Computational Calorimetric Study of the Iron Ore Reduction Reactions in Mixtures with Coal
| Autor: | John Lucas, Louis Wibberley, Guisu Liu, Vladimir Strezov |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
business.industry
Chemistry General Chemical Engineering Metallurgy technology industry and agriculture Mineralogy General Chemistry Atmospheric temperature range engineering.material complex mixtures Endothermic process Redox Industrial and Manufacturing Engineering respiratory tract diseases Iron ore engineering Coal Char Thermal analysis business Argon atmosphere |
| Zdroj: | Industrial & Engineering Chemistry Research. 44:621-626 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/ie030835t |
| Popis: | Thermal analysis on two coals (semi-anthracite and high-volatile coking coal), iron ore, and their corresponding mixtures was performed using a computer-aided thermal analysis technique. Samples were heated to 1000 °C at a typical rate of 10 °C/min under an argon atmosphere. It was found that the iron ore undergoes several reactions prior to its reduction, which resulted in an endothermic heat effect. The iron ore reduction commenced at temperatures as low as 580 °C and progressively increased at higher temperatures. Coal devolatilization was found to play an important role in iron ore reduction for the coal−ore mixtures at temperatures below 920 °C, while the effect of char gasification resulting in CO as a reducing gas was dominant at higher temperatures. No apparent difference in the effect of coal devolatilization on reduction reactions was observed when low- and high-volatile matter coal was mixed with the iron ore. The main difference was detected only in the temperature range where char gasificatio... |
| Databáze: | OpenAIRE |
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