反胶团法制备ZrO_2超细粉末过程的放大模型

MODEL FOR SCALING-UP REVERSE MICELLE METHOD TO GET ULTRAFINE ZrO_2 POWDER

使用喷射 -搅拌混合器 ,使油水两相可以快速而且充分接触 ,从而利用反胶团法得到粒度分布均匀的ZrO2 超细粉末 .首先利用模型预测了不同转速和不同相比下两相传质的结果 ,然后用实验验证了模型的准确性 。

There are many methods for preparing ultrafine powder. For the reason of experimental condition and cost, it is difficult to scale-up. The reverse-micelle method overcomes these shortcomings, but because micromixing can not be obtained when oil is mixed with water, the result of scaling-up is unsatisfactory. The spraying the rotating mixer is used to mix two phases quickly and uniformly, and a better product can be obtained. A mathematical model is used to deduce the result of mass transfer between two phases at different impeller speed and different phase ratio, then experimental result is used to test the exactness of the model. The model can be used for the research of scaling-up of this method.