, which is indicative of the ratio of gaseous hydrogen H2 (g) to water vapor H2O (g) in the atmosph... | 06/01/2004 |
| 6627145 | Gas-heated carburizing equipment A cell and an equipment for thermally processing steel parts under low pressure, including heating means formed of several radiant gas tubes distributed around a useful volume of a tight chamber, and control means provided with at least one mode of pulse ... | 09/30/2003 |
| 6544314 | Process and apparatus for automatically controlling slag foaming A metal alloy, such as steel, is manufactured in an electric arc furnace system equipped with at least one sensor, at least one a controller including a logic program and a variable valve in fluid communication with the furnace and a material source. The ... | 04/08/2003 |
| 6508976 | Apparatus for generating an artificial atmosphere for the heat treating of materials An apparatus and method for generating artificial atmospheres in a furnace for the heat treating of materials. The furnace includes a substantially isolated chamber having a discharge receiving orifice for accepting a bi-phasic cryogen into a hot/work zon... | 01/21/2003 |
| 6478846 | Method and device for injecting reducing agents in a shaft furnace The invention relates to a method for injecting reducing agents into a shaft furnace in which the reducing agent is transported within a pneumatic delivery stream to the shaft furnace according to the flowing steps; a) dividing the delivery stream into a ... | 11/12/2002 |
| 6383444 | Process for processing of reduction gas in a process for the reduction of gas A process to optimize the reduction process with a given quality of ore. The reduction gas 7 is analyzed by means of gas sensor 1 and is separated into two partial flows. The throughput of the partial flow which is oxidized is regulated by a regulation va... | 05/07/2002 |
| 6264716 | Process for controlling the stirring energy delivered by a gas flowing through a liquid A process for stirring molten steel in a container. In this process, argon gas is introduced into the container at a flow rate of from about 0.005 to about 0.2 cubic feet of argon per ton of molten steel per minute, the extent to which said container is c... | 07/24/2001 |
| 6054095 | Widthwise uniform cooling system for steel strip in continuous steel strip heat treatment step The present invention is to provide a cooling system for cooling a strip in a vertical path of a continuous strip heat-treating process in which cooling nozzles are arranged in a width direction of a strip on the surfaces of cooling headers arranged close... | 04/25/2000 |
| 5618032 | Shaft furnace for production of iron carbide Apparatus for the production of iron carbide in a shaft furnace, by reacting a carbon containing reducing gas as the process gas with particulate metal oxide material for an extended residence time at low temperature, including residence time and operatin... | 04/08/1997 |
| 5481247 | Blast furnace tuyere sensor system A blast furnace tuyere sensor system comprising a conditioning circuit including a D.C. power supply, a potentiometer for base loading circuit voltage, and a photosensitive resistor sensor which outputs an analog voltage signal proportional to the intensi... | 01/02/1996 |
| 5451246 | Process and device for heating and melting lumps of sponge iron For heating sponge iron to temperatures of about 850° C. without substantial oxidation losses, there are provided at least two separate preheating stages at different temperatures, to which the sponge iron is successively fed and in which the temperature... | 09/19/1995 |
| 5427604 | Alloy material addition method and apparatus for smelting and melting furnaces A method and apparatus for feeding alloy additive and burden materials to the burden in a vertical shaft furnace working volume generally by gravity-feeding the alloy additive to the furnace tuyere for entrainment in the blast media and transfer to the bu... | 06/27/1995 |
| 5385337 | Control system for a soft vacuum furnace A control arrangement is disclosed for a conventional, atmosphere heat treating furnace which is operated at high temperature and fitted with a vacuum pump to draw rough or soft vacuum levels when heating the work to heat treat temperatures. The control a... | 01/31/1995 |
| 5366205 | Carburization installation An installation for heat treatment or thermochemical treatment of steel permit instantaneous and permanent checking of the concentration of carbon at the surface of the steel, particularly in the course of the carbon enrichment of the surface zone of a wo... | 11/22/1994 |
| 5298089 | In-situ generation of heat treating atmospheres using non-cryogenically produced nitrogen A process for generating in-situ low-cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals and ceramics, sealing glass to metals, and sintering metal and ceramic powders in a continuous furnace... | 03/29/1994 |
