黄金科学技术 ›› 2021, Vol. 29 ›› Issue (5): 761-770.doi: 10.11872/j.issn.1005-2518.2021.05.152
• 采选技术与矿山管理 • 上一篇
Tianjiao WU(),Huan CAO(
),Fangyin NIU,Jianping JIN,Haijun WANG,Jun CHEN,Yaru WEI
摘要:
某含碳微细粒金矿金含量为5.56×10-6,大部分金呈微细粒包裹于含碳硅质板岩碎屑中,有机碳和石墨含量分别为1.33%和1.50%,是典型的含碳难处理金矿。为实现该含碳难处理金矿的浮选预富集,进行了先浮选碳质后浮选金和直接浮选金等不同工艺流程的探讨试验,并在最佳流程基础上进行了直接浮选工艺的条件优化试验。结果表明:采用直接浮选工艺可以获得品位较高的金精矿,当磨矿细度为-0.074 mm含量占比为85%时,可获得金品位为30.01×10-6,回收率为76.18%的金精矿,金回收率较先浮选碳质后浮选金工艺明显提高;调整工艺流程结构,采用一段粗磨浮选—扫选精矿再磨浮选工艺,可获得金品位为33.45×10-6、金回收率为79.93%的金精矿。该流程选矿指标相较于一次磨矿细度为-0.074 mm含量占比为85%的指标更优,是适宜含碳微细粒难处理金矿石的处理流程。
中图分类号:
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