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金属矿山 ›› 2008, Vol. 38 ›› Issue (10): 56-59+63.

• 矿物工程 • 上一篇    下一篇

某金矿金浸出率不高的原因及解决措施

杨磊,刘厚明,刘飞燕,潘志兵   

  1. 中国地质科学院矿产综合利用研究所
  • 收稿日期:2009-08-20 出版日期:2008-10-15 发布日期:2011-07-13

Causes and Solution for the Low Gold Leaching Rate at a Certain Gold Mine

Yang Lei,Liu Houming,Liu Feiyan,Pan Zhibing   

  1. Institute of Multipurpose Utilization of Mineral Resources, CAGS
  • Received:2009-08-20 Online:2008-10-15 Published:2011-07-13

摘要: 某金矿采用堆浸工艺,金的浸出率一直较低,改用全泥氰化浸出工艺进行试验,金的浸出率也没有明显的提高。为此,对该矿矿石进行了工艺矿物学研究,查明了影响金浸出的主要因素为雄黄、雌黄等。根据工艺矿物学研究结果,采用原矿先经浮选除去雄黄、雌黄等硫化物,浮选精矿预处理后氰化浸出,浮选尾矿直接氰化浸出的方案进行试验,金的总浸出率达到88.52%,较原矿直接全泥氰化浸出提高25.02个百分点。

关键词: 金矿, 工艺矿物学, 雄黄, 雌黄, 浮选, 氰化浸出

Abstract: A gold mine adopted a heap leaching process but the gold leaching rate had been low. No evident improvement was made when a full-ore cyaniding leading process was tested. A process mineralogical study was thus made and it was founded that it is mainly realgar and orpiment that affect the gold leaching. Based on this result, a test was made, in which the run-of-mine ore was first treated by flotation to remove the sulfides such as realgar and orpiment, and the flotation concentrate was treated by cyaniding leaching after a pre-treatment while the flotation tailing was directly fed to cyaniding leaching. The total gold leaching rate reached 88.52%, an increase of 25.02 percentage points compared with that of direct cyaniding leaching of run-of-mine ore.

Key words: Gold ore, Process mineralogy, Realgar, Orpiment, flotation, Cyaniding leaching