| 5298090 | Atmospheres for heat treating non-ferrous metals and alloys A process for producing low-cost atmospheres suitable for annealing, brazing, and sintering non-ferrous metals and alloys from non-cryogenically produced nitrogen containing up to 5%, residual oxygen is disclosed. According to the process, suitable atmosp... | 03/29/1994 |
| 5254180 | Annealing of carbon steels in a pre-heated mixed ambients of nitrogen, oxygen, moisture and reducing gas An improved process for producing high-moisture containing nitrogen-based atmospheres suitable for oxide and decarburize annealing of carbon steels from non-cryogenically generated nitrogen is presented. These nitrogen-based atmospheres are produced by 1)... | 10/19/1993 |
| 5221513 | Apparatus and method for net shape finishing of gears An apparatus is disclosed for performing thermomechanical processing of gears in which precise control of the thermal, metallurgical and mechanical action during the forming process is maintained. The apparatus comprises an induction heating system which ... | 06/22/1993 |
| 5190600 | Method of monitoring a heat treatment with carbon penetration A probe (14) comprises a tubular electrical conductor (15) supported by a sleeve of insulating material (16). The two ends of the conductor are connected to couplings (23, 24) for the circulation of a reducing gas through the entire length of the conducto... | 03/02/1993 |
| 5129629 | Apparatus for feeding material into a molten stream An apparatus for adding a predetermined amount of inoculant into a molten metal stream having a conveyor means which accurately provides a desired amount of inoculant to a holding chamber mechanism which becomes pressurized and delivers the inoculant unde... | 07/14/1992 |
| 5110365 | Control of furnace cleaning for reflective ash using infrared imaging A method and apparatus for monitoring reflective ash deposited on a furnace wall to be cleaned, comprises an infrared video camera or other mechanism for taking an infrared image of the furnace wall. The image must include an area to be cleaned by the wat... | 05/05/1992 |
| 5096502 | Advanced water lance control system based on peak furnace wall emissivity A method and apparatus for controlling the operation of a water lance for water cleaning a furnace wall comprises a sensor or calculation equipment to derive the furnace wall emissivity and equipment that compares the emissivity to a programmed low setpoi... | 03/17/1992 |
| 5094695 | Furnace cleanliness monitor for high reflectivity ash A method and apparatus of initiating and terminating the cleaning of a furnace wall to remove reflective ash which been deposited thereon, comprises a video or infrared monitor which monitors the light being reflected from the furnace wall or the ratio of... | 03/10/1992 |
| 5069728 | Process for heat treating metals in a continuous oven under controlled atmosphere Heat treating metals by continuous longitudinal passage of metallic pieces in an elongated treating zone under controlled atmosphere having a high temperature upstream end where the controlled atmosphere comprises nitrogen and reducing chemical substances... | 12/03/1991 |
| 5064620 | Probe for measuring carbon flux A probe (14) comprises a tubular electrical conductor (15) supported by a sleeve of insulating material (16). The two ends of the conductor are connected to couplings (23, 24) for the circulation of a reducing gas through the entire length of the conducto... | 11/12/1991 |
| 5050848 | Apparatus for post combustion Process and apparatus for post combustion of reaction gases generated in a molten iron bath above the bath by means of at least one jet of oxidizing gases, whereby energy thereby produced is transferred to the bath and whereby the or each jet of oxidizing... | 09/24/1991 |
| 4931426 | Process for preparing crystalline ceramic superconductor materials by fluidized-bed calcination A process is provided for preparing crystalline ceramic superconductor materials, which comprises preparing a mixture of particulate crystalline ceramic superconductor precursors selected to form upon heat processing a crystalline ceramic superconductor m... | 06/05/1990 |
| 4807853 | Continuous furnace for gas carburizing and hardening A method of gas carburizing and hardening a steel article and a continuous furnace therefor. The method includes the steps of carburizing the article in a carburizing atmosphere at atmospheric pressure, heating the article in a vacuum for a predetermined ... | 02/28/1989 |
| 4805881 | Internal gas generator for heat treating furnace An internal gas generator in combination with a standard heat treat furnace is provided for producing either an endothermic product gas or a purge gas. The generator includes a reaction tube containing alternating packed beds of a highly active catalyst a... | 02/21/1989 |
