白银露天剥离硫化铜矿微生物堆浸工业试验研究

Research on Normal Temperature Bacteria Heap Leaching of Baiyin Copper Sulfide Dump

针对白银矿露天含铜废石的特点,在实验室柱浸试验研究的基础上,进行生物堆浸工业试验,试验按清水循环、稀酸预浸、生物浸出三个阶段进行,结果表明,生物浸出时间300d(含20d稀酸预浸时间),Cu浸出率为49.91%,随着浸出时间的延长浸出率还有上升的趋势。本试验中所取得的工艺参数揭示了白银含铜废石生物浸出规律及过程控制因素,对同类矿种资源生物堆浸具有指导意义。

According to the characteristics of white silver open-air copper waste stone, column leaching experiments in the laboratory, on the basis of biological heap leaching industrial test, test according to the water cycle, dilute acid leaching, biological leaching three phases, the results showed that biological leaching time 300 d（including 20 d dilute acid leaching time beforehand）, Cu leaching rate was 49.91%, with the extension of leaching time and leaching rate rising trend.The process parameters obtained in the experiment reveals that the silver copper waste rock biological leaching rule and process control factor, biological heap leaching of same kind of mineral resources has guiding significance.