Title
Reduction behavior of chromite carbon composite pellets, at temperature of 1873K
Date Issued
01 January 2008
Access level
metadata only access
Resource Type
conference paper
Author(s)
University of Sao Paulo
Abstract
Pre-reduced ferrochromium with high recovery yield of chromium is expected to decrease the overall energy consumption for ferrochromium production. The advantages of pre-reduced in comparison with lump ore in charging electric furnace for ferro-chromium production are: i) low consumption of electric energy; ii) use of fines of chromite and reductant; iii) better operational control of the electric furnace. The self-reducing pellets containing Brazilian chromite (Jacurici concentrate), petroleum coke and 2% Fe-75%Si, were agglomerated with Portland cement. For each experiment ∼200g of pellets was used and they were placed at reduction zone (1773K) in a laboratory rotary kiln furnace. Experiments with 5, 10 and 30 minutes were made. The reduced pellets were analyzed by scanning electronic microscopy and it was observed: practically complete reductions of Cr and Fe; formation of a continuous slag phase at 30 minutes; a pre-reduced with compression strength of 130 kgf and without re-oxidation. The results have shown a great potential for use of this self-reducing process for high carbon ferro-chromium production.
Start page
667
End page
677
Language
English
OCDE Knowledge area
Ingeniería de procesos
Ingeniería de materiales
Subjects
Scopus EID
2-s2.0-62549098602
Resource of which it is part
ANNALS - 3rd International Meeting on Ironmaking and 2nd International Symposium on Iron Ore
ISBN of the container
978-857737032-0
Conference
3rd International Meeting on Ironmaking and 2nd International Symposium on Iron Ore
Sources of information:
Directorio de Producción Científica
Scopus