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| Number | Title | Issue Date |
| 7186368 | Method for producing an electrode that has a temperature-stabilized conductivity The invention relates to a method for the production of an electrode for use at high temperatures, in which an electrode green compact is formed from a ceramic slip. The slip is formed from at least one solid electrolyte material as well as a metal oxide powder. The... | 03/06/2007 |
| 6921497 | Composition of matter tailoring: system I The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character. ... | 07/26/2005 |
| 6193941 | Process for producing a metallurgical raw material from oil containing heavy metals Besides a synthesis gas, a metallurgical raw material is to be produced from an oil containing heavy metals. To do this, the oil is partially oxidized and the heavy metal-containing soot is separated and burnt and the heavy metals thus occurring as ash ca... | 02/27/2001 |
| 6068677 | Method for processing waste or waste fractions, in particular car shredder light fractions The method for processing waste or waste fractions, such as, for example, household refuse, car shredder light fractions or the like, provides for pyrolysis, gasification and/or combustion, whereupon the residues are melted under reducing conditions. The ... | 05/30/2000 |
| 5993511 | Process of preparing nickel cermet A nickel cermet containing a metal nickel phase and an yttria stabilized zirconia phase, is prepared by a process comprising: preparing a suspension of the zirconia in demineralized water; preparing a solution of a nickel salt in demineralized water; mixi... | 11/30/1999 |
| 5437705 | Device and process for the recovery of cadmium and nickel A process and device for recovering cadmium and nickel metals from Ni-Cd battery and processing scrap material containing nickel, cadmium, iron and other substances are disclosed. The process includes depositing the scrap material in a furnace and adding ... | 08/01/1995 |
| 5346563 | Method for removing sulfur from superalloy articles to improve their oxidation resistance Superalloy articles are made more oxidation resistant by a process which includes heat treating the article in the presence of foreign chemical species, at a temperature at which the foreign chemical species reacts with and modifies any oxide film present... | 09/13/1994 |
| 5344510 | Method for removing sulfur from superalloy articles to improve their oxidation resistance Superalloy articles are made more oxidation resistant by a process which includes heating the article in an environment having a reduced pressure of inert gas and a low partial pressure of oxygen to a temperature at which the sulfur in the article diffuse... | 09/06/1994 |
| 5336294 | Removal of contaminants from molten metals Particles or inclusions are removed from a molten alloy by contacting the molten alloy with a material selected from the group consisting of aluminium silicate, magnesium silicate, zirconium oxide or a mixture of alumina-calcia and alumina-magnesia.... | 08/09/1994 |
| 5261944 | Nickel cermet, and process for preparing it A nickel cermet contains 35-70% by weight of a metal nickel phase and 65-30% by weight of a zirconia phase stabilized in the cubic form with yttria, with, on X-ray diffraction analysis, said phases appearing as distinct and homogeneously distributed at a ... | 11/16/1993 |
| 5196048 | Process for preparing a vanadium-nickel-chromium master alloy A hydrogen battery alloy is prepared which is substantially free of inclusions of chromium by preparing a first precursor alloy or master alloy containing vanadium, nickel, and chromium using relatively equal amounts of vanadium and nickel and then adding... | 03/23/1993 |
| 5190577 | Replacement of argon with carbon dioxide in a reactor containing molten metal for the purpose of refining molten metal In a method for decarburizing metals and alloys, a two-gas component mixture consisting only of oxygen and carbon dioxide is introduced into molten metals or alloys at least during the first decarburization phase.... | 03/02/1993 |
| 5174812 | Separation and recovery of nickel and cobalt in ammoniacal systems A process for the separation and recovery of nickel from an ammoniacal ammonium carbonate liquor containing nickel II ions and cobalt III ions by liquid-liquid extraction where ammoniacal ammonium carbonate solutions are the only aqueous phases involved i... | 12/29/1992 |
