| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 07/10/1997 | WO1997024463A1 Device of three-stage fluidized bed furnace type for reducing fine iron ore |
| 07/10/1997 | WO1997024462A1 Method for injecting fine iron ore in smelting reducing process |
| 07/10/1997 | WO1997024414A1 Method for manufacturing coal agglomerates for use in direct iron smelting reducing furnace |
| 07/03/1997 | WO1997023656A1 Continuous smelting and refining of iron |
| 07/03/1997 | WO1997023655A1 2-stage fluidized bed furnace for pre-reducing fine iron ore and method for pre-reducing fine iron ore using the furnace |
| 07/02/1997 | EP0605535B1 Process for production of iron |
| 07/02/1997 | CN1035334C Method and apparatus for continuous producing iron-carbon alloy using iron carbide |
| 07/01/1997 | US5643354 High temperature oxygen production for ironmaking processes |
| 06/26/1997 | DE19648306A1 Treatment of shredded scrap light constituents in a melt |
| 06/25/1997 | CN1152619A Method for producing spongy iron and coproducing synthetic ammonia by reducing gas |
| 06/24/1997 | CA2058520C Hot dust recycling process and apparatus |
| 06/19/1997 | WO1997021840A1 Process for hot briqueting granular sponge iron |
| 06/18/1997 | CN1035196C Direct reduction technology for iron concentrate coal base and compound adhesive therewith |
| 06/17/1997 | US5639353 Apparatus for carbonizing material |
| 06/17/1997 | US5639293 Method and apparatus for production of iron from iron compounds |
| 06/12/1997 | WO1997020954A1 Simplified duplex processing of nickel ores and/or concentrates for the production of ferronickels, nickel irons and stainless steels |
| 06/12/1997 | DE19545985A1 Verfahren zum Heißbrikettieren von körnigem Eisenschwamm A method for hot briquetting of granular sponge iron |
| 06/11/1997 | EP0777758A1 Arrangement in a wall and a method of coating a wall |
| 06/11/1997 | EP0777751A1 Method and apparatus for electric steelmaking |
| 06/10/1997 | US5637133 Process for manufacturing sponge iron with low sulphur content |
| 05/22/1997 | WO1997018336A1 Process for the destruction of rubber-based materials and automobile fragmentation residues |
| 05/20/1997 | US5630862 Method of providing fuel for an iron making process |
| 05/15/1997 | WO1997017473A1 Duplex procedure for the production of metals and metal alloys from oxidic metal ores |
| 05/15/1997 | DE19543074A1 Direct reduction of iron and other metal oxide(s) |
| 05/14/1997 | EP0773300A1 Scrap melting method |
| 05/14/1997 | CN2254085Y Tank type furnace for producing sponge iron by direct reduction |
| 05/14/1997 | CN1149629A Producing method for directly reducing iron |
| 05/13/1997 | US5628958 Melt shop layout |
| 05/09/1997 | WO1997016573A1 Agglomeration of iron oxide waste materials |
| 05/09/1997 | WO1997016244A1 Method of returning a finely-divided solid extracted from a reactor vessel using a gas |
| 05/09/1997 | CA2236258A1 Agglomeration of iron oxide waste materials |
| 05/02/1997 | EP0770149A1 Process for producing hydraulic binders and/or alloys, e.g. ferrochromium or ferrovanadium |
| 04/30/1997 | CN1034742C Process for reduction of iron |
| 04/24/1997 | DE19539216A1 Utilisation of (hydro)carbon-containing wastes for reducing metals in waste |
| 04/17/1997 | WO1997013880A1 Method of producing molten crude iron or molten crude steel, and plant for carrying out the method |
| 04/17/1997 | WO1997013879A1 Method of directly reducing a particulate iron-containing material, and plant for carrying out the method |
| 04/17/1997 | WO1997013878A1 Method of directly reducing a particulate iron oxide-containing material and plant for carrying out the method |
| 04/17/1997 | CA2207416A1 Process for the direct reduction of particulate iron-oxide-containing material and plant for carrying out the process |
| 04/16/1997 | EP0768386A1 Method for lowering the melting point of the residual ash of coal |
| 04/10/1997 | WO1997012997A1 Scrap melting method |
| 04/10/1997 | DE19538591C1 Carburisation of sponge iron |
| 04/09/1997 | EP0767349A2 The use of nitrogen from an air separation plant in carbon dioxide removal from a feed gas to a further process |
| 04/09/1997 | EP0766750A1 Process and plant for recycling iron-containing residues from the steel and iron industry |
| 04/09/1997 | EP0766748A1 Direct reduction process for iron oxide-containing materials |
| 04/09/1997 | EP0766747A1 Direct reduction process for iron oxide-containing materials |
| 04/09/1997 | CN1147018A Process and apparatus for production of direct reduced iron |
| 04/09/1997 | CN1147017A Smelting reduction method with increased effectiveness |
| 04/08/1997 | US5618032 Apparatus using carbon-containing reducing gas; efficiency, high speed process |
| 04/03/1997 | WO1997012065A1 Method of melting tinned iron scrap |
| 03/20/1997 | DE19637180A1 Appts. for direct reduction of iron oxide particles |
| 03/18/1997 | US5611838 Supplying carriers and reducing agents into foamed slag; low energy |
