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| Number | Title | Issue Date |
| 7198770 | Process for producing nickel carbonyl, nickel powder and use thereof A process for producing Ni(CO)4 from carbon monoxide and a source of nickel selected from the group consisting of elemental nickel, a nickel compound or mixtures thereof, provided the nickel compound is not nickel chloride per se or in admixture with a ni... | 04/03/2007 |
| 7121995 | Method for stabilization of lead smelter slag and matte This invention provides a method for stabilization of lead smelter slag and matte subject to acid and water leaching tests or leach conditions by addition of stabilizing agents into the smelter feed such that leaching of lead is inhibited to desired levels. The resu... | 10/17/2006 |
| 6855189 | Method for removing chrome and/or nickel from liquid slags In a method for removing chromium oxide and nickel oxide, and combinations thereof, from liquid slags or slag mixtures, in which the liquid slag is A charged onto a metal bath, in particular an iron bath, and reduced by feeding carbon or carbon carriers, the carbon ... | 02/15/2005 |
| 6409793 | Method for processing steel slags containing chromium A method for processing steel slags and optionally iron carriers such as, e.g., electric furnace slags, converter slags, dusts derived from steel production, mill scale or secondary metallurgical residues, in which the molten steel slags or iron carriers ... | 06/25/2002 |
| 6402803 | Ultrafine nickel powder Provided is an ultrafine nickel powder suitable for a laminated ceramic capacitor electrode material. According to the ultrafine nickel powder, cracks and/or delamination are not liable to generate in the process for producing a ceramic capacitor, and its... | 06/11/2002 |
| 6391084 | Metal nickel powder The present invention provide metallic nickel powder in which the occurrence of delaminatoin can be prevented by providing superior sintering propreties in production processes for multilayer ceramic capacitors and by providind superior dispersion charact... | 05/21/2002 |
| 6379426 | Fluidized bed reduction of laterite fines with reducing gases generated in situ The present invention is concerned with a method for the pre-reduction of laterite fines in a reactor, preferably a fluidized bed, with reducing gases generated in situ by adding a reducing agent such as a carbonaceous material in the fluidized bed chambe... | 04/30/2002 |
| 6261340 | Method for transforming slag derived from non-iron metallurgy In a method of converting slags derived from nonferrous metallurgy, in particular primary and secondary Ni and Cu metallurgical slags, while recovering and/or enriching the nonferrous metals and forming synthetic puzzolans, the molten oxidic slags are red... | 07/17/2001 |
| 6235077 | Process for production of nickel powder Chlorine gas from a supply nozzle is mixed with the vapor of nickel chloride and the mixed gas is supplied from a supply nozzle into a hydrogen gas atmosphere in a reduction reactor at a reduction temperature of 900 to 1100° C. The volume of chlorine gas... | 05/22/2001 |
| 6214087 | Treatment of iron oxide agglomerates before introduction into furnace A method for producing solid metal product is disclosed including the steps of providing carbon and metal bearing compounds in compacts, coating the compacts with treatment materials, encapsulating the compacts with carbonaceous containing materials to fo... | 04/10/2001 |
| 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 |
| 5776226 | Method for working up refuse or metal-oxide-containing refuse incineration residues A method for working up refuse or metal-oxide-containing refuse incineration residues or metallurgical residues includes an at least partial oxidation in a meltdown oxidizing reactor followed by a two-stage reduction. The first reduction stage is effected... | 07/07/1998 |
| 5626646 | Method of recovering metals and producing a secondary slag from base metal smelter slag A method of recovering metals and producing a secondary slag from base metal smelter slag produced by a copper or nickel smelter includes mixing the smelter slag with at least one reducing agent selected from the group consisting of carbon and aluminum, s... | 05/06/1997 |
| 5607495 | Oxygen smelting of copper or nickel sulfides Copper and or nickel sulfide ore concentrates of high intrinsic value are oxygen smelted by introducing such concentrates via feeds (32) into a closed loop extraction circuit in which a molten sulphide carrier composition is forcibly circulated by an R-H ... | 03/04/1997 |
