Abstract
The present investigation was undertaken in order to make clear the adsorption property of α-terpineol and cineol onto the mineral surface and to clarify these influences on the floatability of mineral particles surface-chemically.The gas chromatographic method was successfully used to analyze the concentration of a frother in the solution to determine the adsorption of α-terpineol and cineol on galena surface. The wettability of galena to frother was determined by capillary penetration tests. The floatability of galena was measured with a bubble pick up tube.The adsorption density of frother molecules on galena increased with increasing the concentration of a frother in the solution. The adsorption quantities of cineol on galena were larger than those of a-terpineol in either case with or without xanthate addition in the solution. The critical flotation curves of galena were determined when xanthate was used alone and also was used together with one of the frothers. The floatability of galena with xanthate increased greatly in the presence of frother, and decreased in the following order: cineol+ xanthate>α-terpineol+xanthate>xanthate.From these results, it was confirmed that the adsorption property of frother molecules onto the mineral related closely with the floatability of mineral and consequently the frother adsorption should play an important role in flotation.
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