2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 3: Takano Intl. Symp. / Metals & Alloys Processing
| Editors: | Kongoli F, Noldin JH, Mourao MB, Tschiptschin AP, D'Abreu JC |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 550 pages |
| ISBN: | 978-1-987820-26-3 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Carbonization Behavior in the Production of Fe-Coke
Bruno Flores1; Ismael Flores1; Adria Guerrero2; Angeles G. Borrego2; Maria Antonia Diez2; Eduardo Osorio1; Antonio Cezar Vilela1;1FEDERAL UNIVERSITY OF RIO GRANDE DO SUL, Porto Alegre, Brazil; 2INSTITUTO NACIONAL DEL CARBON - INCAR, Oviedo, Spain;
Type of Paper: Regular
Id Paper: 111
Topic: 3
Abstract:
The application and viability of agglomerates composed of coal and iron ore, known worldwide as Fe-coke, have been recently proposed as an innovative alternative to the reduction of CO2 emissions and energy consumption in the blast furnace. The present study aimed to investigate the carbonization behavior of coal/iron ore briquettes produced with different coals and the quality of Fe-coke produced. Three coals with different ranks were selected and individually blended with iron ore (pellet feed) on the proportion coal/iron ore equal 2.33. Low amounts of charcoal and a molasses/CaO as binder were added to the mixtures. Briquettes were produced in a laboratorial roll-press machine and subjected to carbonization in a laboratorial furnace. It was also carried out pyrolysis experiments in a thermobalance with small briquettes pieces. Briquettes mechanical strength was characterized before and after carbonization through compression and tumbler tests. Wet analysis, X-ray diffraction and Mossbauer spectroscopy were carried out to determine the iron phases present throughout the carbonization process. The changes in briquettes morphology during carbonization were analyzed by optical and scanning microscopies. The thermogravimetric experiments allowed a detailed evaluation of mass loss due to coal pyrolisys and iron ore reduction reactions. Mechanical strength of Fe-coke briquettes showed a significant dependence on temperature and coal characteristics. In general, the strength of iron-coke briquettes was higher for samples produced with higher fluidity coals. Morphological characteristics revealed significant differences among the briquettes produced from different coals, where the coke matrix cohesion was better for samples produced with higher fluidity coals and contributed to explain the differences in mechanical strength of Fe-coke briquettes.
Keywords:
Charcoal; Coke; Energy;References:
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