| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 06/10/1999 | DE19753184A1 Schmelzofenanlage Melting furnace |
| 06/10/1999 | CA2312035A1 Method for reducing iron oxides and smelting iron and installations therefor |
| 06/09/1999 | EP0921200A1 Process and apparatus for reducing iron oxides and melting iron |
| 06/09/1999 | CN1219208A Fluidized bed treatment of EAF dust |
| 06/09/1999 | CN1219207A Metal containing compound reduction and melting process |
| 06/09/1999 | CN1219205A Process for treatment of particulat matter by fuidisation, and vessel with apparatus to carry out the treatment |
| 06/09/1999 | CA2254683A1 Method of smelting iron ore |
| 06/08/1999 | US5910290 Arrangement in a wall and a method of coating a wall |
| 06/03/1999 | WO1999027141A1 Electric arc low-shaft smelting furnace with a central tube with telescopic electrodes and a sliding upper receptacle lid |
| 06/03/1999 | CA2311541A1 Electric arc low-shaft smelting furnace with a central tube with telescopic electrodes and a sliding upper receptacle lid |
| 06/02/1999 | EP0862657A4 Duplex procedure for the production of metals and metal alloys from oxidic metal ores |
| 06/02/1999 | CN1218516A Method and apparatus for making metallic iron |
| 05/27/1999 | WO1999025881A1 Device for withdrawing lumpy material |
| 05/27/1999 | WO1999025880A1 Method for the direct production of steel from iron-containing materials in a converter |
| 05/27/1999 | CA2310022A1 Device for withdrawing lumpy material |
| 05/26/1999 | EP0865505B1 Process for hot briqueting granular sponge iron |
| 05/26/1999 | CN1217753A Multen reduction apparatus and method for operating same |
| 05/25/1999 | CA2151195C Method of making pig iron with zinc recovery |
| 05/20/1999 | WO1999024627A1 Method for producing directly-reduced iron, liquid pig iron and steel |
| 05/20/1999 | WO1999024626A1 Withdrawal device for a shaft furnace |
| 05/20/1999 | WO1999024625A1 Method for producing a mixture of iron carbide and granular, directly reduced iron |
| 05/20/1999 | CA2309606A1 Method for producing directly-reduced iron, liquid pig iron and steel |
| 05/20/1999 | CA2308388A1 Withdrawal device for a shaft furnace |
| 05/19/1999 | EP0916742A1 Method of producing iron oxide pellets with low bentonite content |
| 05/19/1999 | EP0916739A2 Gasification process and plant for direct reduction reactors |
| 05/19/1999 | EP0915993A1 Fluidized bed treatment of eaf dust |
| 05/19/1999 | EP0915992A1 A process for the direct production of cast iron from iron bearing ore, and an apparatus suitable to carry out said process |
| 05/19/1999 | EP0882141A4 Direct ironmaking or steelmaking apparatus using self-reducing iron oxide pellets |
| 05/18/1999 | US5904895 Apparatus for electric steelmaking |
| 05/18/1999 | US5904119 Furnace apparatus for fluidized bed processes |
| 05/18/1999 | CA1340545C Process and apparatus for post combustion of reaction gases |
| 05/14/1999 | WO1999022870A1 Method for upgrading iron ore utilizing multiple magnetic separators |
| 05/12/1999 | EP0914477A1 3-stage fluidized bed type fine iron ore reducing apparatus having x-shaped circulating tubes |
| 05/12/1999 | EP0914476A1 Apparatus for keeping optimal penetration depth formed at front end of oxygen tuyere and method for keeping the same |
| 05/12/1999 | EP0914475A1 Method of producing liquid pig iron or liquid steel precursors |
| 05/12/1999 | EP0914474A1 Metal reduction and melting process |
| 05/12/1999 | CN1216322A Gasification process and plant for direct reduction reactors |
| 05/11/1999 | US5902375 Method of melting tinned iron scrap |
| 05/11/1999 | US5902372 Process and apparatus for processing a shredder light fraction in a melt |
| 05/06/1999 | EP0912662A1 Method for increasing the charring ratio of coal |
| 05/06/1999 | DE19753142A1 Method for preliminary reduction of iron ore with coal in a coke furnace |
| 05/05/1999 | CN1216071A Method of producing liquid crude iron or liquid steel fabricated materials |
| 05/05/1999 | CN1216070A Method and device for direct reduction of ore fines |
| 05/04/1999 | US5899688 For the treatment of minerals |
| 04/30/1999 | CA2251339A1 Method of producing iron oxide pellets |
| 04/29/1999 | WO1999020801A1 Method and apparatus for making metallic iron |
| 04/28/1999 | EP0910674A1 Process for producing a reduction gas for reduction of metal ore |
| 04/28/1999 | EP0910673A1 Process for producing a reduction gas for reduction of metal ore |
| 04/28/1999 | EP0910672A1 Process for charging of metal carrying materials in a melt gasifier |
