FLUIDIZED BED TYPE PULVERIZING AND CLASSIFYING MACHINE, POWDER PULVERIZING AND CLASSIFYING SYSTEM, AND POWDER PULVERIZING AND CLASSIFYING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a new fluidized bed type pulverizing and classifying machine which has a simple structure, flexibility, and enhanced capability, more particularly a fluidized bed type pulverizing and classifying machine which reduces soaring up of a material to be pulverized in a classifying chamber in spite of feeding of a large amount of the material to be pulverized, prevents the solid-gas ratio around a classifying rotor arranged in the upper part from rising abnormally, eventually obviates the degradation in the classification accuracy, and is consequently free from over pulverization and inclusion of coarse powder into pulverization finished powder and is free from the degradation in production capacity, and a powder pulverizing and classifying method using the same.;SOLUTION: The fluidized bed type pulverizing and classifying machine including a pulverizing zone provided with a pulverizing nozzle and a classifying zone provided with the classifying rotor has a mechanism for supplying air (secondary air) which is separate from the compressed air jetted from the pulverizing nozzle.;COPYRIGHT: (C)2004,JPO&NCIPI