| Patents for C21B 13 - Making spongy iron or liquid steel, by direct processes (6,991) |
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| 10/04/1983 | US4407864 Process for treating iron sponge |
| 10/04/1983 | US4407489 Apparatus for discharging hot flowable solids from an upright container, particularly for discharging sponge iron from a shaft furnace |
| 09/28/1983 | EP0089701A1 Process for the direct reduction of matter containing iron oxide to spongy iron in a rotary kiln |
| 09/27/1983 | US4406695 Process for producing alloy steel product or iron powder by furnacing ground iron or molten iron on a molten lead bath |
| 09/27/1983 | CA1154263A1 Process for operating a blast furnace |
| 09/27/1983 | CA1154262A1 Method and apparatus for manufacturing sponge iron |
| 09/27/1983 | CA1154261A1 Method of producing direct reduced iron with fluid bed coal gasification |
| 09/21/1983 | EP0089075A1 Method of burning the combustible constituents in the waste gases of rotary furnaces |
| 09/20/1983 | US4405362 Iron ore direct reduction waste treatment |
| 09/13/1983 | CA1153559A1 Method for the gaseous reduction of metal ores using reducing gas produced by gasification of solid or liquid fossil fuels |
| 09/13/1983 | CA1153558A1 Method of using a methane-containing gas for reducing iron ore |
| 08/31/1983 | EP0087405A1 Process and device for the reduction of particle-sized ores containing oxide |
| 08/31/1983 | EP0087353A1 Process for executing metallurgical reductions and product used therefor |
| 08/30/1983 | CA1152750A1 Method and apparatus for direct reduction of iron using high sulfur gas |
| 08/30/1983 | CA1152749A1 Method of making sponge iron |
| 08/23/1983 | US4399983 Apparatus for the production of liquid iron, especially for directly producing liquid iron from ore |
| 08/16/1983 | US4398945 Process for producing a ferronickel alloy from nickel bearing laterites |
| 08/16/1983 | US4398876 Hot-briquetting apparatus for reduced iron |
| 08/16/1983 | CA1151879A1 Method and apparatus for manufacturing sponge iron |
| 08/10/1983 | EP0085443A2 Device for removing close-grained directly reduced iron from cooling gases |
| 08/10/1983 | EP0085153A1 Process for gas production and metal recovery in a molten bath reactor, particularly in a molten iron bath |
| 08/02/1983 | US4396424 Utilizing heat obtained by reoxidizing the ferrous oxide |
| 08/02/1983 | US4396423 Carbiding iron |
| 08/02/1983 | US4396421 Low-energy input by using plasma arcs to heat fluidized bed |
| 07/27/1983 | EP0084288A1 Method and apparatus for the direct production of liquid iron |
| 07/26/1983 | CA1150518A1 Recovering non-volatile metals from dust containing metal oxides |
| 07/26/1983 | CA1150504A1 Method for firing a rotary kiln with pulverized solid fuel |
| 07/19/1983 | US4394163 Reduction, electric arcs |
| 07/19/1983 | US4394162 Alloying, benefication |
| 07/05/1983 | CA1149176A1 Method for carburizing sponge iron |
| 07/05/1983 | CA1149175A1 Recovery of steel from high phosphorous iron ores |
| 06/28/1983 | US4390773 Contact electrode for melting and heating furnaces with DC plasma heating |
| 06/28/1983 | CA1148745A1 Method and apparatus for producing molten iron from iron oxide with coal and oxygen |
| 06/28/1983 | CA1148744A1 Impact bed gasifier-melter |
| 06/21/1983 | US4389242 Interior arrangement for direct reduction rotary kilns and method |
| 06/15/1983 | EP0081475A2 Apparatus for discharging material at a high temperature from a vessel, especially sponge iron from a shaft furnace |
| 06/14/1983 | US4388116 Passivation of sponge iron |
| 06/14/1983 | US4387654 Method for firing a rotary kiln with pulverized solid fuel |
| 06/14/1983 | CA1147965A1 Process of directly reducing iron oxide-containing materials in a rotary kiln |
| 06/14/1983 | CA1147964A1 Process for reducing spent gas generated in the production of sponge iron |
| 05/31/1983 | US4386061 Method of treating pyrite bearing polymetallic material |
| 05/31/1983 | US4386057 Reacting magnetic fly ash with alkali to precipitate aluminosilicate hydrate salts soluble with mineral acid |
| 05/24/1983 | US4384886 Process for zinc removal from oxide-containing iron sources |
| 05/24/1983 | US4384883 Reduction of ferrotitaniferous materials |
| 05/24/1983 | CA1146759A1 Method of manufacturing stainless steel |
| 05/24/1983 | CA1146754A1 Process of producing reducing gas from solid fuels |
| 05/18/1983 | EP0079182A1 Improvements in or relating to the production of steel |
| 05/03/1983 | US4381939 Method for selective reduction of metallic oxides |
