含碳球团在氧化性气氛中的还原机理

Reduction Mechanism of Pellet Containing Carbon in Oxidizing Atmosphere

根据Ｓｔｅｆａｎ流理论，研究了含碳球团在氧化性气氛中的还原机理，建立了极限抗氧化还原速度ｖＲＬ的计算式。结果表明：当还原速度大于ｖＲＬ时，还原过程不受氧化性气氛的影响。加热温度一定时，ｖＲＬ随气相中ＣＯ浓度增加和气流速度减小而降低，加热温度对ｖＲＬ的影响不大。

Based on the theory of Stefan flow, reduction mechanism of pellet containing carbon in oxidizing atmosphere has been studied and the minimum reduction rate vRL of pellet without oxidation may be calculated. When reduction rate is larger than vRL, pellets are reduced in oxidizing gas without oxidation. vRL decreases with the flow rate of oxidizing gas decreasing and CO content in gas increasing. The effect of heating temperature on vRL is not sensible.