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[Innovation study on Chinese medicinal materials ultrafine grinding by impacting and attriting in jet mill]
1School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China. yejing@public.wh.hb.cn
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.
