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金属矿山 ›› 2017, Vol. 46 ›› Issue (06): 89-93.

• 矿物工程 • 上一篇    下一篇

甘肃早子沟金矿石选矿试验

董再蒸1,2,张淑敏1,高鹏1,3,刘思莹1,韩跃新1   

  1. 1.东北大学资源与土木工程学院,辽宁 沈阳 110819;2.东北大学新材料技术研究院,辽宁 沈阳 110819;3.山东招金集团有限公司,山东 烟台 265400
  • 出版日期:2017-06-15 发布日期:2017-09-27
  • 基金资助:

    山东省博士后创新项目(编号:201401004)。

Beneficiation Experiment of Gold Ore from Zaozigou,Gansu

Dong Zaizheng1,2,Zhang Shumin1,Gao Peng1,3,Liu Siying1,Han Yuexin1   

  1. 1.School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;2.Institute of Advanced Material Technology,Northeastern University,Shenyang 110819,China;3.Shandong Zhaojin Group Co.,Ltd.,Yantai 265400,China
  • Online:2017-06-15 Published:2017-09-27

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Na2CO3为pH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FeS2、FeAsS、Sb2S3被富集到了浮选精矿中;浮选尾矿在液固比为4、Na2S2O3·5H2O用量为0.20 mol/L、CuSO4用量为0.018 75 mol/L、(NH4)2SO4用量为0.05 mol/L、NH3·H2O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。

关键词: 金矿石, 浮选, 硫代硫酸钠, 浸出

Abstract: There is 4.09 g/t gold in a gold ore in Gansu,contents of Cu,Pb,Zn,Fe and Sb are too low to have value.Main metallic minerals are pyrite,arsenopyrite,stibnite and limonite.To recovery valuable element Au,flotation-flotation tailings sodium thiosulfate leaching tests were conducted.Results show that gold concentrate of 56.78 g/t Au and recovery of 71.27% were got through one roughing,two cleaning and two scavenging closed-circuit flotation process under grinding fineness of -0.074 mm is 90%,Na2CO3 as pH regulator,isoamyl xanthate + butylamine aerofloat as collector and 2# oil as foaming agent.Substances,such as FeS2,FeAsS,Sb2S3,that affect gold leaching were enriched in concentrate.Flotation tailings treated with liquid-solid ratio of 4,Na2S2O3·5H2O dosage of 0.20 mol/L,CuSO4 dosage of 0.018 75 mol/L,(NH4)2SO4 dosage of 0.05 mol/L,and NH3·H2O dosage of 1.0 mol/L,pulp pH of 9.5,stirring speed of 450 r/min and leaching for 3 h,gold leaching rate of 67.05%,total gold recovery rate of 90.52% was obtained.Experiment results can provide technical basis for comprehensive utilization of the gold ore.

Key words: Gold ore, Flotation, Sodium thiosulfate, Leaching