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Abstract
The effects of different physical parameters such as pulp density, aeration conditions, and impeller speed on the performance of coal-oil assisted gold flotation were investigated in this study. The experiments were conducted using samples taken from an epithermal gold ore deposit. The results demonstrated that increasing the solid concentration in feed pulp slightly improves recovery of gold particles, but accompanied by significant decreases in concentrate grade. At low aeration conditions gold recovery was relatively low whereas at high aeration conditions the selectivity was poor. The use of higher level of agitation in the agglomerate re-formation stage brought about an increase in gold recovery; however, gold grade of the concentrates tended to decline. Gold grade of the concentrate was significantly increased by reloading of the coal oil agglomerates; on the other hand, substantial decreases were observed in total gold recovery after each successive cycle.
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