C21B - Manufacture of iron or steel

More topics under "C21B - Manufacture of iron or steel" (26,092)
C21B 11 - Making pig-iron other than in blast furnaces (2,381)
C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991)
C21B 15 - Other processes for the manufacture of iron from iron compounds (585)
C21B 3 - General features in the manufacture of pig-iron (3,260)
C21B 5 - Making pig-iron in the blast furnace (3,135)
C21B 7 - Blast furnaces (8,339)
C21B 9 - Stoves for heating the blast in blast furnaces (1,401)

Patents for C21B - Manufacture of iron or steel (67)
06/2014
06/17/2014	CA2515219C Fine-grained martensitic stainless steel and method thereof
08/2012
08/21/2012	US8246716 Method in connection with steel production
06/2012
06/06/2012	EP1597404B1 Fine-grained martensitic stainless steel and method thereof
02/2012
02/01/2012	CN1938434B 与钢生产有关的方法 Relating to the production method of the steel
10/2011
10/18/2011	US8038930 Cooling element and method for manufacturing the same
11/2010
11/04/2010	US20100275728 Method in connection with steel production
09/2010
09/01/2010	CN101322003B Cooling element and method for manufacturing the same
06/2010
06/29/2010	US7744674 Producing a fluxing agent used in production of stainless steel by using a hydroxide sludge that from the neutralization of metal-contaminated, steel pickling liquid and contains fluoride-containing compound(s); calcining the sludge; decarburizing a steel heat to form a slag on top and adding a flux
09/2009
09/09/2009	EP1954999B1 Cooling element and method for manufacturing the same
12/2008
12/10/2008	CN101322003A Cooling element and method for manufacturing the same
11/2008
11/06/2008	US20080272525 Cooling Element and Method for Manufacturing the Same
10/2008
10/16/2008	WO2005098054A9 Method in connection with steel production
08/2008
08/13/2008	EP1954999A1 Cooling element and method for manufacturing the same
02/2008
02/05/2008	CA2360211C Installation for aqueous granulation
09/2007
09/20/2007	US20070215249 Method in Connection with Steel Production
06/2007
06/07/2007	WO2007063164A1 Cooling element and method for manufacturing the same
03/2007
03/28/2007	CN1938434A Method in connection with steel production
12/2006
12/20/2006	EP1733061A1 Method in connection with steel production
11/2006
11/14/2006	CA2259092C Cooling plate for shaft furnaces
08/2006
08/16/2006	EP1644540A4 Nano-precipitation strengthened ultra-high strength corrosion resistant structural steels
05/2006
05/17/2006	EP1597404A4 Fine-grained martensitic stainless steel and method thereof
04/2006
04/12/2006	EP1644540A2 Nano-precipitation strengthened ultra-high strength corrosion resistant structural steels
04/06/2006	WO2004108970A3 Nano-precipitation strengthened ultra-high strength corrosion resistant structural steels
01/2006
01/05/2006	WO2005098054A8 Method in connection with steel production
11/2005
11/24/2005	WO2005110646A1 Sliding gate for controlling the flow of molten metal
11/23/2005	EP1597404A2 Fine-grained martensitic stainless steel and method thereof
10/2005
10/20/2005	WO2005098054A1 Method in connection with steel production
10/05/2005	CN1221669C Method for prodn. of reduction iron
05/2005
05/10/2005	US6890393 Thermal mechanical treatment and strengthened with a uniform dispersion of coarsening resistant; iron based
12/2004
12/16/2004	WO2004108970A2 Nano-precipitation strengthened ultra-high strength corrosion resistant structural steels
12/16/2004	CA2528165A1 Nano-precipitation strengthened ultra-high strength corrosion resistant structural steels
11/2004
11/03/2004	CN1174207C Shaft furnace cooling plate
10/2004
10/20/2004	CN1171666C Installation for aqueous granulation
10/14/2004	WO2004072308A3 Fine-grained martensitic stainless steel and method thereof
08/2004
08/26/2004	WO2004072308A2 Fine-grained martensitic stainless steel and method thereof
08/26/2004	CA2515219A1 Fine-grained martensitic stainless steel and method thereof
08/12/2004	US20040154707 Heat treatment, hot rolling, cooling, tempering; microstructure
08/2003
08/26/2003	US6610243 Installation for aqueous granulation
09/2002
09/17/2002	US6451085 Agglomeration of powder mixture
03/2002
03/06/2002	CN1338974A Installation for aqueous granulation
10/2001
10/18/2001	US20010030389 Apparatus for producing reduced iron
03/2001
03/21/2001	CN1288066A Method and equipment for prodn. of reduction iron
01/2001
01/23/2001	CA2050566C Cold reduced non-aging deep drawing steel and method for producing
11/2000
11/07/2000	US6144689 Cooling plate for shaft furnaces
08/2000
08/17/2000	WO2000047316A1 Installation for aqueous granulation
08/1999
08/04/1999	CN1224829A Shaft furnace cooling plate
07/1999
07/21/1999	EP0930371A1 Stove cooler for shaft furnaces
08/1996
08/20/1996	CA2024466C Method of operating in-bath smelting reduction furnace
04/1995
04/19/1995	CN1101675A Continuous reduction of metals and/or metal oxides
10/1992
10/28/1992	CN1018855B Power unit control method and power unit control system
01/1992
01/07/1992	US5078785 Monitoring and controlling slag density in steelmaking, monitoring carbon content of slag
03/1991
03/27/1991	EP0418627A1 Method of operating in-bath smelting reduction furnace
06/1990
06/20/1990	CN1043193A Power unit control method and power unit control system
08/1989
08/01/1989	CA1258064A1 Rock bit with improved extended nozzle
01/1987
01/31/1987	CN85101709A Method and plant for reducing oxidic material while simultaneously generating a gas suitable as fuel gas
01/27/1987	CA1217059A1 Production of liquid iron
09/1986
09/16/1986	USRE32247 Process for the direct production of steel
03/1985
03/27/1985	EP0134852A1 Production of liquid iron
04/1982
04/27/1982	CA1122415A1 Synthetic flux for steel slag
03/1981
03/24/1981	CA1097949A1 High corrosion resistant and high strength medium cr and low ni stainless cast steel
01/1981
01/20/1981	CA1094010A1 Treating-thin tin-plated steel with chromic acid or sodium dichromate
09/1980
09/23/1980	US4224061 Acid resistance
10/1979
10/02/1979	CA1063347A1 Apparatus for cleaning blast-furnace exhaust gases
03/1979
03/20/1979	US4145263 Steel sheet useful in forming foodstuff and beverage cans
10/1977
10/11/1977	US4053301 Process for the direct production of steel
10/04/1977	US4052042 Apparatus for cleaning blast-furnace exhaust gases
07/1976
07/13/1976	US3969162 Method of producing silicon steel strip