| Patents for C21B 15 - Other processes for the manufacture of iron from iron compounds (585) |
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| 10/09/2001 | CA2216993C Method and apparatus for producing iron carbide |
| 09/26/2001 | CN1071795C Method for producing iron from solid iron carbide |
| 08/23/2001 | WO2001061058A1 Process for recovery of metals from metal-containing ores |
| 08/23/2001 | CA2400673A1 Process for recovery of metals from metal-containing ores |
| 08/21/2001 | US6277168 Method for direct metal making by microwave energy |
| 08/07/2001 | US6270741 Operation management method of iron carbide production process |
| 07/26/2001 | US20010009119 Chemical synthesis of monodisperse and magnetic alloy nanocrystal containing thin films |
| 07/24/2001 | US6264911 Production method of iron carbide |
| 07/17/2001 | US6261531 Classification a fine grained iron for producing iron carbide |
| 07/03/2001 | US6254662 Ultra-high density recording media. |
| 04/24/2001 | CA2200961C Process and apparatus for the manufacture of steel from iron carbide |
| 03/14/2001 | CN1063229C Method for recovering nickel hydrometallurgically from two different nickel mattes |
| 02/28/2001 | CN1285313A Equipment for producing triferric carbide |
| 02/14/2001 | CN1061945C Method for producing iron carbide |
| 01/23/2001 | CA2146732C Process for producing an iron melt |
| 09/20/2000 | EP1036762A1 Method of manufacturing iron carbide |
| 08/16/2000 | EP0793731B1 Process and apparatus for the manufacture of steel from iron carbide |
| 07/26/2000 | EP1022345A1 Production method of iron carbide |
| 07/12/2000 | EP1017619A1 Oxygen-fuel boost reformer process and apparatus |
| 06/06/2000 | US6071468 Apparatus for producing iron carbide |
| 05/31/2000 | EP1004544A1 Operation management method of iron carbide production process |
| 05/31/2000 | EP1004543A1 Production method of iron carbide |
| 05/16/2000 | US6063155 Fluidized bed process for the production of iron carbide |
| 05/10/2000 | CN1252454A Method for using low temperature rectification combinea blast furnace and direct reduction reactor |
| 05/03/2000 | EP0997693A2 Method for integrating a blast furnace and a direct reduction reactor using cryogenic rectification |
| 04/04/2000 | US6045602 Method for integrating a blast furnace and a direct reduction reactor using cryogenic rectification |
| 03/29/2000 | CN1249004A Production method of iron carbide |
| 03/29/2000 | CN1248959A Production method of iron carbide |
| 03/21/2000 | US6039790 Leaching using nickel sulfate and sulfuric acid, reducing to nickel metal, leaching an iron bearing solution after acidifying to form nickel sulfate, using formed nickel sulfate solution as leaching solution |
| 03/01/2000 | CN1246159A Producing iron from solid iron carbide |
| 01/26/2000 | CN1242755A Operation management method of iron carbide prodn. process |
| 01/12/2000 | CN1241166A Production method of iron carbide |
| 12/22/1999 | CN1047631C Process and appts. for mfg. of steel from iron carbide |
| 12/21/1999 | US6004373 Method for producing iron carbide |
| 12/15/1999 | EP0963946A1 Production method of iron carbide |
| 12/07/1999 | US5997596 Oxygen-fuel boost reformer process and apparatus |
| 10/20/1999 | CN2344410Y Washed coal fired negative pressure sintering furnace |
| 10/13/1999 | EP0949338A2 Fluidized bed process for the production of iron carbide |
| 10/06/1999 | EP0946756A1 Producing iron from solid iron carbide |
| 08/24/1999 | US5942198 Mixing flue dust with coal fines forming briquettes and adding to final furnace batch to form zinc containing dust; dissolving zinc containing dust forming intermediate solution; filtering, precipitating and filtering zinc oxide |
| 06/10/1999 | WO1999028235A1 Method of manufacturing iron carbide |
| 03/23/1999 | US5885325 Process and apparatus for the manufacture of steel |
| 03/11/1999 | WO1999011571A1 Oxygen-fuel boost reformer process and apparatus |
| 11/17/1998 | US5837031 Partial reduction of hematite with hydrogen in first reaction stage and complete reduction/carburization with methane in separate second stage; stoichiometric control |
| 09/22/1998 | CA2104086C Metallothermal reaction mixture |
| 09/09/1998 | CN1192785A Method for recovering nickel hydrometallurgically from two different nickel mattes |
| 09/03/1998 | WO1998038342A1 Production method of iron carbide |
| 09/03/1998 | WO1998038130A1 Operation management method of iron carbide production process |
| 09/03/1998 | WO1998038129A1 Production method of iron carbide |
| 09/03/1998 | WO1998038128A1 Production method of iron carbide |
