Study On The Key Technology Of Ultra-fine Grinding Based On High-pressure Microfluidics

In this article, the technology of super-fine grinding based on high pressure microfluidics is studied in three aspects, which are the mechanism of it, the influence of the mico-channel to grinding effect and the testing effect of the equipment. At first, we analyze the characteristics of the technology, its status and actuality and trend in our country and overseas, and discuss the feasibility of it application. Secondly, we explain the mechanism of it by studying it interrelated theory and researches, point it out that the distribution of the static pressure and the velocity decide the three main force in the liquid flow-flied of high pressure microfluidics, and explain the characteristics of the liquid flow-flied of high pressure microfluidics in theory by consulting the theory of impinging streams. Thirdly, using FLUENT software we model and compute the liquid flow-flied, and get the basic distribution of it, from it we know that the velocity and the velocity grads is very tremendous, the change of the static pressure is very great, that bring huge force in the liquid flow-flied of high pressure microfluidics, and ensure that the equipment get perfect effect. Finally, by contrastively analyzing the modeling of the liquid flow-flied of high pressure microfluidics based on several shapes micro-channel and several structure parameter of it, we know that the micro-channel with impinging stream shape can get more tremendous force, the micro-channel with less length in inlet and outlet and less fork angle can make the equipment get better effect, designing and utilizing the testing equipment we make experiment to test the effect of it, and we find that the equipment can make SiO₂ super-fine, the pressure have great influence to the effect. This research affords reliable reference and provides scientific basis for further development.