Direct reduction of iron oxide by solid carbon.
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Accession number;05A0248790
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| Title;Direct reduction of iron oxide by solid carbon. |
| Author;
IGUCHI YOSHIAKI
(Nagoya Inst. of Technol.)
YOKOMOTO SHOHEI
(Nagoya Inst. of Technol.)
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Journal Title;Current Advances in Materials and Processes
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Journal Code:X0994A
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ISSN:0914-6628
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VOL.18;NO.1;PAGE.10-13(2005)
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| Figure&Table&Reference;FIG.10, REF.6 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The reaction rate in carbon composite iron ore pellets (CCIP) during heating in flowing nitrogen gas and the carburization of reduced iron at the end of the reaction are reported following the previous report. The carbon concentration is measured by the combustion method in place of the EPMS method employed in the previous report. Brazilian red iron ore, and Samarco pellet feed are employed as the iron ore, and the reductant employed is coal char, metallurgical coke, and chemical reagent class graphite. Clean reduced iron is pulverized and rinsed in alcohol under supersonic irradiation to remove adhered carbon, and the carbon content in the reduced iron is determined by the combustion method. The relation between the amount of carbon and reaction progress is defined, and the effects of kinds of carbonaceous materials, grain size, temperature, pressure of the environments, on the reaction rates in CCIP are investigated. Effects of the species of carbonaceous materials on the carburization of reduced iron are also investigated. The results obtained are that the indirect reaction is dominant under 1 atm with coal char, that coke and graphite react with iron ore directly, and that the carburization of reduced iron is the direct reaction with a kind of diffusion to be the rate determining step. |
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