| 5565016 | Method for suspension smelting The invention relates to a method and an apparatus for the suspension smelting of suifidic, finely divided raw materials containing metals, such as copper, nickel and lead, by using oxygen enrichment. In this method into the suspension smelting furnace (1... | 10/15/1996 |
| 5447551 | Method and apparatus for the removal of hydrogen sulfide from a process gas stream An improved method and apparatus for forming metallized iron by direct reduction of particulate iron oxide is disclosed. Spent reducing gas is recycled from the reduction furnace through a cooler-scrubber and a catalyst-containing stoichiometric gas refor... | 09/05/1995 |
| 5443620 | Method for oxidizing pulverous fuel with two gases having different oxygen contents A method for oxidizing the pulverous fuel of a furnace, advantageously a flash smelting furnace, by means of a burner, so that the oxidation takes place mainly owing to an effective mixing of two different combustion gases, pulverous fuel and possibly an ... | 08/22/1995 |
| 5385600 | Method for beneficiating nickel sulfide concentrates and corresponding mixtures, unsuitable for smelting The invention relates to a method for fully beneficating nickel sulfide concentrates or other corresponding mixtures, unsuitable for smelting, by combining the use of both pyrometallurgical and hydrometallurgical processes, so that there are formed two se... | 01/31/1995 |
| 5364447 | Method of recycling hazardous waste A smelting process for blending hazardous and non-hazardous inorganic industrial wastes with carbon or aluminum reducing agents to simultaneously recover metal alloys (reducible metals), metal oxides (volatile reducible metals), carbon dioxide and man-mad... | 11/15/1994 |
| 5340378 | Method and apparatus for producing low sulfur metallized pellets An improved method and apparatus for forming metallized iron by direct reduction of particulate iron oxide is disclosed. Spent reducing gas is recycled from the reduction furnace through a cooler-scrubber and a catalyst-containing stoichiometric gas refor... | 08/23/1994 |
| 5316471 | Method and apparatus for mass transfer in multiple hearth funaces An apparatus for improving mass transfer in a multiple hearth furnace has a plurality of risers adjacent the furnace center shaft which are in fluid communication with a source of treatment fluid. The risers have radially extending branch pipes, each pipe... | 05/31/1994 |
| 5240495 | In situ formation of metal-ceramic oxide microstructures In situ formation of metal-ceramic oxide microstructures is carried out on a starting oxide phase containing at least a most noble metallic component (e.g., iron) and a least noble metallic component (e.g. manganese) and subjecting the starting oxide phas... | 08/31/1993 |
| 5178666 | Low temperature thermal upgrading of lateritic ores This invention relates to a thermal upgrading process whereby nickel-containing limonite or limonite/saprolite blends are pelletized with requisite amounts of solid carbon reductant and a sulfure-bearing concentrating agent. The pellets are fed to a react... | 01/12/1993 |
| 5047082 | Method for smelting reduction of Ni ore A method for smelting reduction of Ni ore comprises charging Ni ore and carbonaceous material into a converter type smelting reduction furnace having bottom-blow tuyeres and a top-blow lance, the smelting reduction furnace holding a molten metal, blowing ... | 09/10/1991 |
| 5017220 | Method for smelting reduction of Ni ore A method for smelting reduction of Ni ore comprises charging Ni ore, carbonaceous material and flux into a converter type smelting reduction furnace holding molten iron therein and controlling a post-combustion ratio [(H2 O+CO2)/(H | 05/21/1991 |
| 4976776 | Method for reduction of material containing metal oxide using a fluidized bed reactor and flame chamber A method and apparatus for producing, in a reactor, a suitable prereduced product for final reduction from material containing metal oxide. The material is preheated in a fluidized bed by means of hot gases from a subsequent prereduction stage. The hot ma... | 12/11/1990 |
| 4975116 | Method for production of metals of ferroalloys by direct reduction The present invention relates to a method for production of metals and/or ferro alloys by prereduction of particulate metal oxide co-current with a reducing gas. Reducing gas having a temperature between 650° and 1100° C. and metal oxide particles are s... | 12/04/1990 |
