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| Number | Title | Issue Date |
| 7175690 | Pre-treatment process for feed material for direct reduction process A pretreatment process for solid lump feed material for a gas and pellet/lump-based direct reduction process, comprising preheating feed material to a temperature of from about 200 C to about 500 C, without reduction, in a non-reducing atmosphere prior to charging t... | 02/13/2007 |
| 6241804 | Process for producing iron briquettes and/or cold iron sponge A process and apparatus for producing iron briquettes and/or cold iron sponge, in which charge materials (3) which contain lumpy material containing iron oxide are introduced into the reduction zone (2) of a reduction reactor (1), then a hot reduction gas... | 06/05/2001 |
| 6224649 | Method and apparatus for reducing iron-oxides-particles having a broad range of sizes Methods and apparatus for the reduction into metallic iron of iron-oxides-containing particles having a broad range of sizes. Particles, typically within a broad range of sizes of about 0.1 mm to about 50 mm, are reduced by contact with a hot reducing gas... | 05/01/2001 |
| 6200363 | Direct reduced iron hot/cold discharge system A method and apparatus for discharging cold product or a combination of cold and hot products from a continuous supply of hot direct reduced iron ("DRI") comprising a product cooler connected to a shaft furnace, with downward movement of the hot DRI and u... | 03/13/2001 |
| 6132489 | Method and apparatus for reducing iron-oxides-particles having a broad range of sizes The present invention describes a method and apparatus for the reduction into metallic iron of iron-oxides-containing particles having a broad range of sizes. Particles, preferably within a broad range of sizes smaller than about 3.2 mm, are reduced by co... | 10/17/2000 |
| 5782957 | Process for treating iron bearing material A process for treating iron-bearing material with a carbonaceous material to form a dry mixture, wherein the amount of carbonaceous material added exceeds the stoichiometric amount required to reduce the metal oxide to elemental metal. In one embodiment, ... | 07/21/1998 |
| 5296015 | Method for the pneumatic transport of large iron-bearing particles In a method of producing iron and steel, from iron ores largely composed of iron oxides, wherein a direct reduction process is used to produce a solid particulate intermediate product, generally known as sponge iron or Direct Reduced Iron (DRI); pneumatic... | 03/22/1994 |
| 4702766 | Method of increasing carbon content of direct reduced iron and apparatus A method of producing a hot, carburized metallized iron product in a generally vertical shaft furnace having an upper reducing zone in which iron oxide reacts with a gaseous reductant, and a lower carbon control and product discharge zone, including: esta... | 10/27/1987 |
| 4612041 | Process for recovering valuable metals from an iron dust containing a higher content of zinc A process for recovering valuable metals from an iron dust with a high concentration of zinc comprising (1) pelletizing said dust into a pellet in a pelletizer, (2) preheating the resulting pellets by charging a hot gas to remove water, the loss on igniti... | 09/16/1986 |
| 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 |
| 4123707 | Magnetic field sensor housed in a cooling device for sensing the charge in a shaft furnace or the like A magnetic field sensor housed in a cooling device has an inner core body for measuring the behavior of a charge put in a shaft furnace, an inner casing for accommodating the inner core body therein, and an outer casing for accommodating the inner casing ... | 10/31/1978 |
| 4122392 | System of detecting a change in the charge put in a metallurgical furnace or the like A system of detecting a change in the charge put in a metallurgical furnace or the like wherein an magnetic field generator and a magnetic sensing section of a magnetometer arranged along the central axis of the exciting magnetic field of the said magneti... | 10/24/1978 |
