| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 05/26/1993 | EP0543757A1 Plant for the reduction of iron ore in circulating fluidised bed |
| 05/26/1993 | EP0542885A1 Process for preheating iron-containing reactor feed prior to being treated in a fluidized bed reactor |
| 05/26/1993 | EP0542803A1 Process for controlling the product quality in the conversion of reactor feed into iron carbide |
| 05/25/1993 | US5213611 Method of controlling metallization of directly reduced ores |
| 05/25/1993 | CA1318134C Method for transferring heat to molten metal, and apparatus therefor |
| 05/19/1993 | EP0541711A1 Method for controlling the conversion of iron-containing reactor feed into iron carbide |
| 05/12/1993 | EP0541269A1 Method and apparatus for continuously producing steel or semi-steel |
| 05/12/1993 | EP0302111B1 Method and furnace for making iron-carbon intermediate products for steel production |
| 05/12/1993 | CN1071957A Process for production of iron |
| 05/05/1993 | EP0539416A1 Method and apparatus for treating gases and/or solid material in a circulating fluidized bed reactor |
| 05/04/1993 | US5208004 Method for the recovery of zinc oxide |
| 04/28/1993 | EP0538717A1 Method for the pyrometallurgical treatment of iron oxides and heavy metals contained in the fumes of electric arc furnaces |
| 04/22/1993 | CA2080879A1 Method for the pyrometallurgical treatment of iron oxides and heavy metals contained in the fumes of electric arc furnaces |
| 04/21/1993 | CN1071203A Metal refining method |
| 04/21/1993 | CN1071202A Continuous producting of iron-carbon alloy using iron carbide |
| 04/13/1993 | US5201940 Pre-heating and pre-reduction of a metal oxide |
| 04/07/1993 | EP0536018A1 Wall electrode for metallurgical electric direct current furnace |
| 04/06/1993 | CA1315541C Pneumatic steelmaking vessel and method of producing steel |
| 04/04/1993 | WO1993007300A1 Continuous production of iron-carbon alloy using iron carbide |
| 04/01/1993 | WO1993006251A1 Process for production of iron |
| 03/31/1993 | EP0534243A1 A method and apparatus for treating gases and particulate solids in a fluid bed |
| 03/31/1993 | EP0534020A1 Molten metal producing and refining method |
| 03/30/1993 | US5198019 Manufacture of iron and steel in a duplex smelter and solid state oxide suspension prereducer |
| 03/26/1993 | CA2079202A1 A method and apparatus for treating gases and perticulate solide in a fluid bed |
| 03/17/1993 | CN1020115C Method for producing chromium-containing molten iron with low sulphur concentration |
| 03/09/1993 | US5192486 Plant and process for fluidized bed reduction of ore |
| 02/16/1993 | US5186741 Direct reduction process in a rotary hearth furnace |
| 02/09/1993 | US5185032 Process for fluidized bed direct steelmaking |
| 02/02/1993 | US5183495 Method for controlling a flow rate of gas for prereducing ore and apparatus therefor |
| 01/27/1993 | EP0524399A2 Two-zone countercurrent smelter system |
| 01/27/1993 | CN1068370A Opening method of ore-smelting furnace |
| 01/27/1993 | CA2069560A1 Two-zone countercurrent smelter system |
| 01/26/1993 | US5181954 Portland cement |
| 01/26/1993 | CA1313044C Melting gasifier |
| 01/13/1993 | EP0522331A2 Disposal of contaminants present in scrapped auto-mobiles or apparatuses |
| 01/13/1993 | CN1067923A Double-vessel iron ore direct reducing technology and furnace type |
| 01/13/1993 | CA2072778A1 Disposal method for organic and inorganic nonmetallic ancillary materials from used vehicles, used appliances and the like |
| 12/30/1992 | CN1067453A Method for transport of sponge iron |
| 12/30/1992 | CN1019669B Process and apparatus for reduction of molten iron ore |
| 12/22/1992 | US5173244 Slag control apparatus and method |
| 12/22/1992 | CA1311618C Process for melting scrap iron, sponge iron and/or solid pig iron or the like |
| 12/02/1992 | EP0516613A1 Plant comprising a shaft, in particular a reduction shaft furnace |
| 12/02/1992 | EP0515744A1 Method for the transport of sponge iron |
| 12/01/1992 | CA1310836C Process for continuously melting of steel |
| 12/01/1992 | CA1310827C Apparatus for charging a melting gasifier with gasification media and sponge iron |
| 12/01/1992 | CA1310826C Method for operating a melt-down gasifier and melt-down gasifier for the implementation of said method |
| 11/25/1992 | EP0515124A1 Method and apparatus for the production of a hot fluid stream for energy recovery |
| 11/24/1992 | CA2069274A1 Fluid production method and apparatus |
| 11/18/1992 | CN1019136B Method for prodn. of ferrocarbon intermediate product for use in steel prodn. |
| 11/17/1992 | US5163997 High-production rotary furnace steelmaking |
| 11/11/1992 | CN1019025B Method and apparatus for reduction of material containing metal oxide |
| 11/04/1992 | CN1065883A Process for production of liquid metal from fine-grain metal oxide particles and reducing and smelting furnace for carrying out process |
