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Class Information
Number: 75/503
Name: Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures > Processes > Producing or treating free metal > At 300 degrees c or greater (e.g., pyrometallurgy, etc.) > Iron(fe) > Reduction in presence of solid carbon(c) containing material (e.g., coke, coal, carbides, etc.)
Description: Process wherein an Iron (Fe) compound is reduced to metallic Iron in the presence of a solid containing Carbon. The Carbon may be either in elemental (e.g., coke, coal, etc.) or combined (e.g., carbide, etc.) form.

Sub-classes under this class:

Class Number Class Name Patents
75/504 Including consolidation of solid carbon(c) containing material with reducible iron(fe) compound 47

Patents under this class:
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Patent Number Title Of Patent Date Issued
8632622 Process and device for producing pig iron or liquid steel precursors Jan. 21, 2014
8557014 Method for making liquid iron and steel Oct. 15, 2013
8540951 Process for extracting metals from aluminoferrous titanoferrous ores and residues Sep. 24, 2013
8470068 Method and system for producing metallic iron nuggets Jun. 25, 2013
8377169 Method and apparatus for manufacturing granular metallic iron Feb. 19, 2013
8287621 Use of bimodal carbon distribution in compacts for producing metallic iron nodules Oct. 16, 2012
8262766 Method for reducing chromium containing raw material Sep. 11, 2012
8177880 System and method of producing metallic iron May. 15, 2012
8097065 System and method for producing metallic iron Jan. 17, 2012
8088195 Method for manufacturing titanium oxide-containing slag Jan. 3, 2012
8025711 System and method for producing metallic iron Sep. 27, 2011
7914601 Cold start-up method for a direct smelting process Mar. 29, 2011
7846235 Method for producing metallic iron Dec. 7, 2010
7806959 Metallic iron nuggets Oct. 5, 2010
7695544 Method and system for producing metallic iron nuggets Apr. 13, 2010
7662210 Apparatus for manufacturing molten irons by injecting fine coals into a melter-gasifier and the method using the same Feb. 16, 2010
7628839 Method and system for producing metallic iron nuggets Dec. 8, 2009
7384450 Method for producing metallic iron Jun. 10, 2008
7198658 Method for producing feed material for molten metal production and method for producing molten metal Apr. 3, 2007
7037356 Method for operating rotary hearth type reducing furnace and rotary hearth type reducing furnace facilities May. 2, 2006
6802886 Method of producing a metallized briquette Oct. 12, 2004
6797034 Method of producing reduced metals and apparatus for reducing metal oxides Sep. 28, 2004
6630010 Method of producing metallic iron Oct. 7, 2003
6605130 Pellets incorporated with carbonaceous material Aug. 12, 2003
6592648 Reduction of iron ore in ore/coal mixtures Jul. 15, 2003
6506231 Method and apparatus for making metallic iron Jan. 14, 2003
6423116 Method for extracting iron by direct reduction Jul. 23, 2002
6409790 Method and apparatus for practicing carbonaceous-based metallurgy Jun. 25, 2002
6395057 Method for producing directly reduced iron in a layered furnace May. 28, 2002
6355088 Method for direct reduction and upgrading of fine-grained refractory and earthy iron ores and slags Mar. 12, 2002
6284017 Method and facility for producing reduced iron Sep. 4, 2001
6277171 Method of reducing the iron content of steel slag Aug. 21, 2001
6248152 Method of reducing iron oxide on a movable hearth furnace Jun. 19, 2001
6241804 Process for producing iron briquettes and/or cold iron sponge Jun. 5, 2001
6214085 Method for direct steelmaking Apr. 10, 2001
6129777 Method of producing reduced iron agglomerates Oct. 10, 2000
6051048 Production of fuel gas Apr. 18, 2000
6048382 Method for direct reduction and upgrading of fine-grained refractory and earthy iron ores and slags Apr. 11, 2000
6036744 Method and apparatus for making metallic iron Mar. 14, 2000
5997606 Production of titanium slag Dec. 7, 1999
5980607 Steelmaking method with oxygen from rectification of air Nov. 9, 1999
5922261 Process for recovering iron from iron-rich material Jul. 13, 1999
5873924 Desulfurizing mix and method for desulfurizing molten iron Feb. 23, 1999
5785737 Method for recycling iron bearing sludges in a steelmaking operation Jul. 28, 1998
5755853 Process for the treatment of solid residues containing metals, in particular residues from the cleaning of household garbage incineration smoke May. 26, 1998
5702502 Method for direct use of chromite ore in the production of stainless steel Dec. 30, 1997
5660805 Method for beneficiating titanium-bearing material containing iron Aug. 26, 1997
5637133 Process for manufacturing sponge iron with low sulphur content Jun. 10, 1997
5589118 Process for recovering iron from iron-containing material Dec. 31, 1996
5486229 Raw material for producing ferrite dust for friction elements and method of reducing the same Jan. 23, 1996

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