| Patents for C21B 11 - Making pig-iron other than in blast furnaces (2,381) |
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| 12/01/1999 | CN1046960C Process and apparatus for producing molten pig iron |
| 11/30/1999 | US5993510 Process for working up combustion residues |
| 11/24/1999 | EP0958385A1 Method of agglomerating oil-containing steel mill waste |
| 11/23/1999 | US5989309 Utilizing discharge gas (reducing gas) from melter gasifier as lower temperature carrier gas for pre-reduced fine iron ore without the need for any other carrier gas |
| 11/23/1999 | US5989308 Including a direct-reduction shaft furnace for processing lumpy iron ore and a fluidized bed reactor for processing fine ore |
| 11/23/1999 | US5989307 Smelting iron oxide with coal and oxygen gas within blast furnace plant converted by replacing furnace with smelter vessel while utilizing original casting house, gas discharge means, cooling water supply system, storage bins for ore/coal |
| 11/09/1999 | US5980606 Charging smelter with source of iron oxide, carbonaceous fuel, and source of zinc; blowing oxygen into layer of foaming slag; reducing iron oxide; releasing effluents and precipitating sulfuric content as solid zinc sulfide |
| 11/03/1999 | EP0953058A1 Production method of metallic iron |
| 11/03/1999 | CN1046138C Equipment for producing molten pig iron by direct reduction |
| 10/20/1999 | CN2344402Y Laying-off equipment for rotary kiln |
| 10/19/1999 | US5968448 Process and apparatus for producing molten pig iron |
| 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 |
| 09/15/1999 | EP0655084B1 Improved molten metal decomposition apparatus and process |
| 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 | CN2337155Y Iron-melting furnace |
| 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 | US5946340 Concurrent injection of coke and raw materials |
| 08/31/1999 | US5944871 Melting, gasification of fine iron particles |
| 08/31/1999 | US5944870 Method of manufacturing pig iron or steel and cement clinker from slags |
| 08/18/1999 | EP0657710B1 Dc arc furnace |
| 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 |
| 08/04/1999 | EP0933436A1 Installation and process for melting of direct-reduced iron |
| 08/03/1999 | CA2030252C Method of and apparatus for continuously discharging molten metal and slag |
| 07/28/1999 | CN1224064A Apparatus and process system for preheating of steel scrap for melting metallurgical furnaces with concurrent flow of scrap and heating gases |
| 07/28/1999 | CN1044386C Method for intensifying reaction in metallurgical reaction vessels |
| 07/22/1999 | WO1999036581A1 Sustainable steelmaking by efficient direct reduction of iron oxide and solid waste minimisation |
| 07/06/1999 | US5919281 Efficient separation of particle sizes |
| 06/16/1999 | CN1219596A Plant and process for producing raw iron and/or sponge iron |
| 06/15/1999 | US5912916 Electric furnace with insulated electrodes and process for producing molten metals |
| 06/10/1999 | WO1999028513A1 Device and process system for preheating steel scrap |
| 06/10/1999 | WO1999028512A1 Method for reducing iron oxides and smelting iron and installations therefor |
| 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 | CN1219207A Metal containing compound reduction and melting process |
| 06/02/1999 | EP0862657A4 Duplex procedure for the production of metals and metal alloys from oxidic metal ores |
| 05/26/1999 | CN1217753A Multen reduction apparatus and method for operating same |
| 05/17/1999 | CA2250946A1 Reduction of iron ore in ore/coal mixtures |
| 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 | EP0914474A1 Metal reduction and melting process |
| 05/11/1999 | US5902375 Method of melting tinned iron scrap |
| 05/05/1999 | CN1043244C Method for production of pig iron or steel and cement clinker from slag |
| 04/29/1999 | WO1999020966A1 Structure of metallurgical furnace and operating method using the same metallurgical furnace |
| 04/27/1999 | US5897829 Apparatus for reducing fine iron ore |
| 04/14/1999 | CN1042954C Process for producing raw or and iron sponge and its equipment |