| 10/20/1992 | CA1308917C Method for manufacturing chromium-bearing pig iron |
| 10/14/1992 | EP0508166A2 Direct reduction process and apparatus |
| 09/29/1992 | CA1307907C Process for removing sulphur from the waste gas of a reduction shaft furnace |
| 09/22/1992 | US5149487 Prereduction furnace of a smelting reduction facility of iron ore |
| 09/22/1992 | US5149363 Using self-reduction furnace; full burining of fuels to carbon dioxide and water for attaining high energy and combustion of carbon monooxide produced at the interior of furnace |
| 09/22/1992 | US5149062 Prereduction furnace of a smelting reduction facility of iron ore |
| 09/17/1992 | DE4108283A1 Verfahren zum herstellen von fluessigem metall aus feinkoernigen metalloxidpartikeln und reduktions- und schmelzofen zur durchfuehrung des verfahrens Method for the manufacture of liquid metal from feinkoernigen metal oxide and reduction and melting furnace for performing the method |
| 09/16/1992 | EP0503900A1 Air separation |
| 09/15/1992 | WO1992016663A1 Process and reduction and melting furnace for producing liquid metal from fine metal oxide particles |
| 09/15/1992 | CA1307396C Charging material preheater for preheating charging material for a metallurgical smelting unit |
| 09/12/1992 | CA2062589A1 Air separation |
| 09/09/1992 | CN1064316A Method of starting plant for production of pig iron or steel pre-material as well as arrangement for carrying out method |
| 09/03/1992 | DE4042176A1 Verfahren zur reduktion von metalloxiden im schmelzfluessigen zustand A process for the reduction of metal oxides in the state schmelzfluessigen |
| 08/26/1992 | EP0500517A1 Method of starting a plant for producing pig iron or steel pre-material and a plant for carrying out such a method |
| 08/25/1992 | US5141208 Foundry plant with rotary furnaces and process of operation |
| 08/19/1992 | CN1017920B Method of and apparatus for melting metal waste |
| 08/18/1992 | US5139568 Continuous production of iron-carbon alloy using iron carbide |
| 08/11/1992 | US5137566 Process for preheating iron-containing reactor feed prior to being treated in a fluidized bed reactor |
| 08/04/1992 | US5135572 Method for in-bath smelting reduction of metals |
| 08/04/1992 | CA1305862C Method and plant for fully continuous production of steel strip from ore |
| 07/29/1992 | CN1017629B Process for continuously melting scrap as well as apparatus for performing this process |
| 07/29/1992 | CN1017628B Method for smelting molten iron directly from powdered coal and iron ore |
| 07/28/1992 | US5133801 Two flows of solids with reactive gas |
| 07/22/1992 | EP0495455A1 Method and apparatus for coating iron-bearing particles to be processed in a direct reduction process |
| 07/21/1992 | US5131942 Particle size of reducing agent is correlated with gas flow velocity, fluidized beds, smelting |
| 07/15/1992 | CA2059250A1 Method and apparatus for coating iron-bearing particles to be processed in a direct reduction process |
| 07/14/1992 | US5129630 Prereduction furnace of a smelting reduction facility of iron ore |
| 07/08/1992 | EP0493752A1 Process and apparatus for reinjecting hot dusts |
| 06/30/1992 | WO1992012265A1 Reduction of metal oxides |
| 06/28/1992 | WO1992012264A1 Fluidized bed preliminary reducing furnace for raw material comprising oxide |
| 06/22/1992 | WO1992011499A1 Method and apparatus for controlling temperature in a circulating fluidized bed reactor |
| 06/22/1992 | CA2098577A1 Method and apparatus for controlling temperature in a circulating fluidized bed reactor |
| 06/10/1992 | CN1016968B Process for feeding heat energy into molten metal bath |
| 06/09/1992 | CA1302714C Apparatus and method for treating metallic fines |
| 06/03/1992 | EP0488429A2 Apparatus for manufacturing iron by melting and reduction |
| 06/03/1992 | EP0487856A2 Process for producing pig iron or reduced iron |
| 06/02/1992 | US5118479 Converting reactor feed to iron carbide for steel making |
| 06/02/1992 | CA1302518C Plasma fired feed nozzle |
| 05/27/1992 | EP0487494A1 Plant for the production of molten metals |
| 05/26/1992 | CA1301453C Metal-making apparatus involving the smelting reduction of metallic oxides |
| 05/20/1992 | CN1016704B Process for reduction smelting iron ore |
| 05/20/1992 | CN1016703B Process and apparatus for post combustion |
| 05/20/1992 | CA2055737A1 Plant for the production of molten metals |
| 05/13/1992 | CN1016618B Process for directly reducing iron oxide-containing materials in rotary kiln |
| 05/05/1992 | US5110350 Method of reducing iron ore |
| 04/13/1992 | CA2047336A1 Method and apparatus for the direct reduction of iron |
| 04/02/1992 | WO1992005001A1 Process and device for the reduction annealing of powdered iron |
| 04/01/1992 | EP0478322A1 Pyrometallurgical process for treating a feed material |