| 04/28/1999 | EP0910671A1 Process and device for coating a fusion gasifier with gasifying means and spongy iron |
| 04/28/1999 | EP0910295A1 Cryoplasty device and method |
| 04/27/1999 | US5897829 Apparatus for reducing fine iron ore |
| 04/27/1999 | US5897674 Method for manufacturing coal agglomerates for use in direct iron smelting reducing furnace |
| 04/22/1999 | WO1999019520A1 Method and apparatus for controlling dri carburization |
| 04/15/1999 | WO1999018245A1 Method for smelting fine grained direct reduced iron in an electric arc furnace |
| 04/14/1999 | CN1213700A Iron manufacturing process |
| 04/14/1999 | CN1042955C Sponge iron prodn. process and plant for application |
| 04/14/1999 | CN1042954C Process for producing raw or and iron sponge and its equipment |
| 04/08/1999 | WO1999016915A1 Method of operating movable hearth furnace |
| 04/08/1999 | WO1999016914A1 Rotary hearth furnace and its operating method |
| 04/08/1999 | WO1999016913A1 Rotary hearth furnace for reducing oxides, and method of operating the furnace |
| 04/08/1999 | WO1999016912A1 Method of operating rotary hearth furnace for reducing oxides |
| 04/08/1999 | WO1999016911A1 Direct smelting process for producing metals from metal oxides |
| 04/08/1999 | DE19744151A1 Method for melting fine-grained, directly reduced iron in an electric arc furnace |
| 04/07/1999 | CN1042840C Fluidized bed type reduction apparatus and method for iron ore particles |
| 04/06/1999 | US5891214 Smelting reduction method with increased effectiveness |
| 03/31/1999 | EP0905260A1 Smelting reduction apparatus and method of operating the same |
| 03/31/1999 | EP0904420A1 Metal containing compound reduction and melting process |
| 03/31/1999 | EP0904416A1 Method of charging metalliferous material into a smelting-gasification zone |
| 03/31/1999 | EP0904415A1 Device for producing sponge iron |
| 03/31/1999 | CN1212731A Process for production of spongy metal |
| 03/31/1999 | CN1212730A Process for production of liquid pig iron or liquid intermediate products of steel and plant for carrying out said process |
| 03/31/1999 | CN1212729A Process for production of liquid pig iron or liquid intermediate products of liquid steel and spongy metal |
| 03/31/1999 | CN1212728A Plant and process for production of spongy metal |
| 03/31/1999 | CN1212290A Production of fuel gas |
| 03/25/1999 | DE19815968C1 Briquetted sponge iron production |
| 03/24/1999 | EP0902841A1 Process for the treatment of particulate matter by fluidisation, and vessel with apparatus to carry out the treatment |
| 03/24/1999 | EP0858365B1 Method of returning a finely-divided solid extracted from a reactor vessel using a gas |
| 03/24/1999 | CN1211624A Production of direct reduced iron with reduced fuel consumption and emission of carbon monoxide |
| 03/23/1999 | US5885521 Apparatus for rapid reduction of iron oxide in a rotary hearth furnace |
| 03/23/1999 | US5885328 Method of agglomerating oil-containing steel mill waste |
| 03/23/1999 | US5885325 Process and apparatus for the manufacture of steel |
| 03/23/1999 | US5885322 Controlling reactor conditions after start-up to keep iron melt below 1550 degrees celcius, slag weight above 0.8 tons per square meter, and ferrous oxide content of slag within 2-5 percent; pollution control |
| 03/23/1999 | CA2052170C Pyrometallurgical process for treating a feed material |
| 03/17/1999 | EP0902093A1 Iron manufacturing |
| 03/17/1999 | CN2310768Y Direct steelmaking connection device for blast furnace |
| 03/17/1999 | CN1211283A 3-stage fluidized bed type fine iron ore reducing apparatus having X-shaped circulating tubes |
| 03/16/1999 | US5883918 Oxy:fuel melting furnace |
| 03/16/1999 | US5882579 Apparatus for producing direct reduced iron utilizing a reducing gas with a high content of carbon monoxide |
| 03/16/1999 | US5882375 From basic steel slags containing chromium and/or vanadium |
| 03/16/1999 | US5882374 Process for producing foundry iron with an insulated electrode |
| 03/16/1999 | CA2143920C Method of charging ore |
| 03/11/1999 | WO1999011826A1 Method of making iron and steel |
| 03/11/1999 | WO1999011825A1 Device for producing sponge iron |
| 03/11/1999 | WO1999011571A1 Oxygen-fuel boost reformer process and apparatus |
| 03/11/1999 | CA2301266A1 Device for producing sponge iron |
| 03/10/1999 | CN1210562A Steel-making method and plant |
| 03/09/1999 | US5879618 Whirl-bed drying means, drying gas purification; avoids disturbances due to dust |
| 03/04/1999 | WO1999010544A1 Direct iron and steelmaking |
| 03/04/1999 | DE19739443A1 Vorrichtung zur Erzeugung von Eisenschwamm Device for producing sponge iron |