| Patents for C22B 5 - General processes of reducing to metals (5,378) |
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| 05/08/1990 | US4923531 Deoxidation of titanium and similar metals using a deoxidant in a molten metal carrier |
| 05/02/1990 | EP0365680A1 A method for producing a reduced chromium-ore bearing powder. |
| 04/25/1990 | CN1041554A Process for making compositions of powdery refractory inorganic compounds and metals |
| 04/24/1990 | US4919396 Apparatus for smelting meltable substances, particularly ore concentrates |
| 04/18/1990 | EP0363552A1 Process for preparing metal particles |
| 04/10/1990 | US4915731 Metallurgical method and apparatus |
| 04/03/1990 | US4913734 Method for preparing ferrocarbon intermediate product for use in steel manufacture and furnace for realization thereof |
| 03/27/1990 | US4911637 Flame treatment method and apparatus |
| 03/14/1990 | CN1007134B Steam method for treating chromium slag |
| 03/06/1990 | US4906493 Method of preparing coatings of metal carbides and the like |
| 03/06/1990 | CA1266368A1 Process of reducing higher metal oxides to lower metal oxides |
| 02/06/1990 | US4898613 Gadolinium, terbium, dysprosium, holmium, erbium, thulium, and/or ytterbium; inexpensive |
| 01/23/1990 | US4895709 Low temperature pyrolysis |
| 01/23/1990 | US4895595 Oxidation and reduction zones |
| 01/16/1990 | US4893790 Apparatus for producing metal zirconium by the reduction of zirconium tetrachloride |
| 01/10/1990 | CN1038671A Method for production of metals or ferroalloys by direct reduction and column for treating particulate materials with gas |
| 01/09/1990 | CA1264252A1 Apparatus for producing ignitable solids-gas suspensions |
| 12/28/1989 | DE3920144A1 Orbital umgelagerte, monoatomare elemente, verfahrenzu ihrer herstellung und ihre weiterverarbeitung Orbital rearranged monoatomic, elements, verfahrenzu their production and their further processing |
| 12/27/1989 | EP0347668A2 Fine-grained, high-purity earth acid metal powders, process for their production and their use |
| 12/19/1989 | US4888052 Producing volatile metals |
| 12/13/1989 | CN1037929A Process for producing titanium,zirconium,chromium,samarium and neodymium metals from their oxides |
| 11/29/1989 | EP0343378A1 Process for producing metallic titanium, zirconium, chromium, samarium or neodymium from their oxides |
| 11/21/1989 | US4881972 Process for feeding heat energy into a molten metal bath |
| 11/08/1989 | CN1036990A Method and apparatus for reduction of meterial containing metal oxide |
| 11/07/1989 | US4878654 Method for cooling gases and/or vapors from non-ferrous metal treatment plants, and the relative apparatus |
| 10/31/1989 | US4877445 Reduction using reducing metal agent |
| 10/31/1989 | CA1262510A1 Smelting process and apparatus for recovering metals from non-ferrous metal, sulphide ores or concentrates |
| 10/19/1989 | DE3832843C1 Device for supplying a charging-oxygen mixture to a smelting furnace |
| 10/18/1989 | EP0337655A2 Method and apparatus for the manufacture of metallic filaments |
| 10/05/1989 | WO1989009290A1 Method and apparatus for reduction of material containing metal oxide |
| 10/05/1989 | DE3908715A1 Verfahren zur herstellung von pulverfoermigen hochschmelzenden anorganischen verbindungen und metallischen mischkoerpern Process for the preparation of pulverfoermigen refractory inorganic compounds and metallic mischkoerpern |
| 10/03/1989 | US4871147 Apparatus for the pyrometallurgical processing of fine-grained solids |
| 09/21/1989 | WO1989008724A1 Reduced chromium-ore bearing powder and method for producing the same |
| 09/13/1989 | CN1035529A Processing method for sulfide containing lead material |
| 09/08/1989 | WO1989008153A1 Process for implementing reducing pyrometallurgical processes with pellets |
| 09/05/1989 | US4863510 Reduction process for preparing copper, silver, and admixed silver-palladium metal particles |
| 08/24/1989 | WO1989007502A1 Pyrolysis of metal carbonyl |
| 08/23/1989 | EP0328677A1 PROCESS FOR MELT REDUCTION OF Cr STARTING MATERIAL AND MELT REDUCTION FURNACE |
| 08/23/1989 | EP0328613A1 Metallurgical controlling method |
| 08/23/1989 | EP0214268B1 A method for working-up waste products containing valuable metals |
| 08/16/1989 | CN1034759A Process for feeding heat energy into molten metal bath |
| 08/15/1989 | US4857104 Process for reduction smelting of materials containing base metals |
| 08/01/1989 | US4853030 Method and apparatus for the manufacture of metallic filaments |
| 07/26/1989 | CN1004879B Process for the smelting reduction of ores |
| 07/18/1989 | US4848754 Flash smelting furnace |
| 06/21/1989 | EP0302111A4 Method and furnace for making iron-carbon intermediate products for steel production. |
| 06/14/1989 | EP0319770A1 Process for recovering samarium and europium from the depleted bath mixture in the molten-salt-electrolysis preparation of mischmetal |
| 06/07/1989 | EP0318896A2 Method for smelting reduction of iron ore and apparatus therefor |
