Objective: To introduce a method of ultrafine grinding by impacting and attriting in jet mill, which can solve effectively about grinding efficiency and suitability for variant Chinese medicinal materials.
Method: Raw materials are uniformly distributed to multiple nozzles and accelerating pipes, and high-speed impact on a rotary target with surface of various friction veining, so Chinese medicinal materials are pulverized through recombination action of impaction and attrition, and ultrafine powder are separated by internal classifier.
Result: The grinding experiment go to show that average fineness of several kinds of typical Chinese medicinal materials powder are 2.0 - 12.7 microns.
Conclusion: This method has obvious advantage of suitability and efficiency for ultrafine grinding Chinese medicinal materials.