Table of Contents
Journal of Metallurgy
Volume 2014 (2014), Article ID 201659, 8 pages
http://dx.doi.org/10.1155/2014/201659
Research Article

Mathematical Analysis of the Reduction of Wüstite at Different Basicity Using Factorial Design

1Pyrometallurgy Department, Central Metallurgical Research and Development Institute (CMRDI), El-Felezzat Street 1, P.O. Box 87, El-Tebbin, Helwan, Cairo 11422, Egypt
2Institute of Ferrous Metallurgy (IEHK), RWTH Aachen University, 52056 Aachen, Germany

Received 15 September 2014; Revised 20 November 2014; Accepted 3 December 2014; Published 16 December 2014

Academic Editor: Stefano Gialanella

Copyright © 2014 E. A. Mousa. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Numerical prediction is performed on the reduction of wüstite under simulated blast furnace conditions using factorial design approach. Wüstite sinter samples with different basicity (0.5, 1.0, and 2.0) are reduced with a gas mixture consisting of 30% CO, 10% H2, 5% CO2, and 55% N2 at 950–1100°C. In all cases, the reduction degree of wüstite increased with basicity and temperature. A 23 factorial design is applied to derive a regression model based on the experimental data of acidic (CaO/SiO2 = 0.5) and basic (CaO/SiO2 = 2.0) wüstite which is reduced at 950°C and 1100°C for 5 and 35 min. The developed mathematical model is applied to predict the reduction degree of wüstite at different basicity (0.5, 1.0, and 2.0), interval of time (5–35 min), and temperatures (950, 1000, 1050°C, and 1100°C). In general, the results of the driven models are found to be in good agreement with the experimental data of reduction of wüstite in many cases. The MATLAB program is used to carry out the required calculations.