| 4857104 | Process for reduction smelting of materials containing base metals A process for reduction smelting of copper-, nickel- or cobalt-containing materials in which such a material, at least partly in oxidic form is heated or combusted in finely divided form in a neutral or oxidizing flame to provide superheated particles. Th... | 08/15/1989 |
| 4814004 | Non-ferrous metal recovery Metal values in non-ferrous metallugical slag are recovered by gently agitating the slag in contact with matte using stirring energy dissipation rates insufficient to emulsify slag in matte. These low agitation rates conserve energy by reducing cooling of... | 03/21/1989 |
| 4756748 | Processes for the smelting reduction of smeltable materials A process for the smelting reduction of oxide ores, in particular iron ores, employs a mixture of the finely divided ore with equally finely divided reductant, which in the case of iron ores preferably is a coal. The mixture is fed into the interior of a ... | 07/12/1988 |
| 4544141 | Process and apparatus for continuous converting of copper and non-ferrous mattes A continuous process and apparatus for converting non-ferrous mattes is disclosed. The process comprises feeding continuously or intermittently a liquid matte into a furnace while continuously blowing air, oxygen or oxygen-enriched air into the melt conta... | 10/01/1985 |
| 4518420 | Winning metal from ore Copper is won from chalcopyrite ore (copper/iron sulphide) containing Cu(II) and Fe(III), which respectively prefer square planar and octahedral co-ordination. A vaporized tetradentate (square-planar) Schiff base reagent is passed through a fluidized bed ... | 05/21/1985 |
| 4504309 | Process and apparatus for continuous converting of copper and non-ferrous mattes A continuous process and apparatus for converting non-ferrous mattes is disclosed. The process comprises feeding continuously or intermittently a liquid matte into a furnace while continuously blowing air, oxygen or oxygen-enriched air into the melt conta... | 03/12/1985 |
| 4490174 | Process for the preparation of a ferronickel concentrate A ferronickel concentrate is produced by reducing a lateritic ore comprising less than 1.5% w of nickel at a temperature of from 920° to 1120° C. with a CO/CO2 mixture in the presence of a S-compound, such as Na2 SO4 or ... | 12/25/1984 |
| 4470845 | Continuous process for copper smelting and converting in a single furnace by oxygen injection A process and apparatus for continuous copper smelting, slag conversion, and production of blister copper in the same furnace by enriched oxygen containing gas injection.... | 09/11/1984 |
| 4421556 | Method for decontamination of nickel-fluoride-coated nickel containing actinide-metal fluorides The invention is a process for decontaminating particulate nickel contaminated with actinide-metal fluorides. In one aspect, the invention comprises contacting nickel-fluoride-coated nickel with gaseous ammonia at a temperature effecting nickel-catalyzed ... | 12/20/1983 |
| 4415356 | Process for autogenous oxygen smelting of sulfide materials containing base metals An autogeneous smelting process for suldie materials using a roasted portion blended with unroasted material in the presence of a flux.... | 11/15/1983 |
| 4404027 | Method of recovering heavy metals In a method of recovering heavy metals from filter residues containing metal oxides, metal hydroxides or metal carbonates, the residues are dried and reduced during heat supply in the presence of carbon-containing reducing agents. The metal-containing fil... | 09/13/1983 |
| 4394164 | Process for removal of harmful impurities from metallurgical sulphide melts A process for the removal of harmful impurities, particularly arsenic, antimony, bismuth and lead, from metallurgical sulphide melts, in which the sulphide melt is sulphurated before conversion, during the slag-blowing stage or after it before the blister... | 07/19/1983 |
| 4388110 | Method for recovering the metal content of complex sulphidic metal raw materials The metal content of complex sulphidic metal raw material is recovered therefrom by means of an autogenous flame-smelting process, preferably carried out in a vortex, with an oxygen-containing gas. The raw materials are smelted in a furnace in the presenc... | 06/14/1983 |
