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| Number | Title | Issue Date |
| 6221126 | Arrangement and process for the reduction of metal-oxide-bearing material Arrangement for the reduction of metal-oxide-bearing material, particularly of, iron ore, with a reduction vessel in which the metal-oxide-bearing material is reduced in counterflow with reduction gas and which is provided with an inlet for metal-oxide-be... | 04/24/2001 |
| 6214084 | Iron manufacturing process Iron ore is reduced to molten iron by introducing the ore into a reactor while combusting coal with pure oxygen in the reactor. The molten iron phase, which forms at the bottom of the reactor, is stirred by injecting carbon monoxide into the molten iron. ... | 04/10/2001 |
| 5407460 | Method for improving quality of reforming gas used in the direct reduction of metal oxides A method for modifying existing direct reduction processes and retrofitting existing direct reduction facilities so as to increase the capacity of the facilities without the need for increasing the capacity of external reformers associated with the existi... | 04/18/1995 |
| 4370161 | Ore reduction using calcium oxide desulfurization A process and apparatus for producing a low sulfur content hot reducing gas by desulfurizing hot reducing gas by contacting the sulfur-bearing hot reducing gas or carbonaceous material with a particulate calcium oxide desulfurizing agent to thereby produc... | 01/25/1983 |
| 4216011 | Method and apparatus for the secondary gaseous reduction of metal ores A method and apparatus are disclosed for achieving improved reduction efficiency and thermal economy in the reduction of particulate metal ores, e.g., iron ore, in a vertical shaft, moving bed reactor. The reactor consists of a primary reduction zone, a c... | 08/05/1980 |
| 3948641 | Apparatus for the continuous production of steel from ore Iron ore is continuously converted to steel by introducing the ore into a shaft furnace of substantially equal cross-sectional width and thus forming a column of the charge therein; introducing a reducing gas into the furnace and exposing the bottom porti... | 04/06/1976 |
