| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 10/26/1999 | US5972066 Mixed bed iron reduction process |
| 10/20/1999 | EP0950117A1 A method and an apparatus for producing metals and metal alloys |
| 10/19/1999 | US5968448 Process and apparatus for producing molten pig iron |
| 10/14/1999 | WO1999051783A1 Method and apparatus for producing molten iron from iron oxides |
| 10/14/1999 | WO1999051710A1 Carbon pellets |
| 10/13/1999 | EP0949338A2 Fluidized bed process for the production of iron carbide |
| 10/13/1999 | EP0948654A1 Method for producing liquid pig iron or steel fabricated materials and installation for implementing said method |
| 10/06/1999 | EP0947586A1 Method and apparatus for rapid reduction of iron oxide in a rotary hearth furnace |
| 10/06/1999 | EP0946849A1 Device for discharging or mixing lump materials |
| 10/06/1999 | EP0946767A1 Recovery of iron products from waste material streams |
| 10/06/1999 | EP0946760A1 Method and device for producing silicon-rich foundry iron |
| 10/06/1999 | EP0946759A1 Apparatus for manufacturing molten iron by using calcination furnace, and manufacturing method therefor |
| 10/06/1999 | EP0946758A1 Method for making liquid metal |
| 10/06/1999 | EP0946757A1 Method for blowing fine particles containing metal oxide into a reducing gas |
| 10/06/1999 | EP0946756A1 Producing iron from solid iron carbide |
| 10/06/1999 | CN1231000A Metal reduction and melting process |
| 10/06/1999 | CN1045474C Process and apparatus for producing molten pig iron or molten steel preproducts, and sponge-iron hot pressing dough |
| 10/05/1999 | US5961690 Process for producing molten pig iron of liquid steel preproducts and plant for carrying out the process |
| 10/05/1999 | US5961055 Method for upgrading iron ore utilizing multiple magnetic separators |
| 09/29/1999 | CN1045313C Process and equipment for producing spongy iron |
| 09/28/1999 | US5958156 Process for treating a particulate material within a rotating retort |
| 09/28/1999 | US5958107 Lowering carbon monoxide content of process gas to a level that inhibits carbon deposition when preheating gasifier for direct reduction of iron |
| 09/25/1999 | CA2261173A1 Treatment of steel mill waste metal oxides |
| 09/23/1999 | CA2266139A1 Method of producing reduced iron agglomerates |
| 09/21/1999 | US5954855 Method for electric steelmaking |
| 09/21/1999 | CA2144672C Method of treating fine ore |
| 09/16/1999 | WO1999046411A1 Method for producing liquid pig iron and/or steel blanks |
| 09/16/1999 | WO1999046410A1 Method and apparatus for rapid reduction of iron oxide in a rotary hearth furnace |
| 09/16/1999 | CA2322507A1 Method for producing liquid pig iron and/or steel blanks |
| 09/15/1999 | EP0655084B1 Improved molten metal decomposition apparatus and process |
| 09/14/1999 | US5951740 Production of direct reduced iron with reduced fuel consumption and emission of carbon monoxide |
| 09/14/1999 | CA2153081C Method and apparatus for production of iron from iron compounds |
| 09/14/1999 | CA2119448C Process for production of iron |
| 09/08/1999 | CN1045009C Jet reduction iron smelting method and its equipment |
| 09/07/1999 | US5948139 Process for the production of molten pig iron or steel pre-products and a plant for carrying out the process |
| 08/31/1999 | US5944871 Melting, gasification of fine iron particles |
| 08/31/1999 | CA2078904C Wall electrode for direct current electric metallurgical furnace |
| 08/26/1999 | WO1999042777A1 Multichamber division type fluidized bed furnace |
| 08/26/1999 | WO1999042624A1 Method and apparatus for producing direct reduced iron with improved reducing gas utilization |
| 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 |
| 08/18/1999 | EP0936272A1 Smelting iron ore |
| 08/17/1999 | US5938815 Supplying mixture of ore, oxygen gas, carbon to secondary reactor for low temperature partial reduction of ore to form calorific gas products, further reduction of hot solids in primary reactor at higher temperature; thermal efficiency |
| 08/12/1999 | WO1999040229A1 Method for loading an electric oven with a powder material in the form of a filled hollow body |
| 08/12/1999 | DE19838368C1 Method and installation for reducing iron ore |
| 08/11/1999 | EP0934904A2 Integration of partial oxidation process and direct reduction reaction system |
| 08/05/1999 | WO1999039013A1 Method for reducing iron oxides and installation therefor |
| 08/05/1999 | CA2315920A1 Method for reducing iron oxides and installation therefor |
| 08/04/1999 | EP0933436A1 Installation and process for melting of direct-reduced iron |
| 08/04/1999 | EP0933434A1 Process and apparatus for reducing iron oxides |
| 08/04/1999 | EP0933433A1 Process and apparatus for reducing iron oxides |
| 08/04/1999 | CN1225139A Process for producing a reduction gas for reduction of metal ore |
| 08/04/1999 | CN1225138A Process for producing a reduction gas for reduction of metal ore |
