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根据催化裂化催化剂生产的实际需要，经过实验室多次分级性能试验和结构改进，总结出了一套细粉分级器（ Ｌ Ｈ Ｃ Ｆ 型）的设计方法；依此方法为长岭炼油化工总厂催化剂厂、兰州炼油化工总厂催化剂厂设计了两套裂化催化剂生产装置，成功地将来料中小于 ２０ μｍ 细粉分布为约１８％ 和约 ３２％ 的催化剂，降低到 １．８％ 和 ２．７％ ，而被分出的细粉中大于 ２０ μｍ 有效组分相当少，牛顿分级效率为 ８８％ ～８９％ ，一次开工调试成功，使催化剂成品的粒度分布符合国际市场裂化催化剂的要求。
According to the actual needs of catalytic cracking catalyst production, through the laboratory grading performance test and structural improvement, summed up a set of fine powder classifier (L H C F type) design method; according to this method Changling Refining and Chemical Plant Catalyst Plant, Lanzhou Refining and Chemical Plant Catalyst Plant designed two sets of cracking catalyst production plant, successfully incoming less than 20 μm fine powder distribution of about 18% and about 32% of the catalyst, reduced to 1.8% and 2 .7%, while the fractionated powder greater than 20 μm effective component is relatively small, Newton classification efficiency of 88% to 89%, a commissioning start successfully, so that the finished catalyst particle size distribution in line with international market cracking catalyst requirements.