Isothermal Reduction Kinetics of Fe_2O_3 Mixed with 1-10% Cr_2O_3 at 1173-1473K

スポンサーリンク

概要

• 論文の詳細を見る

• Fired pure and 1–10% Cr2O3 -doped Fe2O3 compacts, were isothermally reduced with H 2 at 1173–1473 K. Compacts are prepared by mixing chemically pure powders of Fe2O3 and Cr2O3 in the required ratios then pressed at 30 kN into cylindrical form of compacts before being fired at 1473 K for 20 hr. The characteristics of the prepared compacts have been studied using X-ray diffraction analysis technique and reflected light microscope. The isothermal reduction curves obtained showed that Cr2O3 has a significant effect on the rate of reduction of Fe2O3 . From the apparent activation energy and the gas–solid mathematical formulations, the rate controlling step in the reduction process was determined and proved to be the interfacial chemical reaction at the initial stages, while at the final stages, a combined mechanism of solid-state diffusion and interfacial chemical reaction was the rate controlling step.

• The Iron and Steel Institute of Japanの論文
• 2000-04-15

著者

• Khedr Mohamed

  Faculty Of Science Beni-suef Branch Cairo Univ.

• KHEDR Mohamed

  Chemistry Department, Faculty of Science, (Beni-Suej branch) Cairo University

関連論文

• Reduction Behaviour of Iron Ore Fluxed Pellets under Load at 1023-1273K
• Effect of Nickel Oxide Doping on the Kinetics and Mechanism of Iron Oxide Reduction
• Isothermal Reduction Kinetics of Fe_2O_3 Mixed with 1-10% Cr_2O_3 at 1173-1473K

スポンサーリンク