| 04/08/1999 | WO1999016911A1 Direct smelting process for producing metals from metal oxides |
| 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 |
| 03/23/1999 | US5885328 Method of agglomerating oil-containing steel mill waste |
| 03/16/1999 | US5882374 Process for producing foundry iron with an insulated electrode |
| 03/03/1999 | EP0899345A1 Reduced iron manufacturing method and apparatus |
| 03/03/1999 | CN1209845A Reduced iron mfg. method and apparatus |
| 03/03/1999 | CN1042351C Method for preparing ferro-phosphorus from corundum slag |
| 03/03/1999 | CN1042347C 生产铁的方法 Production of iron approach |
| 02/23/1999 | CA2135496C Dc arc furnace |
| 02/17/1999 | EP0896636A1 Smelting-reduction apparatus, and method for producing molten pig iron using the smelting reduction apparatus |
| 02/17/1999 | CN1042141C Metallurgical processes and apparatus |
| 02/03/1999 | CN1041944C Iron-bath molten reduction method |
| 01/21/1999 | WO1999002739A1 Method for controlling a smelting reduction process |
| 01/20/1999 | CN1205743A Duplex procedure for prodn. of metals and metal alloys from oxidic metal ores |
| 01/07/1999 | DE19729624A1 Furnace for thermal treatment of raw material e.g. iron |
| 12/23/1998 | WO1998058091A1 Process and plant for producing iron smelt in an electric arc furnace by using agglomerated, iron-containing steel work residues |
| 12/15/1998 | CA2014308C Method and apparatus for the direct reduction of iron |
| 12/09/1998 | EP0882142A1 Process for producing liquid pig iron or semifinished steel products from iron-containing materials |
| 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 |
| 11/25/1998 | EP0632841B1 Process for producing pig iron and cement clinker |
| 11/18/1998 | CN1040774C Method and apparatus for production of iron from ion oxides |
| 11/04/1998 | EP0805786B1 Method of utilizing dusts produced during the reduction of iron ore |
| 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 | 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 |
| 10/21/1998 | EP0871781A1 Process for producing foundry iron |
| 10/14/1998 | CN1195705A Method of producing foamy slag layer in electric arc furnace |
| 10/14/1998 | CN1040231C Method and apparatus for directly deoxidation of powder mineral or fine mineral sand |
| 10/14/1998 | CN1040229C Process for producing pig iron and cement clinker |
| 10/06/1998 | US5817164 Method and apparatus for making feedstock for steel making |
| 09/30/1998 | EP0819182A4 A method of producing metals and metal alloys |
| 09/23/1998 | EP0865506A1 Process for producing liquid metal and facilities for carrying out the process |
| 09/16/1998 | EP0864658A1 Refining iron ore |
| 09/16/1998 | CN1039830C Method for producing reducible iron-contaiing material having less clustering during direct reduction and products thereof |
| 09/16/1998 | CN1039829C Process for direct reduction of iron-oxide containing materials with solid carbonaceous reducing agents |
| 09/09/1998 | EP0862657A1 Duplex procedure for the production of metals and metal alloys from oxidic metal ores |
| 09/01/1998 | US5802098 Melting vessel with fastening, mounting and tilting devices |
| 09/01/1998 | US5800592 Process for producing molten pig iron with melting cyclone |
| 08/19/1998 | CN1190995A Processfor producing liquid pig iron or intermediate steel products and installation for implementing it |
| 08/12/1998 | EP0857792A1 Electric arc furnace slag foaming |
| 08/12/1998 | EP0787215B1 Process for producing liquid ray iron or steel basic products and iron sponge and plant for implementing it |
| 08/11/1998 | CA2006253C Pre-reduced iron oxide |
| 08/05/1998 | EP0787214B1 Plant and process for producing raw iron and/or sponge iron |
| 07/30/1998 | WO1998032883A1 Refractory wall, metallurgical vessel comprising such a refractory wall and method in which such a refractory wall is applied |
| 07/28/1998 | US5785733 Apparatus including drying/preheating furnace and reducing furnace, each having smoothly tapered shape and connected to cyclone which captures iron ore dust for recycling and discharges cleaned exhaust gas |
| 07/15/1998 | EP0755736A4 Improvements in metallurgical conversion |