| 05/18/1989 | WO1989004379A1 Microwave irradiation of mineral ores and concentrates |
| 05/16/1989 | US4830665 Process and unit for preparing alloyed and non-alloyed reactive metals by reduction |
| 05/09/1989 | CA1253721A1 Neodymium alloys and process for preparing the same |
| 05/03/1989 | CN1004083B Method for producing rare earth-iron-boron permanent magnet |
| 05/02/1989 | US4826666 Method of preparing metal carbides and the like and precursors used in such method |
| 04/25/1989 | US4824362 Method for operation of flash smelting furnace |
| 04/19/1989 | EP0311978A1 Process for delivering heat to molten metal |
| 04/18/1989 | US4822410 Reclamation of metals by flash direct reduction |
| 04/12/1989 | CN1003865B Smelting of rare earth fine ore briquettes (or lumps) to prepare rare earth fine slag and niobium ferric phosphorate |
| 04/11/1989 | US4820339 Production of metal powders by reduction of metal salts in fused bath |
| 04/05/1989 | CN1032192A Method for preparation of ferrocarbon intermediate product for use in steel manufacture, and furnace for realization thereof |
| 03/29/1989 | CN1032035A Producing permanent magnet from rare earth chloride |
| 03/23/1989 | WO1989002477A1 Method of charging ore in melt-reduction |
| 03/08/1989 | EP0306184A1 Burner |
| 02/28/1989 | US4808216 Gas phase pyrolysis of diluted transition metal carbonyl in magnetic field |
| 02/28/1989 | CA1250427A1 Method of operating a metallurgical furnace and a metallurgical furnace apparatus |
| 02/23/1989 | WO1989001532A1 Process for melt reduction of cr starting material and melt reduction furnace |
| 02/23/1989 | WO1989001530A1 Metallurgical controlling method |
| 02/22/1989 | CN1031214A Technology of smelting low grade antimony oxide ore |
| 02/15/1989 | CN1003307B Process for direct reduction of briquets bound with high molecular substances |
| 02/08/1989 | EP0302111A1 Method and furnace for making iron-carbon intermediate products for steel production |
| 02/07/1989 | US4802919 Heating in reducing slag with carbonaceous material |
| 01/31/1989 | US4801329 Gold, silver, platinum group; oxidation; complex of iron, copper, vanadium or manganese as promoter |
| 01/26/1989 | WO1989000613A1 Magnesium production |
| 01/24/1989 | US4800069 Haliding a metal ferrite |
| 01/18/1989 | EP0299340A1 Method of removing heavy metal compounds from the filter dust from plants for the incineration of solid waste from plants for removing dust from smoke gases and from plants for gas purification |
| 01/18/1989 | CN1030444A Process for treatment of ores or concentrates of lead sulfuride and/or lead-zinc sulfuride |
| 01/17/1989 | US4798532 Flash smelting furnace |
| 01/11/1989 | EP0298698A1 Method for producing a metal from its halide |
| 01/04/1989 | EP0297167A1 Method and apparatus for producing molten metal from powder state ore |
| 12/28/1988 | CA1247373A Method and apparatus for processing sulphide concentrates and sulphide ores into raw metal |
| 12/14/1988 | CN88103911A Method and apparatus for carrying out thermochemical process |
| 12/06/1988 | US4789580 Process of reducing higher metal oxides to lower metal oxides |
| 12/06/1988 | US4789534 Pyroysis of metal amide |
| 12/06/1988 | CA1245863A1 Continuous reactive metal reduction using a salt seal |
| 12/01/1988 | WO1988009390A1 Process and device for implementing hot chemical processes |
| 11/23/1988 | EP0292469A1 Process and apparatus for high-temperature chemical operations |
| 11/22/1988 | US4786319 Proces for the production of rare earth metals and alloys |
| 11/15/1988 | CA1244656A1 Processes and appparatus for the smelting reduction of smeltable materials |
| 11/15/1988 | CA1244655A1 Method for recovering the valuable metal content of contaminated copper raw material |
| 11/09/1988 | EP0290177A1 Process for producing ultrafine metal powder |
| 11/08/1988 | US4783219 Blowing in oxygen while molten metal is being stirred |
| 11/01/1988 | US4781565 Apparatus for obtaining silicon from fluosilicic acid |
| 10/27/1988 | DE3811594A1 Method for processing lead-containing or lead- and zinc-containing sulphide ores and/or concentrates |
| 09/14/1988 | CN85106114B Smelting process for recovering metals from non-ferrous metal oxide ores or concentrates and/or from fine-grained non-ferrous metal sultide ores or concent rates,and apparatus for carrying out that pr |
| 09/13/1988 | US4770702 With iron and boron, magnetic |
| 09/13/1988 | CA1241821A1 Reuseable precious metal recovery cartridge |
| 09/06/1988 | US4769063 Method for producing rare earth alloy |
| 08/30/1988 | US4767455 Process for the preparation of pure alloys based on rare earths and transition metals by metallothermy |
| 08/30/1988 | US4767454 Calcining mixture of chromium and calcium oxides in oxygen; comminution and metallothermal reduction |
| 08/30/1988 | US4767450 Process for producing the rare earth alloy powders |
| 08/25/1988 | WO1988006190A1 Method and furnace for making iron-carbon intermediate products for steel production |