要精确地评定选矿厂生产状况的好坏是颇为复杂的事,因为要考察的因素较多。例如精矿产量是越多越好,精矿质量、回收率高是好,低是差,水、电、钢球衬板单耗低的是好,高的是差,……等等。在限定的考察时间内(一天的三个班或一个月甚至一年内三个班组、这个月与那个月)各种指标总是有参差不齐的,各段考察时间的诸种指标都是有高有低,不可能(至少极难)出现这段时 To accurately assess the quality of the dressing plant is quite complicated, because there are many factors to be investigated. For example, concentrate production is the better, the quality of concentrate, high recovery rate is good, low is poor, water, electricity, low consumption of the ball liner is good, high is poor, and so on. During the limited study period (three classes a day or three classes a month or even a year, this month and the month) there are always various indicators of various indicators, the various indicators of the inspection time is High and low, impossible (at least extremely difficult) this time