| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 06/25/2008 | CN100397018C Pelletizing shaft furnace with smooth descent and diversion functions |
| 06/25/2008 | CN100396797C Slag cleaning furnace top-blown immersion technology |
| 06/25/2008 | CN100396580C Method for introducing granular ore into roasting kiln |
| 06/12/2008 | WO2008009433A3 Method and apparatus for reducing metalliferous material to a reduction product |
| 06/11/2008 | EP1930678A2 Shaft furnace |
| 06/11/2008 | EP1930449A2 Shaft furnace |
| 06/11/2008 | EP1930448A2 Shaft furnace |
| 06/10/2008 | US7384450 Reducing and melting raw material of iron oxide-containing material and carbonaceous reducing agent; heating after a powder and granular atmosphere control carbonaceous material is spread on hearth of heat-reducing furnace; no resolidification of carbon; solid phase, efficiency, stability |
| 06/05/2008 | US20080127778 Feed powdery carbonaceous reducing agent, iron oxide and calcium oxide into moving-hearth reducing furnace; 30 kg or more per ton of carbonaceous to molten iron for effectively increasing the metallization ratio of solid reduced iron; magnesium oxide to suppress refractory wear |
| 06/04/2008 | EP1927580A1 Process for making iron powder or microalloyed steel powder from iron oxide powder by oxidation and reduction |
| 06/04/2008 | CN101194030A Forehearth |
| 06/04/2008 | CN101194029A Hot metal supply apparatus |
| 06/03/2008 | CA2198901C Method and apparatus for electric steelmaking |
| 05/29/2008 | WO2008063897A2 Multiple hearth furnace for reducing iron oxide |
| 05/29/2008 | CA2669314A1 Multiple hearth furnace for reducing iron oxide |
| 05/28/2008 | EP1925679A1 Method and device for calcinating solids or slurry |
| 05/28/2008 | CN101189349A Cold start-up method for a direct smelting process |
| 05/28/2008 | CN100390303C Method for producing metallic iron |
| 05/22/2008 | WO2008059739A1 Briquette iron by hot molding and process for producing the same |
| 05/22/2008 | WO2008059691A1 Process for production of granular metallic iron and equipment for the production |
| 05/22/2008 | WO2008020357A3 A method for the commercial production of iron |
| 05/22/2008 | CA2669796A1 Hot briquette iron and method for producing the same |
| 05/21/2008 | EP1781829A4 Apparatus for manufacturing compacted irons of reduced materials comprising fine direct reduced irons and apparatus for manufacturing molten irons using the same. |
| 05/21/2008 | EP1573076B1 An apparatus for manufacturing molten irons by hot compacting fine direct reduced irons and calcined additives and method using the same |
| 05/21/2008 | CN101184854A Method for pre-heating iron agglomerates |
| 05/14/2008 | EP1920075A1 Method for pre-heating iron agglomerates |
| 04/30/2008 | CN101168802A Method for synthetically reclaiming iron, vanadium and titanium from vanadium titanium magnet concentrate |
| 04/24/2008 | WO2008047979A1 Tuyere of melter-gasifier |
| 04/24/2008 | WO2008046504A1 Method and device for producing molten material |
| 04/24/2008 | WO2008046503A1 Method and device for producing molten material |
| 04/24/2008 | CA2665770A1 Method and device for producing molten material |
| 04/24/2008 | CA2665763A1 Method and device for producing molten material |
| 04/17/2008 | WO2007122509A3 Method and apparatus for producing direct reduced iron |
| 04/17/2008 | DE102006048601A1 Verfahren und Vorrichtung zur Herstellung von geschmolzenem Material Method and apparatus for producing molten material |
| 04/17/2008 | DE102006048600A1 Verfahren und Vorrichtung zur Herstellung von geschmolzenem Material Method and apparatus for producing molten material |
| 04/16/2008 | EP1604373A4 Method and apparatus for controling temperature uniformity of the burden in a direct reduction shaft furnace |
| 04/15/2008 | CA2288217C Method for thermal treatment of granulated iron ore before reduction |
| 04/10/2008 | WO2008042997A1 System and method for producing metallic iron |
| 04/10/2008 | WO2008042996A1 System and method of producing metallic iron |
| 04/10/2008 | CA2665562A1 System and method of producing metallic iron |
| 04/09/2008 | CN101158550A Kiln furnace for roasting particle ore |
| 04/09/2008 | CN101157961A Preparation method for producing low-grade ferroniobium by using ferroniobium concentrate |
| 04/03/2008 | WO2007134725A3 Process for recycling of steel industry iron-bearing by-products by treating pellets in direct reduction furnaces |
| 04/02/2008 | CN201043182Y Electrical heated equipment for direct reduction of sponge iron |
| 04/02/2008 | CN101153349A Technique for reverting ironmaking by comprehensive utilization of fusion of coal gas and small ore |
| 04/01/2008 | CA2332724C Apparatus for injecting solid particulate material into a vessel |
| 04/01/2008 | CA2228842C Reducing iron oxides in rotary hearth furnace |
| 03/27/2008 | WO2007134859A3 Process for recycling of steel industry iron-bearing by-products by treating pellets in direct reduction furnaces |
