| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 06/27/2002 | US20020079625 Furnace for the direct reduction of iron oxides and method for the manufacturing thereof |
| 06/27/2002 | US20020078795 Heating coal with an exhaust gas from an iron ore furnace to lower the moisture, gasifying in a furnace to produce a coal derived gas containing a reducing gas, which can reduce iron ore |
| 06/26/2002 | EP1217082A2 Method of blowing synthetic resin into furnace and apparatus therefor |
| 06/26/2002 | CN1355853A Method for producing melt iron |
| 06/25/2002 | US6409790 Processing metal oxides with carbon and heat |
| 06/20/2002 | WO2002048407A1 Method and device for increasing the thermal capacity of an at least partially reducing reaction gas |
| 06/20/2002 | US20020076670 Method of operating a rotary hearth furnace |
| 06/20/2002 | DE10060516A1 Verfahren zum Eintragen von körnigem Erz in einen Röstofen Method for introducing granular ore into a roasting furnace |
| 06/19/2002 | EP1214455A1 Device for the direct reduction of iron oxides |
| 06/19/2002 | EP0882141B1 Direct ironmaking or steelmaking apparatus using self-reducing iron oxide pellets |
| 06/18/2002 | US6406662 Rotary hearth furnace with charge slot air shield |
| 06/13/2002 | WO2002046673A2 Method for introducing a granular ore into a roasting kiln |
| 06/12/2002 | EP1213362A2 Rotary hearth furnace for producing reduced metal and method of producing reduced metal |
| 06/12/2002 | EP1212471A1 Furnace for the direct reduction of iron oxides |
| 06/12/2002 | EP1212470A1 Method for operating a melt-down gasifier |
| 06/12/2002 | EP1165845A4 Method and apparatus for removing undesirable metals from iron-containing materials |
| 06/12/2002 | CN1353201A Electric arc furnace for reducing and smelting iron ore and refining steel and its technology |
| 06/11/2002 | US6403022 Using gravity |
| 06/11/2002 | US6402808 Direct smelting process |
| 06/04/2002 | US6399016 Direct smelting plant |
| 06/04/2002 | US6398842 Apparatus for injecting solid particulate material into a vessel |
| 05/30/2002 | WO2001096233A9 Method and apparatus for supplying hydrogen and portable cassette for supplying hydrogen |
| 05/28/2002 | US6395057 Method for producing directly reduced iron in a layered furnace |
| 05/28/2002 | US6395056 Method for the heat treatment of iron ore lumps in a reduction system |
| 05/28/2002 | US6395055 Gravity reduction of iron oxides to iron using hydrogen and carbon monoxide injected into furnace |
| 05/28/2002 | US6395054 Process for producing pozzolanes, synthetic blast furnace slags, belite or alite clinkers, or pig iron alloys from oxidic slags |
| 05/28/2002 | US6395052 Method for producing directly-reduced iron, liquid pig iron and steel |
| 05/23/2002 | US20020061275 From an iron ore reducing plant, by swirling the sponge iron in a methane gas with low water content in a fluidized bed reactor over given temperature range |
| 05/21/2002 | US6391249 Reduction of iron oxide to forn sponge iron |
| 05/21/2002 | US6391088 Heat treatment residues, oils and iron oxide in furnace |
| 05/16/2002 | WO2002038815A1 Method for operating rotary hearth type reducing furnace and rotary hearth type reducing furnace facilities |
| 05/16/2002 | CA2428780A1 Method for operating rotary hearth type reducing furnace and rotary hearth type reducing furnace facilities |
| 05/15/2002 | EP1205561A1 Furnace for the direct reduction of iron oxides and method for the manufacturing of iron |
| 05/15/2002 | EP1204773A1 Method for the preparation of fine grain ores |
| 05/15/2002 | EP1204768A1 Metal oxide reduction method and device therefor |
| 05/10/2002 | WO2002036836A1 Metal oxide-containing green pellet for reducing furnace, method for production thereof, method for reduction thereof, and reduction facilities |
| 05/10/2002 | WO2002036834A2 Method and apparatus for utilising recyclings containing iron and heavy metals while involving the use of a melting cyclone, a separating vessel, and a vessel for carrying out metallurgical treatment |
| 05/09/2002 | US20020053307 Method for discharging reduced product from a moveable-hearth furnace and a discharging device |
| 05/08/2002 | EP1038038B1 Method for producing directly reduced iron in a multiple hearth furnace |
| 05/08/2002 | EP1027461B1 Method and apparatus for making metallic iron |
| 05/08/2002 | EP1017859B1 Process for producing sponge iron |
| 05/08/2002 | EP0862657B1 Duplex procedure for the production of metals and metal alloys from oxidic metal ores |
| 05/08/2002 | CN1348013A Multiple molten pool oxygen steel-making furnace for iron core reducing melting and its technological process |
| 05/07/2002 | US6383444 For ores |
| 05/07/2002 | US6383252 Method for the heat treatment of residues containing heavy metals |
| 05/07/2002 | US6383251 Heating; reducing iron oxides |
