| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 03/04/1999 | CA2340191A1 Direct iron and steelmaking |
| 03/03/1999 | EP0899345A1 Reduced iron manufacturing method and apparatus |
| 03/03/1999 | CN1209845A Reduced iron mfg. method and apparatus |
| 03/03/1999 | CN1042347C 生产铁的方法 Production of iron approach |
| 03/03/1999 | CN1042346C Hot pressed carboniferous ore ball fast direct reducing or calcining process |
| 03/02/1999 | US5876679 Grid baffle structure to provide increased theoretical stages within the reactor to enable the reactor to be used for time/temperature dependent reactions requiring a number of mixing stages and/or an increased particle residence time. |
| 03/02/1999 | CA2096805C A direct-reduction process for directly reducing particulate iron-oxide-containing material |
| 02/25/1999 | WO1999009220A1 Method and apparatus for the direct reduction of a material containing iron oxide in a particulate form |
| 02/24/1999 | EP0897968A2 Method for treating plastics and solid fuel obtained by the same method |
| 02/24/1999 | EP0897430A1 Method of producing liquid crude iron or liquid steel fabricated materials |
| 02/24/1999 | EP0897429A1 Method and device for direct reduction of ore fines |
| 02/23/1999 | US5873926 Process for reducing oxide-containing material and plant for carrying out the process |
| 02/23/1999 | US5873925 Forming green compacts comprising iron ore agglomerated with stoichiometric excess of carbonaceous reducing agent, chemical reduction to elemental iron in heated furnace; by-product inhibition |
| 02/18/1999 | DE19739697C1 Iron ore reduction |
| 02/17/1999 | EP0896636A1 Smelting-reduction apparatus, and method for producing molten pig iron using the smelting reduction apparatus |
| 02/17/1999 | CN1042142C Steelmaking process |
| 02/17/1999 | CN1042141C Metallurgical processes and apparatus |
| 02/16/1999 | US5871560 Process and plant for the direct reduction of iron-oxide-containing materials |
| 02/11/1999 | WO1999006600A1 Method for direct reduction and upgrading of fine-grained refractory and earthy iron ores and slags |
| 02/10/1999 | EP0896066A1 Method and apparatus for manufacturing reduced iron |
| 02/09/1999 | US5869018 Two step process for the production of iron carbide from iron oxide |
| 02/09/1999 | US5868735 Cryoplasty device and method |
| 02/03/1999 | CN1207140A Process for producing sponge iron |
| 02/03/1999 | CN1207139A Method and apparatus for manufacturing reduced iron |
| 02/03/1999 | CN1207138A Process for producing liquid pig iron or semifinished steel products from ore |
| 02/02/1999 | US5865875 Process for treating metal oxide fines |
| 01/28/1999 | WO1999004045A1 Shaft furnace |
| 01/28/1999 | CA2296318A1 Shaft furnace |
| 01/27/1999 | EP0541711B1 Method for controlling the conversion of iron-containing reactor feed into iron carbide |
| 01/21/1999 | WO1999002739A1 Method for controlling a smelting reduction process |
| 01/20/1999 | EP0892234A2 Apparatus for use in fluidized solid systems |
| 01/20/1999 | EP0770149B1 Process for producing hydraulic binders and/or alloys, e.g. ferrochromium or ferrovanadium |
| 01/20/1999 | CN1205743A Duplex procedure for prodn. of metals and metal alloys from oxidic metal ores |
| 01/14/1999 | WO1999001583A1 Method for using coal fines in a melt-down gasifier |
| 01/13/1999 | EP0889974A1 Fluidized bed type reducing system for reducing fine iron ore |
| 01/12/1999 | US5858302 Apparatus for electric steelmaking |
| 01/12/1999 | US5858058 Process and plant for avoiding metal dusting in the direct reduction of iron-oxide-containing materials |
| 01/12/1999 | US5858057 Reducing iron oxides with high temperature reducing gas containing hydrogen and carbon monoxide; controlling carbon content of product by controlling water content of reducing gas |
| 01/07/1999 | EP0888462A1 Method and apparatus for making metallic iron |
| 01/07/1999 | EP0858516A4 Agglomeration of iron oxide waste materials |
| 01/06/1999 | CN1203950A New process for producing globular sponge iron by tunnel furnace method |
| 01/05/1999 | US5855645 Production of more concentrated iron product from industrial waste materials streams |
| 01/05/1999 | US5855643 Using synthesis gas |
| 12/30/1998 | WO1998059079A1 Low sulfur iron reduction process using a rotary hearth furnace |
| 12/30/1998 | EP0886682A1 Method for producing steel from iron sponges in an induction furnace |
| 12/30/1998 | EP0791039A4 Method for coking coal |
| 12/30/1998 | EP0777758B1 Arrangement in a wall and a method of coating a wall |
| 12/29/1998 | US5853453 Method of processing iron-containing mettalurgical residual substances as well as arrangement for carrying out said method |
| 12/29/1998 | US5853452 Synthetic rutile production |
| 12/23/1998 | WO1998058091A1 Process and plant for producing iron smelt in an electric arc furnace by using agglomerated, iron-containing steel work residues |
| 12/23/1998 | EP0885972A1 Production of direct reduced iron with reduced fuel consumption and emission of carbon monoxide |
