TY - GEN
T1 - Reduction behavior of chromite carbon composite pellets, at temperature of 1873K
AU - Zambrano, Adolfo Pillihuaman
AU - Takano, Cyro
AU - Nogueira, Alberto Eloy Anduze
AU - Ribeiro, Tiago Ramos
AU - Mourão, Marcelo Breda
PY - 2008
Y1 - 2008
N2 - 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.
AB - 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.
KW - Chromite
KW - Ferrochromium
KW - Self-reducing agglomerate
UR - http://www.scopus.com/inward/record.url?scp=62549098602&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:62549098602
SN - 9788577370320
T3 - ANNALS - 3rd International Meeting on Ironmaking and 2nd International Symposium on Iron Ore
SP - 667
EP - 677
BT - 3rd International Meeting on Ironmaking and 2nd International Symposium on Iron Ore
T2 - 3rd International Meeting on Ironmaking and 2nd International Symposium on Iron Ore
Y2 - 22 September 2008 through 26 September 2008
ER -
