本文主要介绍大气脉动反吹菱形宽扁带收粉器的原理、特点及该收粉器在炼铁厂喷煤3#制粉系统改造中的应用情况。 This paper mainly introduces the principle, characteristics and application of the air pulsating counter-blown rhombic wide flat belt powder collector in the transformation of pulverizing system of No. 3 pulverized coal injection in ironmaking plant.