山西某蚀变斑岩型金矿选矿试验研究
Experimental Study on Beneficiation of an Altered Porphyry Gold Deposit in Shanxi
摘要: 山西某蚀变斑岩型金矿中矿石原矿含金1.10 g/t，金矿物嵌布粒度较细，主要与长石、石英、菱锰矿等脉石矿物紧密嵌生，需将脉石矿物中的金解离或暴露出来，才可将其与黄铁矿一起浮选回收。针对该矿石特点，通过组合捕收剂戊基黄药 + 丁铵黑药的协同效应，采用“一粗两精两扫”的工艺流程，最终获得含金49.70 g/t，回收率为85.92%的浮选金精矿，尾矿金品位降低至0.15 g/t，指标优良。
Abstract:
The ore in an altered porphyry gold deposit in Shanxi contains 1.10 g/t gold. The gold minerals have fine grain size and are closely embedded with gangue minerals such as feldspar, quartz and rhodochrosite. The gold is dissociated or exposed before it can be floated and recovered together with pyrite. According to the characteristics of the ore, by combining the synergistic effect of the col-lector amyl xanthate and ammonium butyl dithiophosphate, the principle process of one cobbing and two cleans are adopted, and finally the gold grade of flotation concentrate is 49.70 g/t, and the recovery is 85.92%. The gold grade of tailings reduced to 0.15 g/t. These are excellent indicators.
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