甘肃早子沟金矿石选矿试验

发布时间：2018-03-31 21:42

本文选题：金矿石　切入点：浮选　出处：《金属矿山》2017年06期

【摘要】：甘肃早子沟金矿石金品位为4.09 g/t,铜、铅、锌、铁、锑等含量较低,不具有回收价值。矿石金属矿物主要为黄铁矿、毒砂、辉锑矿和褐铁矿等。为回收有价元素金,采用浮选—浮选尾矿硫代硫酸钠浸出工艺进行试验。结果表明:在磨矿细度为-0.074 mm占90%时,以Na_2CO_3为p H调整剂、异戊基黄药+丁胺黑药为捕收剂、2#油为起泡剂,经1粗2精2扫闭路浮选,获得的浮选精矿金品位为56.78 g/t,回收率为71.27%,且影响金浸出的FeS_2、FeAsS、Sb_2S_3被富集到了浮选精矿中;浮选尾矿在液固比为4、Na_2S_2O_3·5H_2O用量为0.20 mol/L、CuSO_4用量为0.018 75mol/L、(NH_4)_2SO_4用量为0.05 mol/L、NH_3·H_2O用量为1.0 mol/L、矿浆pH=9.5、搅拌转速为450 r/min、反应时间为3 h条件下浸出,获得了金浸出率为67.05%,金总回收率为90.52%的指标。试验结果可以为早子沟金矿石的合理利用提供技术依据。
[Abstract]:The gold grade of the gold ore in Zizigou gold ore in Gansu Province is 4.09 g / t. The contents of copper, lead, zinc, iron and antimony are relatively low and have no value for recovery. The ore metal minerals are mainly pyrite, arsenopyrite, stibnite and limonite. The leaching process of sodium thiosulfate from flotation flotation tailings was studied. The results showed that when the fineness of grinding was -0.074 mm / 90, Na_2CO_3 was used as pH adjuster and isoamyl xanthate butylamine black as collector and butylamine as foaming agent. The gold grade of flotation concentrate is 56.78 g / t, the recovery rate is 71.27, and the FeS2FeAsS-1 / S2S3, which affects the leaching of gold, is enriched into the flotation concentrate. For flotation tailings, the dosage of 0.20 mol / L CuSO4 is 0.20 mol / L CuSO4 is 0.20 mol / L / L CuSO4 = 0.018 mol / L ~ (-1) / L ~ (-1) / L ~ (-1) / L ~ (-1) / L ~ (-1) S / L ~ (-1) / S ~ (-1) / S ~ (-1) / S ~ (-1) / S _ 2 / S _ 2 / S _ 2 / S _ 2 / S _ 2 / S _ 2 / S _ 2 / S _ 2 / S _ 2 / S _ 2 / S _ 2 / S _ 2 / S _ 2 / S _ 2O. The gold leaching rate is 67.05 and the total gold recovery is 90.52%. The experimental results can provide a technical basis for the rational utilization of gold ores in Zaozigou.
【作者单位】：东北大学资源与土木工程学院;东北大学新材料技术研究院;山东招金集团有限公司;
【基金】：山东省博士后创新项目(编号:201401004)
【分类号】：TD923;TD953

【参考文献】