Kinetics of Reduction of FeO from Slag by Graphite and Coal Chars

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概要

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• The rates of reduction of FeO from iron-saturated FeO-CaO-Al2O3-SiO2 slags by graphite, coke, bituminous coal and anthracitic coal chars at temperatures in the range 1673-1873 K have been measured using a sessile drop technique. The extents of reaction were determined using EPMA analysis of quenched samples, and on line gas analysis using a quadrupole mass spectrometer. The reaction rates have been shown to be dependent critically on carbon type. For the reaction geometry used in this investigation the reduction rates of graphite and coke are observed to be faster than with coal chars. This unexpected finding is shown to be associated with differences in the dominant chemical and mass transfer mechanisms occurring at the reaction interface. High reaction rates are observed to occur with the formation of liquid Fe-C alloy product and the associated gasification of carbon from the alloy. The rates of reduction by coal chars are determined principally by the chemical reaction at the carbon/gas interface and slag phase mass transfer.

• 社団法人 日本鉄鋼協会の論文
• 2005-05-15

著者

• Hayes P.

  Pyrometallurgy Research Centre School Of Engineering University Of Queensland

• Teasdale S.

  Pyrometallurgy Research Centre School Of Engineering University Of Queensland

関連論文

• Observations of the Reduction of FeO from Slag by Graphite, Coke and Coal Char
• Kinetics of Reduction of FeO from Slag by Graphite and Coal Chars

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