Kinetics of the Non-isothermal Reduction of Cr_2O_3 with Aluminium

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概要

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• The present paper presents the results of a thermoanalytical investigation on the kinetics of the aluminothermic reduction of Cr2O3 under non-isothermal conditions. Simultaneous differential thermal analysis (DTA) and thermogravimetry (TG) technique were used. It was determined the minimum molar ratio Cr2O3 : Al for the completion of the reaction and the value of the change of enthalpy associated to the reduction. X-ray diffraction was used in order to identify the products of reduction. Since the oxidation of aluminium and the reduction of Cr2O3 occur simultaneously, it was possible to study the kinetics by analysing the rate of generation of the peak area for the Cr2O3 reduction (DTA) and the mass gain due to the oxidation of some of the excess of aluminium (TG). The reduction was controlled by first order chemical reaction and the reduction was isokinetic within the experimental conditions of the present work.

• 社団法人 日本鉄鋼協会の論文
• 2004-05-15

著者

• Capocchi Jose

  Department Of Metallurgical And Materials Engineering Polytechnic School The University Of Sao Paulo

• Lazzari Claudio

  Department Of Metallurgical And Materials Engineering Polytechnic School The University Of Sao Paulo

• CINTHO Osvaldo

  Department of Materials Engineering, The University of Ponta Grossa

• Cintho Osvaldo

  Department Of Materials Engineering The University Of Ponta Grossa

• CAPOCCHI Jose

  Department of Metallurgical and Materials Engineering of the Polytechnic School of the University of Sao Paulo

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• Recycling of Solid Wastes from Integrated Steelmaking Plant : A Sustainable Alternative
• Kinetics of the Non-Isothermal Reduction of Nb2O5 with Aluminium

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