Dressability of Old Gold-Bearing Tailings by Flotation
V. I. Bragin1,2, E. A. Burdakova1,2, A. A. Kondrat’eva1, A. A. Plotnikova1,2, I. I. Baksheeva1
1Siberian Federal University, Krasnoyarsk, 660041 Russia
2Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036 Russia
Keywords: флотационный метод обогащения, лежалые хвосты, техногенное минеральное сырье, реагентный режим флотации, извлечение, хвостохранилища, исследование на обогатимость, Flotation, old tailings, mining waste, reagent mode, recovery, tailings pond, dressability study
Abstract
The research findings on floatability of old gold-bearing tailings are presented. The complex material constitution and process features of processing waste are governed by difference in treatment of various ore types (sulfide, oxidized and mixed) at processing plant, as well as with supergene processes in the tailings pond. Feasibility of re-flotation of tailings is discussed. it is found that short-term mechanical activation of tailings in a mill with the subsequent flotation (at the adjusted reagent mode as against the current technology) results in gold recovery of 29.0 to 45.4% in flotation concentrate at the residue content of metal in rejects at the level of 0.2-0.3 g/t.
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