| 5147619 | Nickel recovery using a fluidized bed process A process for the recovery of nickel catalyst metal from a top portion of a fluidized bed consists essentially of the steps of providing a sludge material including spent catalyst including recoverable catalyst metal in the form of particles which are fin... | 09/15/1992 |
| 5102449 | Inclusion decanting process for nickel-based superalloys and other metallic materials In a method of remelting metallic materials, particularly nickel-based superalloys, in which the melting operation is carried out in a cooled copper crucible under clean vacuum conditions by means of electromagnetic inductors, the magnetic field applied t... | 04/07/1992 |
| 4895201 | Oxidation resistant superalloys containing low sulfur levels According to this invention, the oxidation resistance of alumina scale forming nickel based superalloys is significantly improved by controlling the level of sulfur in the alloy composition. According to one preferred embodiment of the invention, the supe... | 01/23/1990 |
| 4828814 | Process for purification of solid material A process is disclosed for producing a solid material which, in some cases, may have a resultant purity of 99.999% or better which comprises contacting the solid material at a temperature approaching the melting point of the solid material with a purifyin... | 05/09/1989 |
| 4718939 | Recycling superalloy scrap by vapor phase zinc embrittlement A method of making superalloy scrap friable in order to allow greater recovery of metal values therein is disclosed whereby the scrap is treated with zinc vapor. After exposure to the zinc vapor, the metal scrap becomes friable so that it can be easily cr... | 01/12/1988 |
| 4717419 | Method for treating iron-bearing slags containing precious metals, particularly slags created in the smelting process of copper and nickel The present invention relates to a method for treating iron-bearing slags containing precious metals, particularly slags created in copper and nickel smelting processes, by reducing the slag so that by means of adding a possible sulphidizing agent, the co... | 01/05/1988 |
| 4708738 | Method for refining very small heats of molten metal A steel refining vessel having a defined relatively long and thin configuration, and a steel refining method, particularly suited for the refining of heats of steel weighing two tons or less while enabling excellent heat retention and gas-metal reactions ... | 11/24/1987 |
| 4657585 | Method for separating cobalt, nickel and the like from alloys Cobalt, nickel and/or radioactive cobalt are separated from an alloy containing elements belonging to the iron group or family in such a manner that the alloy is melted in a molten bath of tin, lead and/or an alloy thereof whose weight is more than ten ti... | 04/14/1987 |
| 4657586 | Submerged combustion in molten materials A process for heating a molten material by injecting oxygen and a fuel into a molten bath of the material at a bath temperature above the spontaneous combustion temperature of the fuel, at least a portion of the fuel forming a shroud around the oxygen, an... | 04/14/1987 |
| 4652307 | Refining and/or alloying of a 3 percent to 6 percent carbon iron, cobalt, or nickel on a molten silver surface at temperatures 1000° C ° C. producing an iron cobalt or nickel powder, or their alloys and a petroleum product An iron containing 3% to 6% carbon and small quantities of manganese, silicon, sulfur and phosphorus produced by the blast furnace, electric furnace, or other well-known furnace requires a relatively low temperature to convert to the molten state. This mo... | 03/24/1987 |
| 4466826 | Process for recovering metal values from alloy scraps A process for recovering metal values from Ni and Co based superalloy scraps containing Cr, W, and Mo is disclosed. The process is a multistep pyrometallurgical oxidation process wherein the metal is successively oxidized by oxygen, Fe2 O3... | 08/21/1984 |
| 4456479 | Vacuum purification of liquid metals Molten metals having a low vapor pressure, such as aluminum, are vacuum refined to remove metallic impurities employing a lifting gas to form a metal fall above a liquid metal surface; a vacuum above the metal surface is effective in conjunction with the ... | 06/26/1984 |
| 4435211 | Process of blowing high-oxygen gases into a molten bath which contains non-ferrous metals The gases are injected through double-tube nozzles which extend through the wall of the reactor into the molten bath. A cooling protective fluid is injected through one tube of each double-tube nozzle. To reduce or avoid a wear of the double-tube nozzles ... | 03/06/1984 |
