Efficient separation and recovery technology of a refractory Carlin-type gold ore
Carlin-type gold ore flotation is one of the difficulties in beneficiation and also one of the research hotspots.A certain gold deposit is of Carlin-type with complex ore properties and is disseminated in subsieve particles with high content of carbonate minerals,clay minerals and carbonaceous minerals.The gold-bearing minerals have poor floatability,making the recovery of gold extremely difficult.Starting from the key technical challenges that seriously affect flotation indicators,such as high content of gangue slime that is difficult to suppress,subsieve disseminated gold,and large differences in floatability of gold-bearing minerals,this study adopts deep dispersion depression-activation synergism-flotation at a different velocity and utilizes the synergistic effect of the collector to effectively reduce the circulating load of middling ore and realize efficient separation and recovery of gold minerals.A gold concentrate with a gold grade of 24.61 g·t-1 and a gold recovery rate of 80.42％could be obtained by the flotation closed-circuit test.After adopting this technology,there is no need to remove the slime beforehand,which solves both the problems of low gold grade and recovery in the past,reduces the operation process,and provides technical support for solving the recovery of sluggish gold resources.
Carlin-type gold oredeep dispersion depressionactivation synergismflotation at different velocitiessynergistic effectwithout desliming
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