| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 075503000 | Reduction in presence of solid Carbon(C) containing material (e.g., coke, coal, carbides, etc.) | 6 |
| 20110030507 | PROCESS AND APPARATUS FOR PRODUCING LIQUID PIG IRON OR LIQUID PRIMARY STEEL PRODUCTS - A process and an apparatus for producing liquid pig iron or liquid primary steel products from charge materials formed by iron ores and additions. The charge materials are subjected to a further reduction in a reducing zone ( | 02-10-2011 |
| 20110100162 | METHOD AND SYSTEM FOR PRODUCING METALLIC IRON NUGGETS - A method and system for producing metallic iron nuggets may include providing multiple layers of agglomerates, such as briquettes, balls and extrusions, of a reducible mixture of reducing material (such as carbonaceous material) and of a reducible iron bearing material (such as iron oxide) on a hearth material layer (such as carbonaceous material) and providing a coarse overlayer of carbonaceous material over at least some of the agglomerates. Heating the agglomerates of reducible mixture to 1425° C. or 1400° C. or 1375° C. results in formation of an intermediate product of one or more metallic iron nuggets, which may have a sulfur content of less than 0.03%, and slag, which may have less than 5% mass MgO, which may have a ratio of percent by weight sulfur in the slag over percent by weight sulfur in the metallic nuggets of at least about 12 or at least about 15. | 05-05-2011 |
| 20120055287 | METHOD FOR SIMULTANEOUSLY PRODUCING IRON, COKE, AND POWER - An alternative ironmaking process for simultaneously producing a highly metalized iron/steel product, coke from coal, an iron/steel product from an iron rich feedstock, and, optionally, energy using heat recovery. The simultaneous process is performed in the environment of a non-recovery or heat recovery coke oven. The iron rich feedstock is layered on top of a coal bed. The iron rich feedstock and coal bed are heated in the presence of a reducing gas to reduce the iron oxides of the iron rich feedstock into the iron/steel product and to devolatilize the coal into coke. After quenching the iron/steel product and coke, the iron/steel product is separated from the coke. | 03-08-2012 |
| 20140331821 | PRODUCING OF PIG IRON FROM IRON-CONTAINING MATERIALS - A process for recovering pig iron from iron-containing concentrates produced from iron-containing ores and sands by forming agglomerates and reducing them in a natural gas smelter, in which the process makes maximum utilization of heat created in and by the process. | 11-13-2014 |
| 20150329929 | An Efficient Process in the Production of Iron and Steel from Iron Ore - The invention discloses a method of reducing iron oxide to recover iron from iron content mixture. The method includes the step of mixing a reductant containing at least one of a silicon carbide or ferro-silicon with iron content mixture and heating it at a temperature ranging from 600-1000° C. for reaction to undergo. The iron content mixture is one of an iron ore, iron oxide and gangue material. The addition of reductant during the manufacture of sponge iron, DRI or pig iron or during reduction of iron ore assures advantages such as better converts yield, efficient use of resources, thus resulting in increasing productivity and reducing the cost of manufacturing. The method converts and upgrades low grade iron ore to high grade iron ore by dry beneficiation magnetic separation. The method also helps in recovery of iron from slag generated during iron and steel production. | 11-19-2015 |
| 075504000 | Including consolidation of solid Carbon(C) containing material with reducible Iron(Fe) compound | 1 |
| 20130291685 | USE OF BIMODAL CARBON DISTRIBUTION IN COMPACTS FOR PRODUCING METALLIC IRON NODULES - A method for use in production of metallic iron nodules comprising providing a reducible mixture into a hearth furnace for the production of metallic iron nodules, where the reducible mixture comprises a quantity of reducible iron bearing material, a quantity of first carbonaceous reducing material of a size less than about 28 mesh of an amount between about 65 percent and about 95 percent of a stoichiometric amount necessary for complete iron reduction of the reducible iron bearing material, and a quantity of second carbonaceous reducing material with an average particle size greater than average particle size of the first carbonaceous reducing material and a size between about 3 mesh and about 48 mesh of an amount between about 20 percent and about 60 percent of a stoichiometric amount of necessary for complete iron reduction of the reducible iron bearing material. | 11-07-2013 |
