Patent
Method of and apparatus for reducing iron oxide to metallic iron
Beggs D,Scarlett J +1 more
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TLDR
In this paper, a method and apparatus for reducing iron oxide to metallic iron, utilizing a continuous process employing a reducing gas with a high H2 and CO content made by catalytically reforming a mixture of gaseous hydrocarbon and reacted off-gas from the reduction process.Abstract:
This invention relates to a method and apparatus for reducing iron oxide to metallic iron, utilizing a continuous process employing a reducing gas with a high H2 and CO content made by catalytically reforming a mixture of gaseous hydrocarbon and reacted off-gas from the reduction process. The CO2 plus H2O present in the reacted off-gas are utilized as the hydrocarbon reforming oxidant, without the addition of reforming oxidant from an external source.read more
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Method and apparatus for the gaseous reduction of iron ore to sponge iron
Celada J,Mac Kay P,Villarreal D +2 more
TL;DR: In this article, a differential pressure controller is used to maintain substantially equal gas pressure at the bottom of the reduction zone and the gas pressure on the top of the cooling zone, respectively.
Patent
Process for removal of carbon dioxide for use in producing direct reduced iron
TL;DR: In this article, an improved CO 2 -rejection method using an external natural gas purge stream after depressurization and before the product purge step is described, which surprisingly reduces the adsorbent regeneration requirements to maintain the selective adsorption of carbon dioxide from the spent reducing gas.
Patent
Method for producing metallic iron particles
TL;DR: In this article, a method of producing iron particles in a generally vertical furnace in which a gravitational flow of particulate material is reduced in a reducing zone by a countercurrent flow of a reducing gas containing a reductant, the spent reducing gas is removed and cooled and a portion is introduced as cooling gas in a cooling zone near the bottom of the furnace, and the cooling gas is upgraded in reducing potential and introduced to the reducing zone as reducing gas.
Patent
Apparatus for cooling a moving bed of solid, gas permeable particles
TL;DR: In this article, an apparatus for efficiently cooling a moving bed of gas permeable particles descending downwardly through a converging bin is described. The apparatus includes a support mechanism and an especially configured gas distributor depending downwardly therefrom within the bin.
Patent
Process for reducing iron oxide to metallic sponge iron with liquid or solid fuels
TL;DR: In this paper, an economical process is provided for the direct reduction of iron ore by the efficient production of a reducing gas when the external source of fuel used in the process is a liquid or solid.
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Patent
Process for reduction of metaloxygen compounds
TL;DR: In this article, low-temperature reduction of metal-oxygen compounds such as oxides, carbonates etc. by means of hydrocarbons such as methane and its higher homologs, by ethylene, acetylene, benzene and their respective...