| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 11/13/2002 | CN1379826A Method and device for enclosing electric arc |
| 11/12/2002 | US6478848 Direct smelting process |
| 11/12/2002 | US6478841 Integrated mini-mill for iron and steel making |
| 11/12/2002 | US6478839 Method of induction-heat melting treatment of metal-oxide-containing powders and device therefor |
| 11/07/2002 | WO2002088401A1 Recycling method of waste material by using of coal based iron making process |
| 11/07/2002 | US20020162418 Introducing charge into inlet end of primary reactor of a reactors system while injecting oxygen; passing charge through reactor; discharging into next reactor; heating, changing chemical potential; elements are separated as melted groups |
| 11/06/2002 | EP1255073A2 Method for the utilization of waste heat from pig iron production in rotary hearth furnaces |
| 11/06/2002 | EP0912662B1 Method for increasing the charring ratio of coal |
| 11/06/2002 | CN1093883C Method and apparatus for controlling direct reduction iron carburization |
| 11/05/2002 | US6477195 Process for melting sponge iron and electric-arc furnace for carrying out the process |
| 11/05/2002 | US6475264 Direct smelting process |
| 10/31/2002 | WO2002086407A1 Rabble arm for a furnace |
| 10/31/2002 | WO2002086406A1 Method of operating a multiple hearth furnace |
| 10/31/2002 | CA2443041A1 Method of operating a multiple hearth furnace |
| 10/30/2002 | EP1253207A1 Method and facilities for metal smelting |
| 10/25/2002 | WO2001083830A1 Method and installation for producing a metal melt |
| 10/24/2002 | WO2002027041A3 Method and device for distributing a lumpy bulk material |
| 10/24/2002 | US20020155037 Method and apparatus for supplying hydrogen and portable cassette for supplying hydrogen |
| 10/22/2002 | CA2247311C Smelting-reduction apparatus, and method for producing molten pig iron using the smelting reduction apparatus |
| 10/17/2002 | WO2002081074A1 Process of conveying granular solids |
| 10/17/2002 | DE10121624C1 Evaluating the waste heat produced from pig iron production in rotating furnaces comprises after burning a waste gas together with combustion air to form an inert process gas, forming hot vapor, and super heating the hot vapor |
| 10/17/2002 | DE10116892A1 Verfahren zum Fördern von körnigen Feststoffen A method for conveying granular solids |
| 10/15/2002 | US6464752 Method for producing directly reduced, desulphurized iron |
| 10/10/2002 | WO2002079529A1 Method for direct metal making by microwave energy |
| 10/10/2002 | WO2002079521A1 Method for recovering recyclable metals contained in solid residues from iron and steel industries by means of carbothermic reduction and distillation, in solid and liquid states |
| 10/10/2002 | US20020146291 Process for conveying granular solids |
| 10/09/2002 | EP1246947A1 Method for producing pig iron |
| 10/09/2002 | EP1108070B1 Method for the thermal processing of residues containing heavy metals and iron oxide |
| 10/09/2002 | EP0812347B1 Method for manufacturing coal agglomerates for use in direct iron smelting reducing furnace |
| 10/03/2002 | WO2002077297A1 Transfer of hot feed materials from a preprocessing plant to an electric smelting or melting furnace |
| 10/03/2002 | WO2002046673A3 Method for introducing a granular ore into a roasting kiln |
| 10/03/2002 | WO2002036834A3 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 |
| 10/02/2002 | EP1244818A1 Method and installation for reducing ore fines in a multi-stage suspension gas stream using a cyclone separator |
| 10/01/2002 | WO2002064844A1 Method for producing sponge iron, and reduced iron powder and method for production thereof |
| 10/01/2002 | US6458181 Method for producing pig iron |
| 10/01/2002 | CA2404607A1 Method for manufacturing sponge iron, reduced iron powder, and method for manufacturing the same |
| 09/26/2002 | WO2002075002A1 Method and apparatus for practicing carbonaceous-based metallurgy |
| 09/26/2002 | WO2002075000A2 Modular shaft for reduction smelting |
| 09/26/2002 | US20020136670 Device for preventing back mixture in fluidized bed reactor |
| 09/26/2002 | US20020135109 Modular furnace |
| 09/26/2002 | CA2440243A1 Method and apparatus for practicing carbonaceous-based metallurgy |
| 09/25/2002 | EP1242636A1 Method and device for feeding a gas to a metallurgical vessel |
| 09/25/2002 | EP1105541B1 Method for producing liquid pig iron |
| 09/24/2002 | US6454833 Melter gasifier |
| 09/19/2002 | US20020130448 Direct iron and steelmaking |
| 09/18/2002 | EP1241421A2 Direct smelting plant |
| 09/17/2002 | US6451086 Using hearth furnace |
| 09/17/2002 | US6451085 Agglomeration of powder mixture |
| 09/12/2002 | US20020124690 Charging granular coal and preheated iron ore into a low-temperature carbonization reactor containing oxygen for partial oxidation of coal while being held in turbulent movement |
