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新疆某金矿选矿试验研究

2020-08-20李俊平

写真地理 2020年14期

李俊平

摘 要: 对新疆某金矿进行了详细的选矿试验研究。该金矿石属于蚀变花岗岩型金矿,主要造岩矿物包括石英、钠长石、钾长石、霓石、钠铁闪石和铁叶云母,矿石硬度大。矿石中矿物种类较少,含少量自然金、银以自然银及辉银矿物为主,矿物中硫化矿物含量较少。通过试验与硫化银铜矿物混合处理,解决了该类型金矿的选矿研究。

Abstract: A detailed beneficiation test study was conducted on a gold mine in Xinjiang. The gold ore belongs to the altered granite one. The main rock-forming minerals include quartz, albite, potash feldspar, aegirine, arfvedsonite, and eastonite, with a high ore hardness. There are few types of minerals in the ore, containing a small amount of natural gold and silver, which mainly consists of natural silver and bright silver minerals, and the minerals contain fewer sulfide minerals. Through experiments and mixed treatment with silver copper sulfide minerals, the beneficiation study of this type of gold ore was solved.

【中图分类号】 TD923      【文献标识码】A     【文章编号】1674-3733(2020)14-0245-02

1 矿石性质

新疆某金矿平均原矿品位Cu:0.006%、Ag 16.5g/t、Au467g/t。该金矿石属于蚀变花岗岩型金矿,主要由霓石钠闪石英碱性长石正长岩、霓石钠闪碱性长石花岗岩、黑云母碱性长石正长岩3种岩石类型,矿石硬度大。主要造岩矿物包括石英、钠长石、钾长石、霓石、钠铁闪石和铁叶云母,矿石硬度大。矿石中矿物种类较少,含少量自然金、银以自然银及辉银矿物为主。矿物中硫化矿物含量较少,在初步浮选探索试验时,浮选泡沫较少,矿物不附着于气泡上。为进一步开展选矿研究工作,对该矿进行了多元素分析,结果如下表1:

2 实验室试验

2.1 初步探索试验

以据该矿石的性质研究结论,可提供回收的金属矿物为金和银矿物。该矿石中矿物嵌布粒度较细,石英包裹较多,金银矿物单体解离较差,属于难选矿石类型。根据原矿的性质,在前期探索的基础上,拟采用“金银混合浮选”工艺回收该矿石中的铜银矿物。该工艺主要是提高目的矿物的单体解离度,采用高效硫化铜矿物捕收剂将易浮的金银矿物浮出,得到金银混合精矿。……

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