Class / Patent application number | Description | Number of patent applications / Date published |
075505000 | Reduction with externally applied gas (e.g., batch HyL process, etc.) | 8 |
20090013828 | Reduction Process and Plant - Reduction process and relative plant for the production of metallic iron by means of the direct reduction of iron ore, in which a reduction shaft is connected to a source of reducing gas obtained from the gasification of coal. The process advantageously comprises a step in which a portion or all of the synthesis gas entering the plant circuit is processed to separate the methane from the rest of the components of said synthesis gas. The advantageous management of the extracted methane enables the entire reduction process to be optimized, making the efficiency of the process independent of the methane content in the original synthesis gas and making it possible to control the carbon content of the product more accurately and more easily. | 01-15-2009 |
20090090217 | METHOD FOR PRODUCING LIQUID PIG IRON OR LIQUID STEEL INTERMEDIATE PRODUCTS FROM FINE-PARTICLED MATERIAL CONTAINING IRON OXIDE - A method for producing liquid pig iron or liquid steel intermediate products from fine-particled material containing iron oxide. Fine-particled material containing iron oxide is prereduced in at least one prereduction stage with the aid of a reduction gas and is subsequently reduced in a final reduction stage to sponge iron. The sponge iron is melted in a melt-down gasification zone, with carbon carriers and oxygen-containing gas supplied. A CO- and H | 04-09-2009 |
20090249922 | Process for the production of steel using a locally produced hydrogen as the reducing agent - A manufacturing plant and process for producing steel from iron ore, at the iron ore mine, using a locally produced hydrogen as the reducing agent, where the hydrogen is produced through the electrolysis of water, using electricity generated by a wind power generator, thereby producing the cheapest possible reducing agent, on the mine site and producing steel with only oxygen and water vapor as the effluents from the process. | 10-08-2009 |
20110138965 | PROCESS AND DEVICE FOR PRODUCING PIG IRON OR LIQUID STEEL PRECURSORS - A process for producing pig iron or liquid primary steel products in a smelting unit ( | 06-16-2011 |
20130019716 | PROCESS AND APPARATUS FOR REDUCING CHARGE MATERIALS CONTAINING IRON ORE OR FOR PRODUCING PIG IRON OR LIQUID PRIMARY STEEL PRODUCTS - A process and an apparatus for reducing charge materials containing iron ore or for producing pig iron or liquid primary steel products in a smelting unit are provided, the charge materials being at least partially reduced in at least one reduction unit by means of a reducing gas and optionally at least some of the at least partially reduced charge materials being melted in a smelting unit while supplying coal or coke and gas containing oxygen, while simultaneously forming the reducing gas, and the reducing gas or a reducing gas generated externally being supplied to the reduction unit. In the event of an interruption in the production of pig iron or primary steel products, the at least one reduction unit is emptied and the at least partially reduced charge materials are introduced into at least one vessel and kept under a non-oxidizing shielding gas atmosphere. | 01-24-2013 |
20140260803 | PROCESS FOR PRODUCING DIRECT REDUCED IRON (DRI) UTILIZING GASES DERIVED FROM COAL - A process for producing direct reduced iron (DRI) from iron ores, utilizing a gas produced from fossil fuels, particularly coal, containing sulfur compounds and BTX, wherein said gas is heated in a gas heater, preferably of the regenerative type, wherein heat is transferred from a previously-heated solid material to the gas produced from coal. The hot gas is caused to flow through a bed of DRI particles, iron oxides or other equivalent material, outside of the reduction reactor, where said material adsorbs sulfur compounds and the BTX are destroyed. The gas resulting from this treatment, free from sulfur compounds and BTX, is combined with a reducing gas stream withdrawn from the reduction reactor after H | 09-18-2014 |
20150007697 | METHOD AND DEVICE FOR REDUCING IRON-OXIDE-CONTAINING FEEDSTOCKS IN A HIGH-PRESSURE REDUCING UNIT - A method for reducing iron-oxide-containing feedstocks by introducing a reducing gas into a high-pressure reducing unit ( | 01-08-2015 |
20160160304 | USE OF TOP GAS IN DIRECT REDUCTION PROCESSES - In one aspect, the invention relates to a system for producing direct reduced iron wherein a portion of the top gas from a first module for reducing iron oxide by a direct reduction process is utilized as fuel in the thermal equipment of a second module for reducing iron oxide by a direct reduction process, wherein the second module comprises a process gas heating unit. In various aspects, the thermal equipment of the second module is a reducing gas heater and/or a steam boiler. In a further aspect, the top gas from multiple instances of the first module can be utilized collectively as fuel in the thermal equipment of the second module. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention. | 06-09-2016 |