黄金科学技术 ›› 2023, Vol. 31 ›› Issue (1): 113-122.doi: 10.11872/j.issn.1005-2518.2023.01.154
杨玮1,2,3(),叶金秋1,2,3(),龙涛1,2,3,邓莎1,2,3,王文涛1,2,3
Wei YANG1,2,3(),Jinqiu YE1,2,3(),Tao LONG1,2,3,Sha DENG1,2,3,Wentao WANG1,2,3
摘要:
为实现选金尾矿资源中金的高效回收,对陕西省某含硫黄金尾矿(硫含量为11.60%、金含量为1.5×10-6、包裹金含量为84.77%)进行预处理—浮选预富集—浮选中矿再磨—浸出的选冶联合工艺研究。结果表明:机械搅拌、超声及添加H2SO4、Na2S预处理均可以改善金矿物表面性质,从而提高浮选回收率;原料添加H2SO4预处理后经2次粗选得到金品位为6.94×10-6、金回收率为87.22%的混合粗精矿产品,浮选回收率较无预处理时提高了10.52%,实现了裸露金和硫化物包裹金的预先富集;粗精矿经一次抑硫精选,获得金品位为21.65×10-6的金精矿;在-0.038 mm含量占95%、NaCN质量浓度为0.16%和浸出时间为48 h的条件下,精选中矿直接浸出率为91.48%,实现了包裹金的分离回收;最终得到金的选冶联合总回收率为80.45%,实现了高硫包裹型难处理金尾矿资源的高效回收。
中图分类号:
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