| 4431443 | Methods of vacuum arc melting A method is provided for substantially eliminating metal condensates on the walls of a vacuum arc melting vessel above a molten metal pool by the step of providing an atmosphere of non-condensible gas in the vessel above the molten metal pool during the m... | 02/14/1984 |
| 4401463 | Process for the recovery of metals from the scrap from nickel-cadmium electric storage batteries The present invention relates to a process for the recovery of metals from the scrap from nickel-cadmium electric storage batteries or other products which in addition to cadmium also contain organic substances and metallic components made of iron, nickel... | 08/30/1983 |
| 4389247 | Metal recovery process A process for recovering a metal in its elemental state from an oxide or salt of the metal comprising passing the metal oxide or salt and a reducing gas concurrently downward through a packed bed at a temperature above the melting point of the metal in it... | 06/21/1983 |
| 4336064 | Method of improving the performance of submerged oxygen injectors In the injection of oxygen through a refractory lined wall into a molten metal, for example, pig iron, the injected oxygen is surrounded by a stream of a protective fluid to diminish erosion of the refractory lining; the velocities of the oxygen and prote... | 06/22/1982 |
| 4334976 | Upgrading of residual oil This invention provides a process which involves visbreaking of a heavy hydrocarbon oil in the presence of a suspension of coal particles of 50-2000 micron size. The presence of the fine coal solids permits severe visbreaking conditions which increases th... | 06/15/1982 |
| 4290801 | Method and installation for the cooling of reduced material such as fine grained ore Method and apparatus for cooling hot reduced material output from a reduction furnace without exposing the material to oxygen in the air. A fluid-bed-cooler which receives the heated, reduced, material from the reduction furnace contains cooling pipes thr... | 09/22/1981 |
| 4234336 | Method of charging a crucible In inserting a bar of metal into a refractory crucible of a conventional vacuum furnace, a covering is placed over the leading end of the bar to reduce scoring of the crucible and the production of chips or particles of refractory material. The covering i... | 11/18/1980 |
| 4165979 | Flash smelting in confined space Use of a burner design featuring a tunnel of high length to diameter ratio enables the flash-smelting of sulfides to be carried out in a much more confined space than heretofore possible.... | 08/28/1979 |
| 4138249 | Process for recovering valuable metals from superalloy scrap Disclosed is a method for recovering valuable metals from scrap including the steps of melting the initial scrap feed, carburizing the melt, solidifying the carburized melt, and recovering the valuable metals from the resulting material by ammoniacal leac... | 02/06/1979 |
| 4113469 | Refining molten metal A method is provided for refining molten metal containing an impurity which is oxidizable in preference to one or more selected constituent elements of the metal and which forms a gaseous oxide, the method comprising injecting oxygen and a diluent gas int... | 09/12/1978 |
| 4094666 | Method for refining molten iron and steels A molten iron and steel is refined by feeding a compressed and deformed composite clad obtained by clading a core material of at least one of metallic calcium, metallic magnesium, calcium base alloys and magnesium base alloys with a sheath of iron, into t... | 06/13/1978 |
| 4049470 | Refining nickel base superalloys A process for producing a low iron nickel base superalloy having a very low selenium content. The process includes the steps of: preparing a superalloy melt containing, by weight, at least 60% nickel, no more than 1% iron, and more than 0.0004% selenium; ... | 09/20/1977 |
| 4045215 | Method of refining mattes containing nickel Nickel-containing mattes are desulphurized down to low sulphur levels (less than 1%) in a multi-stage process effected in a single converter vessel. In the first stage, an oxidizing gas is blown into the molten matte to reduce the sulphur level to about 4... | 08/30/1977 |
| 4029495 | Process for recovering a heavy metal catalyst component from a spent catalyst A supported catalyst contaminated with organic impurities or a mixture of such a catalyst and a flux is introduced into a rotary furnace, rocking furnace or gradient furnace and agitated and heated therein until sintered or transformed into a semi-melted ... | 06/14/1977 |
