METHOD OF CONCENTRATION OF COPPER-CONTAINING SLAGS Russian patent published in 1999 - IPC

FIELD: mineral concentration, in particular, concentration of raw materials of technogenic deposits, more specifically, flotation of copper-containing slags of reverberating furnaces. SUBSTANCE: method includes crushing of initial slag; three-stage grinding; ground product classification; main and control copper flotation; cleaning flotation of foam product of main copper flotation. The first stage of grinding is carried out in open cycle. Control copper flotation is carried out with preliminary complete grinding of tailings of main copper flotation in ball mill. Control copper flotation is effected in field of low turbulence of pulp flows and under conditions of high aeration of pulp, for instance, in column-type pneumatic flotation machines with air flow rate of 1 cu.m per 1 cu.m of pulp and air pressure of 0.3-0.35 MPa. EFFECT: utilized raw materials of technogenic deposits and higher recovery of copper into copper concentrate. 6 cl, 1 dwg