Measurement method of coarse grain ratio, flotation method

摘要

PROBLEM TO BE SOLVED: To efficiently determine the ratio of coarse particles composed of agglomerated particles formed by aggregating fine particles regardless of the apparent particle size among the powder particles used for the treatment of flotation. Provides a method of measuring. The present invention is a method for measuring the ratio of coarse particles composed of agglomerated particles contained in powder particles, wherein the powder particles are sieved and sampled for each sieved division. Based on the step S2 in which each powder particle for each division is imaged with a microscope and the captured observation image is analyzed using an image analyzer, and the analysis of the observation image, the minimum of the sieve division is for each sieve division. It has a step S3 for measuring the number T of all particles other than particles having a particle size smaller than the particle size and the number S of agglomerated particles, and a step S4 for calculating the coarse particle ratio represented by the following formula. .. Coarse grain ratio (%) = (total of S in each sieve division) / (total of T in each sieve division) x 100 [Selection diagram] Fig. 1