| 03/26/2008 | CN101151380A Method and system for producing metallic iron nuggets |
| 03/26/2008 | CN101148686A Technique for directly reducing iron by using tunnel vehicle bottom type fast reducing furnace |
| 03/26/2008 | CN100376694C Method for preparing ferrotitanium by molten titanium slag |
| 03/25/2008 | CA2324166C Cold bonded iron particulate pellets |
| 03/20/2008 | WO2007124870A3 Method for producing liquid pig iron or liquid steel intermediate products from fine-particled material containing iron oxide |
| 03/20/2008 | US20080069763 Method for manufacturing titanium oxide-containing slag |
| 03/19/2008 | EP1900828A1 Method for producing feed material for molten metal production |
| 03/19/2008 | EP1689892A4 An apparatus for manufacturing a molten iron directly using fine or lump coals and fine iron ores, the method thereof, the integrated steel mill using the same and the method thereof |
| 03/19/2008 | CN101144110A Method for directly producing ferrochromium from chrome ore powder and coal |
| 03/12/2008 | CN101139639A Technique for smelting nickel-cobalt-ferrum by nickel oxide ore through electrical furnace |
| 03/12/2008 | CN100374587C Method for reduction treatment of metal oxide or ironmaking waste, and method for concentration and/or recovery of zinc and/or lead |
| 03/11/2008 | CA2387343C Method for producing metallic iron |
| 03/11/2008 | CA2278620C Device for the controlled cooling of hot-briquetted directly reduced iron sponge |
| 03/05/2008 | CN101134985A Smelting-separating furnace iron-smelting method for coal radical metallized pellet reduction |
| 02/28/2008 | US20080047397 Process and Apparatus for Producing Metals and/or Primaryh Metal Products |
| 02/27/2008 | CN101133169A Method and system for producing metallic iron nuggets |
| 02/21/2008 | WO2006039744A3 Electric arc furnace steelmaking |
| 02/21/2008 | CA2659559A1 A method for the commercial production of iron |
| 02/20/2008 | EP1888791A1 Forehearth |
| 02/20/2008 | CN101128714A Electric arc furnace |
| 02/20/2008 | CN101128607A Method and equipment for producing metal and/or metal semi-finished product |
| 02/20/2008 | CN101126112A Method and device for reducing metallized pellet by using high-purity water gas in pure oxygen shaft furnace |
| 02/20/2008 | CN101126111A Ilmenite reduction method for preparing solder rod |
| 02/14/2008 | WO2008018807A1 Electrode system |
| 02/14/2008 | WO2008018774A1 Apparatus for manufacturing molten irons and method for manufacturing molten irons using the same |
| 02/13/2008 | CN101121950A Tube furnace-shaft furnace twin coal-base fusing reduction iron-smelting method |
| 02/13/2008 | CN101121551A Sphere sponge iron used for treating water and preparation method thereof |
| 02/12/2008 | CA2366290C A method and apparatus for reducing a feed material in a rotary hearth furnace |
| 02/06/2008 | CN201016117Y Rotary hearth furnace tore material evenly arranging device |
| 02/06/2008 | CN101117650A Method for fusion deacidizing quick-predeacidized trickle iron ore powder |
| 02/06/2008 | CN100366757C Process and plant for reducing solids containing iron oxide |
| 01/31/2008 | WO2008014397A1 Method and system for producing metallic iron nuggets |
| 01/31/2008 | CA2658897A1 Method and system for producing metallic iron nuggets |
| 01/30/2008 | CN201012927Y Rotary hearth furnace with annular hearth |
| 01/24/2008 | WO2008009433A2 Method and apparatus for reducing metalliferous material to a reduction product |
| 01/24/2008 | US20080017085 Vertical Shaft Melting Furnace |
| 01/24/2008 | CA2658524A1 Method and apparatus for reducing metalliferous material to a reduction product |
| 01/23/2008 | CN101109027A Method for producing ball iron with iron scale |
| 01/23/2008 | CN100363508C Electric furnace to converter steel making production process |
| 01/22/2008 | CA2261140C Metal reduction and melting process |
| 01/17/2008 | WO2008007387A1 A dust recycling system for enhanced availability of corex |
| 01/16/2008 | EP1877714A1 Reduction furnace |
| 01/16/2008 | EP1340822B1 Method for operating rotary hearth type reducing furnace and rotary hearth type reducing furnace facilities |
| 01/16/2008 | CN101104873A Method for fusing reducing iron by employing iron ore hot pressing carbon-containing agglomerate |
| 01/10/2008 | US20080006973 Metal Scrap Submergence Apparatus |
| 01/09/2008 | EP1458895B1 Method and device for treating a fine-particled feedstock especially containing metal |
| 01/09/2008 | CN101100701A Method and device for producing sponge iron by using reducing gas prepared from coke oven gas |
| 01/09/2008 | CN100360689C Process and apparatus for automatically controlling slag foaming |
| 01/09/2008 | CN100360688C Direct smelting method and equipment |
| 01/08/2008 | CA2462571C Rotary hearth furnace and screw thereof for discharging reduced iron |
| 01/03/2008 | WO2008000608A1 Method and furnace for melting steel scrap |
| 01/03/2008 | WO2006107332A3 Linear hearth furnace system and methods regarding same |