| 05/02/2002 | US20020050188 Direct smelting process |
| 05/02/2002 | US20020050187 Method for producing metallic iron |
| 05/02/2002 | US20020050097 Method and apparatus for producing reformed gases |
| 05/02/2002 | EP1201772A1 A method for discharging reduced product from a movable-hearth furnace and discharging device |
| 05/01/2002 | CN1346723A Process for preparing Fe alloy powder by reducing Fe scales generated by rolling steel and Fe concentrate |
| 05/01/2002 | CN1083890C Smelting furnace |
| 05/01/2002 | CN1083889C Method for producing melted pig iron |
| 04/30/2002 | US6379610 Apparatus and process for treating a particulate material within a rotating retort |
| 04/30/2002 | US6379426 Reducing iron oxide, oxidation and recovering iron oxides |
| 04/30/2002 | US6379424 Direct smelting apparatus and process |
| 04/30/2002 | US6379423 Device for sponge iron |
| 04/30/2002 | US6379422 Direct smelting process |
| 04/30/2002 | US6379421 Demetallization lead, zinc and cadmium from iron materials |
| 04/30/2002 | US6379420 Reducing metal ores with reducing gas |
| 04/25/2002 | US20020046628 Pellets incorporated with carbonaceous material and method of producing reduced iron |
| 04/24/2002 | CN1083489C Direct smelting process for producing metal from metal oxides |
| 04/18/2002 | WO2002012570A3 Method for producing metallic iron |
| 04/17/2002 | CN1345381A Direct iron and steelmaking |
| 04/17/2002 | CN1345380A Facilities for reducing metal oxide, method for operating the facilities and moldings as raw material to be charged to reduction furnace |
| 04/16/2002 | US6372016 Stably forming high-quality iron by reduction of iron oxide with coal; noncorrosive |
| 04/16/2002 | US6372011 Reprocessing in the presence of pig iron; low energy expenditure and capital investment |
| 04/11/2002 | US20020040623 Process and apparatus for automatically controlling slag foaming |
| 04/10/2002 | EP1194596A1 Method and installation with smelting and reduction cyclone and a coupled lower furnace for utilising residual material containing iron and heavy metals and optionally iron ore |
| 04/09/2002 | US6368548 Direct smelting process and apparatus |
| 04/09/2002 | US6368379 Hearth reducing furnace |
| 04/09/2002 | US6368104 Rotary hearth furnace |
| 04/04/2002 | WO2002027043A1 Method and device for producing a static bed |
| 04/03/2002 | EP1192286A2 Process for manufacturing molten metal iron |
| 03/28/2002 | WO2002024963A1 A direct smelting process and apparatus |
| 03/28/2002 | WO2001096800A3 Rotary hearth furnace with charge slot air shield |
| 03/27/2002 | EP1190106A1 Fluidized bed reduction of laterite fines with reducing gases generated "in situ" |
| 03/27/2002 | CN1342209A Method for optimizing layout and operation of reduction method |
| 03/21/2002 | US20020033124 Method of processing synthetic resins into a furnace fuel and method for blowing synthetic resins as a fuel into a furnace |
| 03/21/2002 | US20020033075 Method of producing iron nuggets |
| 03/21/2002 | US20020033074 For ores |
| 03/20/2002 | EP1187942A1 Method for producing melt iron |
| 03/20/2002 | EP1187941A1 Method of producing metallic iron and raw material feed device |
| 03/14/2002 | US20020032438 Cryoplasty device and method |
| 03/14/2002 | US20020030310 Apparatus for the direct reduction of iron oxides |
| 03/14/2002 | US20020030309 Apparatus for producing reduced iron and compact drying method applied to the apparatus |
| 03/14/2002 | US20020029660 Providing bed of agglomerates containing ore and carbonaceous reductant on hearth of furnace, heating radiant heat source to reduce iron oxides in ore or waste oxides to metallic iron |
| 03/13/2002 | EP1186675A1 Apparatus for controlling introduced air in metal oxide reducing furnace |
| 03/13/2002 | EP1185714A1 Method for producing reduced iron |
| 03/13/2002 | EP0998586B1 Shaft furnace |
| 03/13/2002 | CN1339686A Method and its device for feeding raw materials to movable hearth furnace |
| 03/12/2002 | US6355088 Method for direct reduction and upgrading of fine-grained refractory and earthy iron ores and slags |
| 03/07/2002 | US20020027317 Apparatus for controlling introduced air in metal oxide reducing furnace |
| 03/06/2002 | EP0817868B1 Method for injecting fine iron ore in smelting reducing process |
| 03/06/2002 | CN1338523A High-temp gas method and equipment for producing spony iron |
| 03/06/2002 | CN1080316C Device for producing sponge iron |
| 03/06/2002 | CN1080315C Method and apparatus for making metallic iron |
| 03/05/2002 | US6352574 Process for direct production of cast iron from fine iron ore and fine coal |
| 03/05/2002 | US6352572 Process for the thermal treatment of granulated iron ore prior to the reduction |
| 02/27/2002 | CN1338036A A method and apparatus for reducing a feed material in a rotary hearth furnace |