| 03/14/1997 | CA2185248A1 Circulating fluidized bed direct reduction system |
| 03/12/1997 | EP0621855B1 Method for the recovery of zinc oxide |
| 03/11/1997 | CA2072572C Continuous production of iron-carbon alloy using iron carbide |
| 03/06/1997 | WO1997008347A1 Process for treating metal oxide fines |
| 03/05/1997 | CN1144275A Apparatus for producing molten pig iron by direct reduction |
| 03/04/1997 | US5607556 Method for coking coal |
| 02/27/1997 | WO1997007247A1 Process for producing liquid raw iron or liquid steel base products and sponge iron and plant for implementing it |
| 02/26/1997 | CN1143681A Method of reducing metal oxide in rotary hearth furnace heated by oxidizing flame |
| 02/26/1997 | CN1143680A Direct use of sulfur-bearing nickel concentrate in making Ni alloyed stainless steel |
| 02/26/1997 | CN1143679A High temperature oxygen production for ironmaking processes |
| 02/25/1997 | CA2069859C Plant comprising a shaft |
| 02/20/1997 | WO1997006281A1 Reducing iron oxides in rotary hearth furnace |
| 02/20/1997 | WO1997006280A1 Transportable apparatus for mill scale reduction |
| 02/19/1997 | CN1143391A Fluidized bed type reduction apparatus for iron ore particles and method for reducing iron ore particles |
| 02/18/1997 | US5603748 Process and apparatus for a direct reduction of iron oxide containing materials to form Fe3 C |
| 02/12/1997 | EP0757972A2 Plasma furnace |
| 02/12/1997 | CN1142845A Utilizing discarded carbon |
| 02/12/1997 | CN1142541A Direct reduction process of sponge iron coal base |
| 02/11/1997 | US5601631 Process for treating metal oxide fines |
| 02/11/1997 | US5601630 Process for the production of synthetic rutile |
| 02/06/1997 | WO1997004138A1 Process for producing liquid pig iron or intermediate steel products and installation for implementing it |
| 02/06/1997 | WO1997004137A1 Process for producing liquid raw iron or semi-finished steel products and installation for implementing it |
| 02/06/1997 | WO1997004136A1 Process for producing liquid pig iron or semi-finished steel products and installation for implementing it |
| 02/06/1997 | CA2227231A1 Process for producing liquid pig iron or intermediate steel products and installation for implementing it |
| 02/06/1997 | CA2200323A1 Process for producing liquid pig iron or semi-finished steel products and installation for implementing it |
| 02/06/1997 | CA2200322A1 Process for producing liquid raw iron or semi-finished steel products and installation for implementing it |
| 02/05/1997 | CN1142249A Apparatus for melting fine particles containing carbon and method thereof |
| 02/05/1997 | CN1142248A Fluidized bed type reduction apparatus for iron ores and method for reducing iron ores using the apparatus |
| 02/04/1997 | US5599375 Electric arc furnace equipped with auxiliary heat source |
| 02/04/1997 | US5599361 Stable compressed solid fuel pellets or briquets containing coal and/or coke fines with polymeric binder |
| 01/29/1997 | CN1141346A Method for prodn. of spongy iron by vertical furnace using coal gas |
| 01/29/1997 | CN1141345A Process and apparatus for producing molten pig iron |
| 01/22/1997 | EP0754767A1 Oxy-fuel rotary kiln hearth melting furnace |
| 01/22/1997 | EP0754766A1 Method and apparatus for producing pig iron by smelting reduction and method of obtaining such a plant |
| 12/31/1996 | US5590150 Electric arc melting furnace |
| 12/31/1996 | US5589118 Forming into briquettes with binder |
| 12/31/1996 | US5588982 Process for producing foudry iron |
| 12/27/1996 | WO1996041895A1 Method for producing molten iron |
| 12/18/1996 | EP0748392A1 Apparatus for melting fine particles containing carbon and method for melting such fine particles using the apparatus |
| 12/18/1996 | EP0748391A1 Fluidized bed type reduction apparatus for iron ore particles and method for reducing iron ore particles using the apparatus |
| 12/17/1996 | US5584910 Preheating iron ore and fluxes including fines, reducing to sponge iron, melting in presence of carbon carriers and oxygen-containing gas to produce reducing gas, passing first portion to reducing zone, purifying second portion |
| 12/12/1996 | WO1996039290A1 Process for recovering iron from iron-rich material |
| 12/12/1996 | DE19520651A1 Utilisation of clarifier and waterworks sludge |
| 12/12/1996 | CA2223044A1 Process for recovering iron from iron-rich material |
| 12/11/1996 | EP0747491A1 Method of reducing metal oxide in a rotary hearth furnace heated by an oxidizing flame |
| 12/11/1996 | EP0747490A1 Direct use of sulfur-bearing nickel concentrate in making Ni alloyed stainless steel |
| 12/11/1996 | EP0696327B1 An electrical method for conversion of molecular weights of particulates |
| 12/10/1996 | US5582631 Combining with iron-poor material such as exhaust fumes; treating with ammonium chloride leaching solution; separation; roasting |
| 12/10/1996 | US5582029 Use of nitrogen from an air separation plant in carbon dioxide removal from a feed gas to a further process |