抄録
The separability of mineral processing products has been analysed in terms of mathematical statistics. It has been shown that the distribution of extraction of constituents is represented by the binomial distribution and in cases of a large number of trials and smaller probability of success in a single trial as in those of flotation the binomial distribution is approximated by the Poisson distribution. Further it has been verified that the so-called "first order kinetics" equation of flotation formerly obtained experimentally or, by chemical kinetics analogies or chemical engineering mass transfer concepts, etc. can be derived from mathematical statistics. It follows that Prof. M. Digre's "separarion factor" and our "concentrability function" and "concentrability coefficient" can be introduced from the basic equation. It may be noted that Prof. Digre's "separation factor" involves recovery and time factor but our "concentrability function" and "concentrability coefficient" in terms of fractions of recovery and quantity of concentrate do not involve time factor and are convenient for prediction or evaluation of concentration processes as shown in examples of Tables 1 and 2.
