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现在,国内外多半采用有用矿物和废石两者的选出率来表达光电选矿的分选效率,这样的表达方式不能使读者一目了然。作者建议按照下式E=ε_1+ε_2-100 (1)计算光电选效率。式中E为光电选矿的分选效率;ε_1为有用矿物选出率;ε_2为废石选出率;100为常数。事实上这是汉考克公式一种表现形式。若以α、β、(?)代表原矿、精矿、尾矿中有用矿物含量,相应产品中废石含量分别为100-α、100-β、100-(?),γ为精矿产率,则式(1)可写
At present, most domestic and foreign countries use the selection rate of both useful minerals and waste rock to express the separation efficiency of photoelectric beneficiation. Such an expression can not make the reader clear at a glance. The authors propose to calculate the photoelective efficiency according to the following equation E = ε_1 + ε_2-100 (1). Where E is the separation efficiency of the photoelectric beneficiation; ε_1 is the useful mineral selection rate; ε_2 is the waste rock selection rate; 100 is a constant. In fact, this is a manifestation of the Hancock formula. If α, β, (?) Represent the content of useful minerals in the ore, concentrate and tailings, the waste products in the corresponding products are 100-α, 100-β and 100- respectively, γ is the concentrate yield, Then equation (1) can be written