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针对常用重介旋流器的分选下限在一般工业生产中仅达到＋０．５ｍｍ的情况，本文提出，适当修改常规重介流程，可以降低重介分选下限，减少重复分选，提高选煤的经济效益。
In view of the fact that the lower limit of separation of common HM cyclone is only + 0.5mm in general industrial production, this paper suggests that proper modification of conventional HM process can reduce the lower limit of HM separation, reduce repeated sorting and improve coal preparation The economic benefits.