Preparation and Reduction Behavior of Semi-Charcoal Composite Iron Ozide Pellets
Japanese cypress was carbonized partly at maximum carbonization temperatures TC, max=823, 1073 and 1273 K in order to obtain the semi-charcoal with some residual volatile matter (V.M.). The semi-charcoal obtained at TC, max= 823 K retained much V.M., mainly H2. Then, semi-charcoal composite pellets including residual V.M. have been prepared and reduced at reduction temperatures TR=1073 K and 1173 K in the N2 gas atmosphere. Fractional reduction F(%) after 60 min using the carbon composite pellet at TC,max= 823 K was 19 % and 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. Furthermore, the semi-charcoal composite pellets using the semi-charcoals obtained at TC,max=823, 1073 and 1273 K were heated from room temperature to TR, max= 1273 K at a heating rate of 10 K min-1 in the N2 or N2-CO-CO2 atmosphere. It was found that the residual V.M. in the semi-charcoal was released from nearly TC,max and the reduction of iron oxide was enhanced by such V.M. in the N2 or N2-CO-CO2 gas atmosphere.
carbon composite pellet woody biomass iron ozide reduction charcoal
Konihsi Hirokazu Ichikawa Kazuhira Usui Tateo
Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University 2-1Yamadaoka, Suita, Osaka 565-0871, Japan
国际会议
The 5th International Congress on the Science and Technology of Ironmaking(第五届国际炼铁科技大会 ICSTI09)
上海
英文
290-294
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）