| 09/03/1998 | CA2276576A1 Production method of iron carbide |
| 09/03/1998 | CA2276574A1 Production method of iron carbide |
| 09/03/1998 | CA2269913A1 Operation management method of iron carbide production process |
| 09/03/1998 | CA2263681A1 Production method of iron carbide |
| 07/16/1998 | CA2263742A1 Iron carbide manufacturing process and apparatus |
| 06/25/1998 | WO1998027232A1 Producing iron from solid iron carbide |
| 06/10/1998 | CN1184455A Process and equipment for producing iron carbide |
| 06/10/1998 | CN1038694C Process for producing an iron melt |
| 04/22/1998 | EP0837034A1 Process and equipment for producing iron carbide |
| 03/31/1998 | US5733357 Process for converting iron oxide to iron carbide employing internally generated carbon oxide as the carbiding agent |
| 01/14/1998 | CN1170440A Process and apparatus for manufacture of steel from iron carbide |
| 12/31/1997 | WO1997049637A1 Beneficiation of furnace dust for the recovery of chemical and metal values |
| 12/31/1997 | CA2259423A1 Beneficiation of furnace dust for the recovery of chemical and metal values |
| 11/04/1997 | US5683489 Improved efficiency, adsorption of sulfur on surface, suppression of precipitation of free carbon |
| 09/10/1997 | EP0793731A1 Process and apparatus for the manufacture of steel from iron carbide |
| 08/07/1997 | WO1997028283A1 Process for converting iron oxide to iron carbide |
| 08/07/1997 | DE19621412A1 Verfahren zum Umwandeln von Eisenoxid in Eisencarbid unter Einsatz eines intern erzeugten Kohlenoxids als Mittel zum Carbidisieren A process for converting iron oxide to iron carbide using a carbon oxide generated internally as a means for Carbidisieren |
| 02/27/1997 | WO1997007248A1 Method for recovering nickel hydrometallurgically from two different nickel mattes |
| 12/05/1996 | WO1996038379A1 Process and equipment for producing iron carbide |
| 10/23/1996 | CN1133822A Process for preparation of ferric chloride in aqueous solution |
| 09/03/1996 | US5552073 Ferromagnetic fine particles of ε iron carbide and method for producing the same |
| 07/31/1996 | EP0723935A1 Process for the preparation of an aqueous solution of iron III chloride |
| 07/27/1996 | CA2168073A1 Process for preparing a solution of ferric chloride in water |
| 07/21/1996 | CA2167358A1 Method of producing iron carbide |
| 06/27/1996 | WO1996019591A1 Process and apparatus for the manufacture of steel from iron carbide |
| 05/07/1996 | US5514203 Adding quicklime binder and coal dust to dehydrated sludge, granulation, charging to melting/gasification zone while increasing basicity of slag |
| 02/21/1996 | CN1117083A Process for producing an iron melt |
| 02/20/1996 | US5492879 Catalyst comprising finely divided metals and oxidized metals |
| 01/23/1996 | US5486225 Process for producing an alloy |
| 10/11/1995 | EP0676478A1 Process for producing an iron melt |
| 09/26/1995 | US5453297 Process for producing finely divided metals deposited on oxidized metals |
| 12/06/1994 | US5370726 Iron oxide and aluminum |
| 02/23/1994 | EP0583670A1 Metallothermic reaction mixture |
| 10/20/1993 | EP0344324B1 Process for producing particulate metal powder |
| 07/13/1993 | US5227032 Method for producing oxygen from lunar materials |
| 10/21/1992 | EP0509447A2 Thermite process for producing a metal or alloy |
| 10/06/1992 | US5152830 Loading mixture of metal oxide powders and reducing agent in layers having controlled concentrations so as to control amounts of heat generated in exothermic reaction, efficiency |
| 08/12/1992 | EP0498788A1 An arrangement for the thermal treatment of, and/or for passing a gas through, granular substances |
| 11/13/1991 | EP0220198B1 Preparing metal compounds by pyrolysis |
| 06/26/1990 | US4936909 Process for producing fine particulate metals |
| 04/04/1990 | EP0361349A2 Magnetic fine particles of epsilon' iron carbide |
| 12/06/1989 | EP0344324A1 Process for producing particulate metal powder |
| 06/01/1989 | WO1989004736A1 Process for producing particulate metal powder |
| 11/01/1988 | US4781580 Indirectly heated rotary tubular kiln |
| 08/30/1988 | CA1241200A1 Method of processing an iron-containing dust obtained in the preparation of iron or steel |
| 12/15/1987 | US4713223 Dissolving in acid; complexing impurities; precipitating iron |
| 05/06/1987 | EP0220198A1 Preparing metal compounds by pyrolysis. |
| 03/24/1987 | US4652307 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 |
| 01/14/1987 | CN85104999A Method of processing an iron-containing dust obtained in the preparation of iron of steel |
| 12/16/1986 | US4629500 Use of novel rotary tubular kiln |