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| Deoxidation Kinetics of 1mm ~3 mm Ore Fines with H2 |
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Abstract Experiment was conducted in a self-prepared kg-scale high temperature fluidized bed for kinetics of 1 mm~3mm ore fine reduction with hydrogen. The utilization degree of gas decreases with reaction, which shows that the reaction is rapid during the beginning of deoxidation process, while slower with time. The higher the reaction temperature, the more the utilization degree of gas, but the difference of utilization degree at various temperatures shortens with time. The utilization degree of gas is 9%, and the metallization degree reaches 84% for 20min deoxidation process at 750℃，which shows the deoxidation reaction with hydrogen is very rapid. The almost linear increases of metallization degree with gas velocity, which shows the deoxidation reaction with hydrogen is very rapid further. So, much higher velocity of reducing gas can be allowed to improve the productivity of facility when hydrogen as reducing gas compares to CO gas. Metallization degree decrease s while utilization degree of gas increases gradually with the height of charge increasing. The reaction temperature can drop to 700~750℃ with hydrogen as reducing gas, which can avoid the sticking problems of fluidized bed.
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Received: 07 October 2008
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| [1] |
DU Liang, HAN Xiu-li, ZHANG Quan-sheng, ZHOU Xiang, YANG Hong-da, WANG Ying. Quantitative relation between mineralogical structure and metallurgical properties of sinter of import iron ore[J]. Iron and Steel, 2020, 55(6): 38-45. |
| [2] |
WANG Feng1,XIANG Jia-fa2,GUO Yu-feng1,ZHENG Fu-qiang1. Research progress of sintering optimization ore blending method based on basic process performance of iron ore[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(2): 89-95. |
| [3] |
YU Lu,XU Run-sheng,WANG Wei,DANG Han,ZHENG Heng,LIU Quan-guo. Effect of iron ore powder on volumetric evolution of iron coke during carbonization[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(6): 515-521. |
| [4] |
FAN Jianjun, GUO Yufeng, ZANG Long, SHI Yonglin, LI Haokun, ZHENG Fuqiang. Effect of basicity on properties of pellets produced by ultra finesized iron concentrate[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(5): 440-445. |
| [5] |
MA Xu-dong,WU Sheng-li,ZHAI Xiao-bo,SU Li-xin,LV Xu-dong. Effect of a high alumina Australia ore on fluidity and brittle minerals of sintering bonding phase[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(11): 963-970. |
| [6] |
FU Zhong- wang,ZHU Li,,ZHAO Yong,,CHEN Xiao- min,YUCHI He- peng,WU Keng. Guiding sintering ore ordination based on high temperature performance characteristic numbers of iron ore fines[J]. , 2019, 31(1): 1-7. |
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2010, Vol. 45 