| 12/23/1998 | CN1202526A Method for preparing reduction gas used in producing sponge iron |
| 12/23/1998 | CN1041328C Iron ore cold-set ball body for direct steel-making |
| 12/22/1998 | US5851490 Method for utilizing PH control in the recovery of metal and chemical values from industrial waste streams |
| 12/22/1998 | CA2135780C Electric arc melting furnace |
| 12/16/1998 | EP0884545A1 Electric ARC melting furnace |
| 12/16/1998 | CN1041174C Method and apparatus for treating gases and particulate solids in fluid bed |
| 12/15/1998 | US5849063 Production of direct reduced iron and/or pig iron from industrial waste streams |
| 12/15/1998 | CA2014308C Method and apparatus for the direct reduction of iron |
| 12/10/1998 | WO1998055218A1 Improving the flow field in the inlet plenum of a fluidised bed |
| 12/10/1998 | WO1998033943A3 Device for the controlled cooling of hot-briquetted directly reduced iron sponge |
| 12/09/1998 | EP0882142A1 Process for producing liquid pig iron or semifinished steel products from iron-containing materials |
| 12/09/1998 | EP0882141A1 Direct ironmaking or steelmaking apparatus using self-reducing iron oxide pellets |
| 12/09/1998 | CN1201403A Method of returing finely-divided solid carried by gas extracted from reactor vessel |
| 12/08/1998 | US5846268 Process for producing liquid pig iron or liquid steel preproducts and sponge iron as well as a plant for carrying out the process |
| 12/03/1998 | WO1998054526A1 Charging device for a rotary hearth furnace |
| 12/03/1998 | WO1998054368A1 Method for producing liquid cast iron from iron sponge and installation for its implementation |
| 12/03/1998 | CA2290343A1 Charging device for a rotary hearth furnace |
| 12/01/1998 | US5843368 Apparatus for electric steelmaking |
| 11/24/1998 | US5840097 Method for direct reduction of oxides |
| 11/18/1998 | EP0877822A1 Process for producing liquid pig iron or semifinished steel products from ore |
| 11/18/1998 | CN1040774C Method and apparatus for production of iron from ion oxides |
| 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 |
| 11/12/1998 | WO1998050591A1 Apparatus for manufacturing molten iron by using calcination furnace, and manufacturing method therefor |
| 11/12/1998 | CA2258581A1 Apparatus for manufacturing molten iron by using calcination furnace, and manufacturing method therefor |
| 11/11/1998 | EP0877095A2 process and apparatus for preparing powdery ores for direct reduction |
| 11/10/1998 | US5833734 Fluidization, pressure swing adsorption |
| 11/05/1998 | WO1998049352A1 Method for thermal treatment of granulated iron ore before reduction |
| 11/05/1998 | DE19718136A1 Verfahren zum thermischen Behandeln von körnigem Eisenerz vor der Reduktion Method for the thermal treatment of granular iron ore before reduction |
| 11/04/1998 | EP0796349B1 Sponge iron production process and plant |
| 11/04/1998 | CN1198189A Method for making pozzolans, synthetic blast-furnace slag, Belite or Alite clinkers and pig-iron alloys from oxidic slag and device for implementig this method |
| 11/03/1998 | CA2086955C Direct steel-making process |
| 11/03/1998 | CA2081551C Process and reduction and melting furnace for producing liquid metal from fine metal oxide particles |
| 10/29/1998 | WO1998048066A1 Method for utilizing ph control in the recovery of metal and chemical values from industrial waste streams |
| 10/29/1998 | WO1998048059A1 Furnace with rotating hearth and operating method |
| 10/29/1998 | WO1998048058A1 Method for producing iron carbide from granulated sponge iron |
| 10/29/1998 | WO1998048057A1 Method and device for extracting iron by direct reduction |
| 10/29/1998 | WO1998048056A1 Mixed bed iron reduction process |
| 10/29/1998 | DE19717304A1 Verfahren zum Erzeugen von Eisencarbid aus körnigem Eisenschwamm A method for producing iron carbide of granular sponge iron |
| 10/29/1998 | CA2288095A1 Mixed bed iron reduction process |
| 10/28/1998 | CN1040460C Process and appts. for producing molten pig iron or molten steel preproducts |
| 10/27/1998 | US5827473 Iron oxides are reduced by coal and oxygen containing gases comprising the step of converting existing blast furnace in to the smelting reduction plant including a vessel; lower investment cost |
| 10/22/1998 | WO1998046953A1 Device for charging a rotary furnace |
| 10/22/1998 | WO1998046800A1 Process for producing liquid pig iron or liquid metallurgical preparations |
| 10/22/1998 | DE19717750A1 Verfahren und Vorrichtung zur Gewinnung von Eisen durch Direktreduktion Method and apparatus for the production of iron by direct reduction |
| 10/22/1998 | CA2288654A1 Process for producing liquid pig iron or liquid metallurgical preparations |
| 10/21/1998 | EP0871783A1 Process for producing sponge iron |
| 10/21/1998 | EP0871782A1 Process for producing sponge iron by direct reduction of iron oxide-containing materials |
| 10/21/1998 | EP0871781A1 Process for producing foundry iron |
| 10/21/1998 | CN1196756A Reducing iron oxides in rotary hearth furnace |