PRODUCTION OF PULVERIZED POWDER

摘要

PURPOSE: To efficiently regulate pulverized powder formed by pulverizing cellulosic materials to a specific grain size or below and to improve the yield of this pulverized powder by improving a technique for pulverizing the cellulosic materials and a technique for sieving the grain sizes after pulverization. CONSTITUTION: The cellulosic materials are subjected to rough primary pulverizing and the primarily pulverized materials subjected to the primary pulverizing is subjected to secondary pulverizing. The secondarily pulverized materials subjected to the secondary pulverizing are subjected to sieving. The materials selected by this sieving are formed as the pulverized powder. The materials which are not selected by the sieving are again subjected to the secondary pulverizing.