| 04/28/1983 | WO1983001461A1 Process for the production of ferrochromium |
| 04/19/1983 | US4380469 Gasification coal |
| 04/19/1983 | US4380328 Shaft furnace for reducing ores |
| 04/05/1983 | CA1144104A1 Treatment of matter in low temperature plasmas |
| 03/29/1983 | US4378244 System for coal injection in iron oxide reducing kilns |
| 03/29/1983 | US4378243 Process control for distribution of reducing agent using low pressure air in pipe |
| 03/29/1983 | US4378241 Method for achieving low sulfur levels in the DRI product from iron oxide reducing kilns |
| 03/29/1983 | CA1143574A1 Method and apparatus for the secondary gaseous reduction of metal ores |
| 03/29/1983 | CA1143571A1 Method and apparatus for separating insufficiently cooled metal sponge particles from a mass of such particles |
| 03/29/1983 | CA1143556A1 System for recycling char in iron oxide reducing kilns |
| 03/15/1983 | US4376648 Process for producing reduced iron |
| 03/08/1983 | US4376280 Instrument system for iron oxide reducing kilns |
| 03/08/1983 | US4376139 Process for treating metallic starting materials for smelting plants, particularly iron sponge particles |
| 03/08/1983 | US4375983 Method of making sponge metal |
| 03/08/1983 | US4375883 System for recycling char in iron oxide reducing kilns |
| 02/23/1983 | EP0072457A2 Process and apparatus for producing synthesis gas |
| 02/22/1983 | US4374663 Method and apparatus for reducing an iron oxide material in a fluidized bed |
| 02/22/1983 | US4374585 Apparatus for the direct reduction of iron ores |
| 02/22/1983 | CA1141549A1 Production for reducing gas for furnace injection |
| 02/15/1983 | CA1141167A1 Method and apparatus for reducing iron oxide to molten iron with solid reductant and oxy-fuel burners |
| 02/15/1983 | CA1141166A1 Steelmaking process |
| 02/15/1983 | CA1141165A1 Integrated process for thermal cracking of heavy oil and reduction or iron ores |
| 02/15/1983 | CA1141164A1 Process of briquetting sponge iron-containing material |
| 02/08/1983 | CA1140750A1 Shaft for the heat treatment of material, for example for melting ore concentrate |
| 01/25/1983 | US4370162 Metal ore reduction with carbon monoxide and hydrogen, catalytic hydrocarbon reforming to reducing gas, heat exchanging |
| 01/25/1983 | US4370161 Convering formed calcium sulfide to calcium hydroxide and hydrogensulfide |
| 01/18/1983 | US4369062 In steelmaking |
| 01/18/1983 | US4369059 Process of directly reducing iron oxide containing materials in a rotary kiln |
| 12/28/1982 | US4365789 Apparatus for the direct reduction of iron in a shaft furnace using gas from coal |
| 12/14/1982 | US4363654 Production of reducing gas for furnace injection |
| 12/14/1982 | US4363473 Apparatus for reducing iron ore or the like |
| 12/07/1982 | US4362555 Method and apparatus for manufacturing sponge iron |
| 12/07/1982 | US4362554 Method and apparatus for manufacturing sponge iron |
| 11/30/1982 | US4361441 Treatment of matter in low temperature plasmas |
| 11/30/1982 | CA1136420A1 Process for producing metallized iron pellets |
| 11/23/1982 | US4360378 Direct reduction of iron oxide containing material with biofuel |
| 11/16/1982 | US4359212 Apparatus for reducing finely divided iron oxide material |
| 11/09/1982 | US4358310 Dry collection of metallized fines |
| 11/09/1982 | CA1135060A1 Method for removing sulfur oxides from hot exhaust gases produced during manufacture of reduced iron pellets |
| 11/03/1982 | EP0063924A2 Methods for melting and refining a powdery ore containing metal oxides and apparatuses for melt-refining said ore |
| 10/27/1982 | EP0063532A1 Method and process for the instantaneous production of liquid iron |
| 10/26/1982 | US4356031 Of ores or other materials containing iron oxides |
| 10/05/1982 | CA1132800A1 Process and apparatus for producing liquid crude iron and reduction gas |
| 09/30/1982 | WO1982003229A1 Method and furnace for making spongy iron |
| 09/28/1982 | US4351513 Direct reduction of iron using coke oven gas |
| 09/21/1982 | CA1131915A1 Method and apparatus for the production of steel from iron-ore dust by direct reduction |
| 09/14/1982 | US4348910 Sponge iron products sampling device |
| 09/07/1982 | US4348226 With reducing gas obtained by reforming carbon dioxide and water with methane |
| 09/07/1982 | US4348225 Batch process and static-bed type apparatus for reducing iron ore |
| 08/31/1982 | CA1130568A1 Method for producing low-carbon steels from iron ores containing vanadium and/or titanium |
| 08/18/1982 | EP0057706A1 Reduction of ferrotitaniferous materials. |
| 08/10/1982 | US4343624 Iron-steam process |