Kinetics of Aluminothermic Reduction of MnO_2 and Fe_2O_3 : A Thermoanalytical Investigation

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概要

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• This paper presents the main kinetic parameters for aluminothermic reduction of MnO<SUB>2</SUB> and Fe<SUB>2</SUB>O<SUB>3</SUB>. Aluminothermic reduction which in fact is a redox reaction requires an initial input of heat which is obtained through external reaction and/or oxidation of aluminium. In a system where oxidation as well as reduction take place simultaneously it is difficult to predict the kinetics of either reduction or oxidation. The present work aims at to describe the kinetics of reduction of MnO<SUB>2</SUB> and Fe<SUB>2</SUB>O<SUB>3</SUB> during aluminothermic reductions using simultaneous DTA/TG technique. If one understand the aluminium oxidation reaction then kinetics for the reduction of MnO<SUB>2</SUB> and Fe<SUB>2</SUB>O<SUB>3</SUB> can be obtained from DTA data for the overall reaction. <Br>Using suitable calibration constant a theoretical DTA curve is generated from the TG data to describe oxidation of aluminium. The oxidation data were deducted from the overall DTA data on redox reaction to obtain data on reduction only. The rate of generation of peak area for MnO<SUB>2</SUB> and Fe<SUB>2</SUB>O<SUB>3</SUB> thus obtained was a measure of reduction reaction rate.

• 社団法人 日本鉄鋼協会の論文
• 1996-09-15

著者

• Ray H.

  Regional Research Laboratory

• SARANGI B.

  Department of Metallurgical & Materials Engineering, Indira Gandhi Institute of Technology

• SARANGI A.

  Department of Metallurgy, Regional Engineering College

• Sarangi A.

  Department Of Metallurgy Regional Engineering College

• Sarangi B.

  Department Of Metallurgical & Materials Engineering Indira Gandhi Institute Of Technology

関連論文

• Some Kinetic Aspects of Reduction of FeO in Molten Slags by Solute Carbon
• Kinetics of Aluminothermic Reduction of MnO_2 and Fe_2O_3 : A Thermoanalytical Investigation
• Fluidized Bed Reduction of Iron Ore Fines by Coal Fines.

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