钛渣流态化氯化流动特性的数值模拟

基于双流体模型,结合钛渣的物性参数,采用Fluent软件对钛渣流态化氯化过程的数学模型进行了模拟,通过不同的临界流化速度,对钛渣流态化氯化的流动特征进行了研究。结果表明:Grace修正公式适合钛渣流态化氯化最小流化速度的计算;在最小流化速度下,床层首先形成乳相,随着流化时间的延长,在中部形成小气泡;在完全流化速度下,床层首先经历节涌过程,然后进入完全流化。

Numerical simulation for flow characterisitcs in titanium slag fluidization

The flow characteristics of chlorination of titanium slag in a fluidized bed are studied based on two-fluid model combined with physical properties of titanium slag with Fluent under different critical fluidizing velocities. Numerical results indicate that the modifier formula by Grace is more suitable for calculating the minimum fluidization velocity of chlorination of titanium slag. Furthermore, it also shows that, under minimum fluidization velocity, emulsion phase emerges first in the bed, and then some small bubbles take place, while under complete fluidization velocity, slugging processes at the beginning, and then it turns to be complete fluidization.