海绵钛副产品氯化镁高温气相氧化反应器内流场的模拟研究

针对"原位热解-热法还原炼镁"海绵钛清洁生产新工艺中镁、氯循环的关键步骤——气态MgCl_2与O_2的气相热解反应的反应器进行研究。设计了2种反应器模型,并采用物理模拟和数值模拟的方法研究反应器模型内的浓度场和速度场。物理模拟中,在N_2与CO_2流量比为6∶1时,CO_2采用环向四口进气方式,此时气体混合不均匀度为0. 02,混合程度最佳;数值模拟结果和物理模拟结果相吻合。

Simulation study on flow field of sponge titanium byproduct magnesium chloride in high temperature gas phase oxidation reactor

_{: This study is based on a new cleaner production process of titanium sponge by in-situ pyrolysis-pyrolysis reduction magnesium smelting, in which high purity magnesium oxide and chlorine were prepared by direct oxidation pyrolysis of gaseous magnesium chloride produced by reduction distillation. Meanwhile, magnesium oxide is returned to TiCl4 reduction after thermal reduction and chlorine is returned to boiling chlorination to realize new cycle of magnesium and chlorine in sponge titanium production. This study is aimed at the reactor for homogeneous pyrolysis of gaseous magnesium chloride with oxygen, the committed step of the circulation of magnesium and chlorine generated in titanium sponge production. The concentration and velocity fields in the reactor model were studied by numerical simulation and physical simulation. When the flow ratio of nitrogen to carbon dioxide is 6:1, the circular four-port intake mode is adopted for carbon dioxide, the gas mixing heterogeneity is 0.02, reaching the gas mixing degree.}