2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 1: D'Abreu Intl. Symp. / Iron and Steel Making
| Editors: | Kongoli F, Noldin JH, Takano C, Lins F, Gomez Marroquin MC, Contrucci M |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 320 pages |
| ISBN: | 978-1-987820-37-9 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Comparative Study Of Reduction Zinc Ferrite And EAF Dust By CO-CO2 Gas Mixture
Mery-Cecilia Gomez-Marroquin1; Jose Carlos D’Abreu2;1UNIVERSIDAD NACIONAL DE INGENIERIA-UNI, Lima, Peru; 2PUC-RIO, Rio de Janeiro, Brazil;
Type of Paper: Regular
Id Paper: 363
Topic: 2
Abstract:
In this work the reaction between an equimolar synthetic zinc ferrite-ZF and Electric Arc Furnace Dusts-EAFD samples and a mixture of CO - CO2 gases were studied to evaluate the effects of temperature and CO content. The temperature ranged from 1073 to 1373K, and the gas mixtures from 50% to 100% of CO. These tests were supported by physical, chemical, structural and microscopic characterizations of both, initial zinc ferrite generated in the laboratory and the remained after reaction. It was observed that the temperature and CO content were the main factors affecting the zinc ferrite reduction. The maximum reductions of ZF indexes obtained in these experiments were 85%, for 100% CO at 1373K, in 105 min, and 52%, for 50% CO at 1373K, elapsed 105 min and 100%, for 100% CO at 1273K, in 80.75 min, and 60%, for 50% CO at 1373K during 105 minutes. The Apparent Activation Energies obtained of ZF and EAFD reduction is between 55.60 to 54.74 kJ/mol and 91 to 100 kJ/mol, for 100%CO and 50% CO-50% CO2, respectively. Values of Apparent Activation Energy-Ea estimated a predominant chemical reaction as control mechanism during the gaseous reduction of ZF and EAFD samples.