| 07/28/1999 | EP0931841A1 Apparatus and process for the direct reduction of iron oxides |
| 07/28/1999 | EP0931167A1 Device for dosed introduction of fine particle material into a reactor vessel |
| 07/28/1999 | CN1044386C Method for intensifying reaction in metallurgical reaction vessels |
| 07/27/1999 | US5930579 Newly formed hot briquettes of iron reduced by direct reduction are gradually cooled using water spray to increase impact strength/corrosion resistance of briquette |
| 07/22/1999 | WO1999036581A1 Sustainable steelmaking by efficient direct reduction of iron oxide and solid waste minimisation |
| 07/22/1999 | WO1999036579A1 Method for producing hot metal |
| 07/22/1999 | DE19800418A1 Verfahren zur Erzeugung von Roheisen A process for the production of pig iron |
| 07/22/1999 | CA2318185A1 Method for producing hot metal |
| 07/21/1999 | EP0929699A1 Method for producing liquid cast iron from iron sponge and installation for its implementation |
| 07/21/1999 | CN1223693A Method of producing liquid pig iron or liquid steel precursors |
| 07/21/1999 | CN1223301A One-step steel-making process from iron ore |
| 07/20/1999 | US5924861 Furnace discharge assembly |
| 07/15/1999 | WO1999035294A1 Method for producing pig iron |
| 07/15/1999 | CA2317509A1 Method for producing pig iron |
| 07/13/1999 | US5922261 Process for recovering iron from iron-rich material |
| 07/13/1999 | CA2087609C Process for preheating iron-containing reactor feed prior to being treated in a fluidized bed reactor |
| 07/08/1999 | WO1999034022A1 Refining method of molten iron and reduction smelting method for producing the molten iron |
| 07/08/1999 | CA2315031A1 Refining method of molten iron and smelting reduction method for producing molten iron |
| 07/07/1999 | EP0927770A1 High carbon content iron-base briquettes and process for preparing same |
| 07/07/1999 | CN2327694Y Separate dual reduction furnace |
| 07/07/1999 | CN1222198A Melting gasifier for producing molten metals |
| 07/07/1999 | CN1222197A Device for producing sponge iron |
| 07/06/1999 | US5919662 Producing biotin and/or desthiobiotin at high yield by culturing to high density escherichia coli strain containing recombinant plasmid with biotin operon; less growth inhibition by build-up of acetate in media |
| 07/06/1999 | US5919281 Efficient separation of particle sizes |
| 07/01/1999 | WO1999032668A1 Apparatus for manufacturing molten pig iron and reduced iron by utilizing fluidized bed, and method therefor |
| 07/01/1999 | WO1999032667A1 Directly charging device for directly charging reduced fine iron ore into melter-gasifier |
| 07/01/1999 | WO1999032666A1 Two step twin-single fluidized bed type pre-reduction apparatus for pre-reducing fine iron ore, and method therefor |
| 07/01/1999 | CA2281748A1 Directly charging device for directly charging reduced fine iron ore into melter-gasifier |
| 07/01/1999 | CA2281595A1 Apparatus for manufacturing molten pig iron and reduced iron by utilizing fluidized bed, and method therefor |
| 07/01/1999 | CA2281591A1 Two step twin-single fluidized bed type pre-reduction apparatus for pre-reducing fine iron ore, and method therefor |
| 06/30/1999 | EP0925375A1 Process for the production of spongy metal |
| 06/30/1999 | CN1221457A Method of charging metalliferous material into smelting-gasification zone |
| 06/23/1999 | EP0924304A1 Method of producing reduced iron pellets |
| 06/17/1999 | WO1999029910A1 Method for producing directly reduced iron in a layered furnace |
| 06/17/1999 | CA2312465A1 Method for producing directly reduced iron in a layered furnace |
| 06/16/1999 | EP0922116A1 Melting gasifier for producing molten metals |
| 06/16/1999 | CN1219976A Process and device for coating fusion gasifier with gasifying means and spongy iron |
| 06/16/1999 | CN1219596A Plant and process for producing raw iron and/or sponge iron |
| 06/16/1999 | CN1043660C Method for production of sponge iron filtering material used for deoxidizing device |
| 06/15/1999 | US5912916 Electric furnace with insulated electrodes and process for producing molten metals |
| 06/15/1999 | US5912403 Cold briquette of waste materials as an aggregate for smelting furnaces of an iron foundry and method of producing the same |
| 06/15/1999 | US5912400 Method for reforming reducing gas in a fluidized bed process for reduction of ore |
| 06/10/1999 | WO1999028512A1 Method for reducing iron oxides and smelting iron and installations therefor |
| 06/10/1999 | WO1999028511A1 Method for reforming reducing gas in a fluidized bed process for reduction of ore |
| 06/10/1999 | WO1999028235A1 Method of manufacturing iron carbide |
| 06/10/1999 | DE19854632A1 Method and installation for reducing materials containing metal oxides |
| 06/10/1999 | DE19854631A1 Reduction vessel for materials containing metal oxides |
| 06/10/1999 | DE19854630A1 Installation and method for reducing materials containing metal oxides |