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Japanese cypress were carbonized partly at maximum carbonization temperatures (TC, max = 823, 1073 and 1273 K) in order to obtain semi-charcoal with residual volatile matter (V.M.). Charcoal composite pellets using such semi-charcoal including residual V.M. have been prepared and reduced at reduction temperature (TR) in N2 gas atmosphere. Fractional reduction F(%) after 60 min of the semi- charcoal composite pellet at TC, max = 823 K was 20 % and over 40 % at TR = 1073 and 1173 K, respectively, and was higher than any other pellets. When TC, max was lower, namely the pellet had more residual V.M., the reduction of iron oxide was more accelerated at TR = 1073 and 1173 K. Fractional reductions F(%) of all the semi- charcoal composite pellets were over 90 % for 60 min at TR = 1273 K. On the other hand, fractional reduction F(%) of the semi-charcoal composite pellet at TC, max = 1073 K using semi-charcoal particle with the size of 23
Japanese cypress were carbonized partly at maximum carbonization temperatures (TC, max = 823, 1073 and 1273 K) in order to obtain semi-charcoal with residual volatile matter (V.M.). Charcoal composite pellets using such semi-charcoal including residual V.M. have been prepared and reduced at reduction temperature (TR) in N2 gas atmosphere. Fractional reduction F(%) after 60 min of the semi- charcoal composite pellet at TC, max = 823 K was 20 % and over 40 % at TR = 1073 and 1173 K, respectively, and was higher than any other pellets. When TC, max was lower, namely the pellet had more residual V.M., the reduction of iron oxide was more accelerated at TR = 1073 and 1173 K. Fractional reductions F(%) of all the semi- charcoal composite pellets were over 90 % for 60 min at TR = 1273 K. On the other hand, fractional reduction F(%) of the semi-charcoal composite pellet at TC, max = 1073 K using semi-charcoal particle with the size of 23
Palavras-chave
Ironmaking; Volatile matter; Charcoal; Carbon composite pellet.
Ironmaking; Volatile matter; Charcoal; Carbon composite pellet.
Como citar
Konishi, Hirokazu;
Ichikawa, Kazuhira;
Usui, Tateo.
REDUCTION BEHAVIOR OF CHARCOAL COMPOSITE IRON OXIDE PELLETS INCLUDING RESIDUAL VOLATILE MATTER
,
p. 91-99.
In: 7th Japan-Brazil Syposium on Dust Processing-Energy-Environment and 1st International Seminar On Self-Reducing and Cold Bonded Agglomeration,
São Paulo,
2008.
ISSN: -
, DOI 10.5151/5463-5463-2009-15676-0012
