Multiple regression method (eq.(1)), in order to relate characteristic X-ray intensities (I) with ore grade (X) or pulp density (X), were applied to the data obtained by six channel fluorescent X-ray analyser in Kuroko flotation plant (ore feed rate: 500kg/h) in our institute.X=a1ISb+a2IPb+a3IZn+a4ICu+a5IFe+a6…(1) where a1-a6; coefficients Pb, Zn, Cu, Fe and pulp densities were analysed by this method usingfollowing flotation pulp. 1 flotation feed, 2 rougher concentrate, 3 rougher tailing, 4 scavenger concentrate, 5 final tailing
The same coefficients of eq.(1) were used to the pulp 1, 3, 5 above-described, because ore grades and pulp densities do not differ each other.
Peculiar coefficients of eq.(1) were used to the pulp 2 and 4 respectively since their pulp densities were too low.
As a result of these procedure, the calculated values by eq.(1) showed sufficient accuracy for process analysis.
