title: [Innovation study on Chinese medicinal materials ultrafine grinding by impacting and attriting in jet mill].
abstract: 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.
  
  
  METHODS
  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.
  
  
  RESULTS
  The grinding experiment go to show that average fineness of several kinds of typical Chinese medicinal materials powder are 2.0 - 12.7 microns.
  
  
  CONCLUSIONS
  This method has obvious advantage of suitability and efficiency for ultrafine grinding Chinese medicinal materials.
authors.affiliation: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China. yejing@public.wh.hb.cn
authors.forename: Y E
authors.initials: YE
authors.lastname: Jing
mesh_terms: D031668:Gastrodia; D005894:Panax; D010316:Particle Size; D010946:Plants, Medicinal; D011208:Powders; D027561:Salvia miltiorrhiza; D013678:Technology, Pharmaceutical / Q000295:instrumentation / Q000379:methods*
chemical_list: D011208:Powders