Study on the Integrative Utilization of Cyanide Tailings of Polymetallic Sulfide Ore of Gold and Silver
In this paper, based on the experiment on pure minerals, namely, galena, sphalerite and pyrite, it is concluded that the appropriate pH range for galena flotation is 8.5-10.5, that for sphalerite flotation is 7-10.5 and for pyrite is 2.5-6.5. For galena, sphalerite and pyrite, butyl xanthate has a better collecting performance than ammonium dibutyl dithiophosphate. Both Na2SO3 and ZnSO4 have a relatively weak inhibitory effect on galena. As for sphalerite, the mixing of Na2SO3 and ZnSO4 has a better inhibitory effect than when they are used alone, with the best inhibitory effect obtained when the proportion of Na2SO3 and ZnSO4 is 1:2 and their dosages are respectively 100mg/L and 200mg/L. In zinc flotation, CuSO4 demonstrates an apparent activating effect on the inhibited sphalerite with its appropriate dosage at 2*10 -4 mol/L. In actual separation and selection of ore, when the grades of lead, zinc and silver in cyanide tailings are respectively 2.41%, 3.77% and 272g/t, a fairly good index is obtained where the Pb concentrate is of a grade of 33.41% with its silver grade of 4051.57g/t and the grade of Zn concentrate is 59.67% with its silver grade of 798.08g/t.
X. Q. Liu et al., "Study on the Integrative Utilization of Cyanide Tailings of Polymetallic Sulfide Ore of Gold and Silver", Advanced Materials Research, Vols. 343-344, pp. 43-55, 2012