高压水射流超细粉碎的压力与粒度的关系

RELATIONSHIP BETWEEN PRESSURE AND PARTICLE SIZEIN ULTRA-FINE COMMINUTING MICAWITH HIGH PRESSURE WATER JET

从理论分析和实验研究两方面，对高压水射流超细粉碎压力与粒度的定量关系进行了研究。根据流体力学理论，推导出粉体颗粒的动能与射流压力成正比；再由Ｒｉｔｔｉｎｇｅｒ的“表面积假说”，得出高压水射流超细粉碎的压力与产品调和平均粒度倒数和给料调和平均粒度倒数之差成正比；并在不同压力和给料粒度下，用水射流对云母粉进行了超细粉碎实验。实验结果与理论结果相当吻合。

This paper presents theoretical analysis and experimental study on the relationship between pressure and particle size in ultra--fine comminuting with high pressure water jet. Atfirst, based on the theory of fluid mechanics, it is deducted that the energy of powder particle is directly proportional to the pressure of water jet. Secondly, based on Rittinger's theory, it is shown that the pressure of water jet for ultra-fine comminuting is directly proportional to the difference between reciprocal value of product and feed mean particle size. Finally, under different pressure and different feed particle size, experiments of ultra-fine comminuting with water jet were carried out,the experimental result is in good agreement withthe theoretical result.