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Modelling of Defluidization of ZrO2/Fe Particles in High Temperature Gas Fluidization: Influence of Fe Contents

机译:高温气体化ZrO 2 Fe颗粒的碎裂性模拟:Fe含量的影响

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The contents of Fe on the surface of iron ore fines had a great influence on the fluidization behavior during high temperature fluidized bed reduction, which would cause defluidization when exceeding a critical value. In this paper, simplistically, ZrO_(2)/Fe particles with different Fe contents on the surface were used as raw materials. Through modification of previous models, a quantitative relationship was established to predict the defluidization temperature of ZrO_(2)/Fe particles with different Fe contents, and the calculation results corresponded well with the experimental data obtained from the defluidization test. The model in this paper firstly explained the dependence of defluidization behavior on the contents of Fe in high temperature gas fluidization, and it could well predict the metallization degree of commercial iron ore fines when defluidization occurred during fluidized bed reduction. Therefore, the model could be used as a reference to select suitable operating conditions for treating fine iron oxide particles in high temperature gas fluidization processes, such as direction reduction and chemical looping.
机译:铁矿石表面上的Fe的含量对高温流化床减少期间的流化行为产生了很大影响,这将在超过临界值时引起渗透率。本文在简单地,表面上具有不同Fe含量的ZrO_(2)/ Fe颗粒用作原料。通过修改以前的模型,建立了定量关系,以预测ZrO_(2)/ Fe颗粒具有不同Fe含量的渗透温度,并且计算结果良好地对应于从流失试验中获得的实验数据。本文的模型首先解释了渗透行为对高温气体化的Fe含量的依赖性,并且在流化床减少期间发生碎裂时,可以很好地预测商业铁矿石的金属化度。因此,该模型可以用作选择适当的操作条件,以在高温气体流化过程中处理细铁氧化物颗粒,例如方向减少和化学循环。

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