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Class Information
Number: 75/502
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 molten state > Gas injection over surface of melt (e.g., as in reverberatory furnace, etc.)
Description: Process wherein gas is passed over the surface of the melt.










Patents under this class:
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Patent Number Title Of Patent Date Issued
7568681 Apparatus for injecting gas into a vessel Aug. 4, 2009
7160353 Process for producing molten iron Jan. 9, 2007
6989042 Direct smelting process and apparatus Jan. 24, 2006
6939391 Direct smelting process and apparatus Sep. 6, 2005
6626977 Direct smelting process and apparatus Sep. 30, 2003
6547847 Continuous process for transforming material, yielding controlled composition products and apparatus apt to carry out such process Apr. 15, 2003
6482249 Direct smelting process Nov. 19, 2002
6478848 Direct smelting process Nov. 12, 2002
6440195 Process and an apparatus for producing metals and metal alloys Aug. 27, 2002
6423115 Direct smelting process Jul. 23, 2002
6409790 Method and apparatus for practicing carbonaceous-based metallurgy Jun. 25, 2002
6402808 Direct smelting process Jun. 11, 2002
6387153 Stable idle procedure May. 14, 2002
6379422 Direct smelting process Apr. 30, 2002
6379424 Direct smelting apparatus and process Apr. 30, 2002
6368548 Direct smelting process and apparatus Apr. 9, 2002
6352574 Process for direct production of cast iron from fine iron ore and fine coal Mar. 5, 2002
6332910 Process for working up steel slags and iron carriers for obtaining pig iron and environmentally safe slags Dec. 25, 2001
6277172 Method of charging metal carriers to a melt-down gasifying zone Aug. 21, 2001
6267799 Method of producing metals and metal alloys Jul. 31, 2001
6258148 Method of charging metal carriers to a melt-down gasifying zone Jul. 10, 2001
6214085 Method for direct steelmaking Apr. 10, 2001
6214084 Iron manufacturing process Apr. 10, 2001
6197088 Producing liquid iron having a low sulfur content Mar. 6, 2001
6193781 Method of smelting iron ore Feb. 27, 2001
6171364 Method for stable operation of a smelter reactor Jan. 9, 2001
6143054 Process of producing molten metals Nov. 7, 2000
6083296 Method of producing metals and metal alloys Jul. 4, 2000
6001148 Process for obtaining metal from metal oxide Dec. 14, 1999
5989309 Method for injecting fine iron ore in smelting reducing process Nov. 23, 1999
5980606 Method for reducing sulfuric content in the offgas of an iron smelting process Nov. 9, 1999
5891214 Smelting reduction method with increased effectiveness Apr. 6, 1999
5885322 Method for reducing iron losses in an iron smelting process Mar. 23, 1999
5830259 Preventing skull accumulation on a steelmaking lance Nov. 3, 1998
5800592 Process for producing molten pig iron with melting cyclone Sep. 1, 1998
5647888 Process for producing metals and metal alloys in a smelt reduction vessel Jul. 15, 1997
5607495 Oxygen smelting of copper or nickel sulfides Mar. 4, 1997
5518523 Converter process for the production of iron May. 21, 1996
5489325 Process for producing metals and metal alloys in a smelt reduction vessel Feb. 6, 1996
5480474 Process and apparatus for smelting reduction of ores or pre-reduced metal carriers Jan. 2, 1996
5472478 Reduction of metal oxides and vessel Dec. 5, 1995
5466278 Process for the manufacture of steel Nov. 14, 1995
5378260 Two-zone countercurrent smelter system and process Jan. 3, 1995
5302184 Manufacture of ferroalloys using a molten bath reactor Apr. 12, 1994
5286273 Method for steel making in high temperature reactor Feb. 15, 1994
5135572 Method for in-bath smelting reduction of metals Aug. 4, 1992
5051127 Process for post combustion Sep. 24, 1991
5000784 Method for smelting reduction of iron ore Mar. 19, 1991
4995906 Method for smelting reduction of iron ore Feb. 26, 1991
4985068 Method and apparatus for smelting iron oxide Jan. 15, 1991

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