Class / Patent application number | Description | Number of patent applications / Date published |
075443000 | Reducing in gaseous suspension | 9 |
20090211401 | METHOD FOR THE DIRECT REDUCTION OF IRON OXIDES TO METALLIC IRON UTILIZING COKE OVEN GAS OR THE LIKE - A process for reducing iron ore particles in a moving bed reduction reactor comprising an upper reduction zone and a lower discharge zone, wherein the coke oven gas, preferably forming all the make-up for the reducing gas circulating through and reacting in said reduction zone, is first fed to said discharge (cooling) zone and thereafter said coke oven gas, conditioned by the DRI in the lower zone, is withdrawn from the reactor and fed preferably into the recycled reducing gas for injection into the reduction zone of the reactor. Heavy hydrocarbons and other components of coke oven gas which may otherwise cause fouling, corrosion, or deposits in the direct reduction plant are removed from coke oven gas by catalytic and/or adsorptive action of the DRI present in said lower zone, before being externally transferred to the reduction zone of the reduction reactor. | 08-27-2009 |
20120036961 | Method and System for Producing Pig Iron or Fluid Steel Pre-Products - A method and a plant for the production of pig iron or liquid steel semi-finished products are shown, metal oxide-containing batch materials and, if appropriate, aggregates being at least partially reduced in a reduction zone by a reduction gas, subsequently being introduced into a smelting zone and being smelted along with the supply of carbon carriers and oxygen-containing gas and along with the formation of the reduction gas. The reduction gas formed in the smelting zone is supplied to the reduction zone, reacted there and drawn off as export gas, CO | 02-16-2012 |
075444000 | Fluidized bed | 7 |
20080196549 | Direct Reduction Process Using a Single Fluidised Bed - A direct reduction process for a metalliferous material includes supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidizing gas into a fluidized bed in a vessel and maintaining the fluidized bed in the vessel, at least partially reducing metalliferous material in the vessel, and discharging a product stream that includes the partially reduced metalliferous material from the vessel. The process comprises (a) reducing the metalliferous material in a solid state in a metal-rich zone in the vessel; (b) injecting the oxygen-containing gas into a carbon-rich zone in the vessel with a downward flow in a range of ±40° to the vertical and generating heat by reactions between oxygen and the metalliferous material (including metallized material), the solid carbonaceous material and other oxidizable solids and gases in the fluidized bed, and (c) transferring heat from the carbon-rich zone to the metal-rich zone by movement of solids within the vessel. The metal-rich zone is formed in a lower section of the vessel and the carbon-rich zone is an intermediate section below an upper section of the vessel. Oxygen-containing gas is injected into a central region of the vessel. | 08-21-2008 |
20080210055 | Direct Reduction Apparatus and Process - An apparatus for reducing a metalliferous material in a fluidized bed includes a vessel for containing the fluidized bed, a mechanism for supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidizing gas into the vessel for forming the fluidized bed in the vessel. The oxygen-containing gas supply mechanism includes one or more than one oxygen-containing gas injection lance having a lance tip with an outlet that is positioned for injecting the oxygen-containing gas in a downward flow into the vessel within a range of plus or minus 40° to the vertical. | 09-04-2008 |
20100269636 | DIRECT REDUCTION APPARATUS AND PROCESS - An apparatus for reducing a metalliferous material in a fluidized bed includes a vessel for containing the fluidized bed, a mechanism for supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidizing gas into the vessel for forming the fluidized bed in the vessel. The oxygen-containing gas supply mechanism includes one or more than one oxygen-containing gas injection lance having a lance tip with an outlet that is positioned for injecting the oxygen-containing gas in a downward flow into the vessel within a range of plus or minus 40° to the vertical. | 10-28-2010 |
20120125159 | SYSTEM AND METHOD FOR REDUCING IRON OXIDE TO METALLIC IRON USING COKE OVEN GAS AND OXYGEN STEELMAKING FURNACE GAS - A process for reducing iron oxide to metallic iron using coke oven gas (COG), including: a direct reduction shaft furnace for providing off gas; a COG source for injecting COG into a reducing gas stream including at least a portion of the off gas; and the direct reduction shaft furnace reducing iron oxide to metallic iron using the reducing gas stream and injected COG. The COG has a temperature of about 1,200 degrees C. or greater upon injection. The COG has a CH | 05-24-2012 |
20160186276 | METHOD AND APPARATUS FOR RECYCLING TOP GAS FOR SHAFT FURNACE - Method, apparatus and system for improved energy efficiency in a direct reduction iron production process which uses a direct reduction shaft furnace and syngas as the reduction gas. The method and system of the invention use a part of the top gas emanating from the shaft furnace as transport gas for the gasifier, and control the volume of the top gas used as recycled top gas or fuel for the gas heater. The present invention achieves high energy efficiency, and reduces the need to use additional CH | 06-30-2016 |
075445000 | With melting of Iron(Fe) | 1 |
075446000 | Outside the fluidized bed | 1 |
20150135899 | METHOD AND DEVICE FOR INTRODUCING FINE PARTICLE-SHAPED MATERIAL INTO THE FLUIDISED BED OF A FLUIDISED BED REDUCTION UNIT - A method for introducing fine particulate material ( | 05-21-2015 |
075447000 | With solid in fluidized bed in addition to reducible Iron(Fe) compound | 1 |
075448000 | Carbon(C) | 1 |
075449000 | Generated in situ | 1 |
20090308204 | METHOD AND APPARATUS FOR REDUCING METALLIFEROUS MATERIAL TO A REDUCTION PRODUCT - Disclosed is a method for reducing metalliferous material to a reduction product. Also disclosed is an apparatus for reducing metalliferous material to a reduction product. | 12-17-2009 |