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Reduction Behavior of Semi-charcoal Composite Iron Oxide Pellets

机译：半木炭复合氧化铁颗粒的减少行为

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Japanese cypress was carbonized halfway at maximum carbonization temperatures TC,max = 823,1073 and 1273 K to obtain semi-charcoal with some residual volatile matter (V.M.); the gasification rate of the semi-charcoal obtained was higher than that of coke and coal char.The semi-charcoal at TC,max= 823 K retained much V.M.,especially almost all H2.The semi-charcoal composite iron oxide pellets including residual V.M.have been made and reduced at reduction temperatures TR = 1073,1173 and 1273 K in N2 gas atmosphere.Fractional reduction F (％) after 60 min of the semi-charcoal composite pellets with the particle size range of 63-75 μm at TC,max = 823 K were 19 ％ and 40 ％ at TR = 1073 and 1173 K,respectively,and were higher than any other pellets at TC,max=1073 and 1273 K.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.On the other hand,fractional reduction F of semi-charcoal composite pellet at TC,max = 1073 K using semi-charcoal particle with the size range of 23-35 μm was 38 ％ for 60 min at TR = 1173 and 95 ％ for 40 min at TR =1273 K,respectively,and was higher than any other pellets using semi-charcoal particles with the size ranges of 63-75 and 105 - 150 μm.As the size of semi-charcoal particle decreased,the reduction of iron oxide was much enhanced at TR = 1173 and 1273 K.The semi-charcoal composite pellets using the semi-charcoal 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 in the N2 gas or CO-CO2-N2 gas mixture atmosphere.It was found that the residual V.M.in the semi-charcoal was released nearly from TC,max and the reduction of iron oxide was enhanced by such V.M.in either case of N2 or CO-CO2-N2 atmosphere.
机译：在最大碳化温度Tc，MAX = 823,1073和1273k中，日本赛普拉斯在最大碳化温度下碳化，获得半炭，具有一些残留的挥发物质（V.M.）;获得的半木炭的气化率高于焦炭和煤炭炭的气化率。TC的半炭，MAX = 823k保留了多大VM，特别是几乎所有H2。半炭复合氧化铁颗粒，包括残留VM，包括残留VM在R TR = 1073,1173和1273K在N2气体气氛中进行并降低。在半炭复合粒料60分钟的半炭复合粒料中，在TC的粒度范围内的60分钟后，减少F（％），最大= 823K下分别为19％和在TR = 1073和173 K 40％，分别和比在TC任何其他粒料更高，上限= 1073和1273 K.When TC，max为低，即颗粒有更多的残余VM，在Tr = 1073和1173k的情况下，在Tr = 1073和1173k的情况下更快地加速氧化铁，另一方面，在TC的半炭复合颗粒的分数缩小F使用半炭粒子，尺寸范围为23在Tr = 1173和Tr = 1273k的Tr = 1173和95％时为38％，在TR = 1273k下为95％，高于任何OTH ER颗粒使用半炭颗粒的尺寸范围为63-75和105-150μm.as的半炭颗粒的尺寸降低，在TR = 1173和1273 K时，氧化铁的还原得多。半使用在TC，MAX = 823,1073和1273k处获得的半炭的木炭复合粒料在N 2气体或CO-CO 2中以10k / min的加热速率从室温加热至TR，MAX = 1273k N2气体混合物气氛。发现半炭的残留Vmin几乎从Tc释放，最大值和氧化铁的还原通过N 2或CO 2-N2气氛的任何一种情况而增强。

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