| 09/11/2002 | CN1369018A Direct smelting process |
| 09/11/2002 | CN1368630A Arc melting furnace |
| 09/11/2002 | CN1368557A Intermediate for producing metal iron, its making method and equipment |
| 09/11/2002 | CN1090680C Withdrawal device for shaft furnace |
| 09/10/2002 | US6447713 Rotating-hearth furnace for reduction of metallic oxides |
| 09/06/2002 | WO2002068700A1 Method for producing a melt iron in an electric furnace |
| 09/05/2002 | US20020123019 Rotary hearth furnace for producing reduced metal and method of producing reduced metal |
| 09/03/2002 | CA2087850C Process and device for the reduction annealing of powdered iron |
| 08/29/2002 | US20020117024 Process and plant for the direct reduction of particulate iron-oxide-containing material |
| 08/28/2002 | CN1366554A Process for manufacturing molten metal iron |
| 08/27/2002 | US6440356 Apparatus for injecting gas into a vessel |
| 08/27/2002 | US6440195 Process and an apparatus for producing metals and metal alloys |
| 08/22/2002 | US20020112792 Fluidization; materials handling; hermetic sealing; for use with metal powders |
| 08/22/2002 | US20020112567 Smelting reduction method |
| 08/21/2002 | EP1232288A1 Method and device for pre-heating and for continuous introduction of a charge for an electric arc furnace |
| 08/21/2002 | CN1365396A Method for producing reduced iron |
| 08/21/2002 | CN1089371C Normal temperature sponge iron deioxidizing agent production method |
| 08/14/2002 | EP1230403A1 A direct smelting process |
| 08/14/2002 | CN1089115C Pre-reduction method and apparatus for fused reduction |
| 08/13/2002 | US6432533 Metallic iron containing slag |
| 08/13/2002 | US6432162 Process for melting ashes, slags or glass |
| 08/07/2002 | EP1228252A1 Method and device for enclosing an electric arc |
| 08/07/2002 | EP1228251A1 Method and device for melting down finely particulate material containing metal, such as sponge iron |
| 08/07/2002 | EP1228249A1 Direct reduction device to obtain metal iron with a high content of carbon in the form of carbide |
| 08/07/2002 | CN1362308A Rotary kiln process of producing reducing ilmenite powder for welding electrode |
| 08/06/2002 | US6428603 Direct smelting process |
| 07/31/2002 | CN1361832A Metal oxide reduction method and device therefor |
| 07/30/2002 | US6426036 Gravitiation reduction from iron oxide |
| 07/30/2002 | CA2236523C Method of returning a finely-divided solid extracted from a reactor vessel using a gas |
| 07/24/2002 | EP1224335A1 Method for direct reduction of materials containing iron oxide |
| 07/24/2002 | EP1137816B1 Method for producing directly reduced, desulfurized iron |
| 07/24/2002 | EP1080235B1 Method for reducing metal oxides and device for implementing said method |
| 07/24/2002 | EP1021569B1 Method and device for extracting iron by direct reduction |
| 07/24/2002 | EP0871781B1 Process for producing foundry iron |
| 07/24/2002 | CN1360061A Rotary hearth furnace and method for producing reduced metal |
| 07/24/2002 | CN1360060A Process and equipment for producing sponge iron from cold agglomerated carbon-containing iron pellet |
| 07/23/2002 | US6423116 Method for extracting iron by direct reduction |
| 07/23/2002 | US6423115 Direct smelting process |
| 07/23/2002 | US6423114 Pressure control |
| 07/18/2002 | WO2002055744A2 Method for producing a mixture of iron ore and semi-coke |
| 07/18/2002 | DE10101157A1 Verfahren zum Erzeugen eines Gemisches aus Eisenerz und Schwelkoks A method for generating a mixture of iron ore and coke |
| 07/17/2002 | EP1124995B1 Direct-current arc furnace with central charging shaft for steel production and method of producing steel |
| 07/17/2002 | CN1358979A Method and equipment for discharging reduction products moving type siege furnace |
| 07/16/2002 | US6419724 Method for reducing iron oxides and for melting iron and installations therefor |
| 07/10/2002 | CN1087352C Method and apparatus for making metallic iron |
| 07/09/2002 | US6416728 Reducing, carburing raw material |
| 07/09/2002 | US6416566 Reducing ores |
| 07/04/2002 | US20020083794 Fine-particulate metal such as sponge iron; metal melt and slag layer floating on top of the metal melt; metal added with a supply means dipping into the slag layer and energy is added in the form of electric arcs. |
| 07/03/2002 | EP1029086B1 Method for producing a mixture of iron carbide and granular, directly reduced iron |
| 07/02/2002 | US6413471 Apparatus for producing reduced iron |
| 07/02/2002 | US6413295 Direct reduction of iron oxide with carbon to form high purity molten globules, cooling to form solid iron buttons; protective layer of vitreous iron oxide, carbon and silica compounds |