摘要
哥伦比亚某含铜金银矿矿石中有价元素金、银、铜含量分别为7.61 g/t、44.62 g/t和0.10%。原采用重选—重选尾矿直接氰化浸出工艺,银浸出率低、铜大量浸出,贵液后续处理困难。针对以上问题,采用重选—重选尾矿优先浮铜—浮铜尾矿浮选金银—金银精矿氰化浸出的选冶联合工艺开展试验研究。结果表明:①该矿石中硫化矿物主要为黄铁矿,含金矿物以银金矿为主,含银矿物主要为锑黝铜矿,铜矿物主要为黄铜矿。②矿石采用两段尼尔森重选—超级选金机精选的重选工艺,可获得综合重选金精矿含金34.10 kg/t、含银9.34 kg/t、含铜0.072%,金回收率44.56%,银回收率2.06%、铜回收率0.0066%。③对重选尾矿采用优先浮铜工艺,在磨矿细度为-74μm占64%的条件下,以Na2CO3为调整剂、Z-200为捕收剂,经2粗2精,可获得铜品位24.47%、金品位402.4 g/t、银品位8841.6 g/t、铜回收率63.92%、金回收率25.62%、银回收率55.96%的铜精矿。④采用选冶联合工艺流程处理该矿石,全流程试验可获得金综合回收率88.21%、银综合回收率77.02%、铜回收率63.92%的指标。不仅回收了铜矿物,降低了铜浸出量和氰化钠单耗,还改善了贵液后续处理过程。同时,银综合回收率提升明显,极大降低了氰化尾渣的处理量。
The contents of value elements of a copper-containing gold-siliver ores in a Colombia are gold of 7.61 g/t,silver of 44.62 g/t and copper of 0.10%,respectively.The original process is the combined process of gravity separation and direct cyanide leaching for gravity separation tailings,causing the problems of low leaching rate of silver,a large amount of copper leaching and difficult in the subsequent treatment of pregnant solution.In view of the above problems,the combined process of beneficiation and metallurgy test research were conducted with gravity separation,copper prior flotation for gravity separation tailings,gold-silver flotation for copper flotation tailings and cyanide leaching of gold-silver concentrate.The results showed that:①The sulfide minerals in the ores is mainly pyrite,and the gold-bearing minerals are mainly electrum.The silver-bearing minerals are mainly antimony tetrahedrite,and the copper minerals are mainly chalcopyrite.②A comprehensive gold concentrate containing gold of 34.10 kg/t gold,silver of 9.34 kg/t,copper of 0.072%,gold recovery rate of 44.56%,silver recovery rate of 2.06%and copper recovery rate of 0.0066%could be obtained by two-stage gravity separation process with Nelson gravity separation roughing and super-panner cleaning.③Copper prior flotation process is adopted for gravity separation tailings.Under the condition of grinding fineness of-74μm accounting for 64%,Na2CO3 and Z-200 as regulator and collector respectively,copper concentrate with copper grade of 24.47%,gold grade of 402.4 g/t,silver grade of 8841.6 g/t,copper recovery rate of 63.92%,gold recovery rate of 25.62%,silver recovery rate of 55.96%was obtained after two roughing and two cleaning process.④The total recovery of gold,silver and copper was 88.21%,77.02%and 63.92%,respectively,during the whole process test with combined process of beneficiation and metallurgy.Not only the copper minerals were recovered,the copper leaching amount and sodium cyanide unit consumption decrease,but also the subsequent
作者
陈水波
王乾坤
孙忠梅
徐其红
李黎婷
吴维新
CHEN Shuibo;WANG Qiankun;SUN Zhongmei;XU Qihong;LI Liting;WU Weixin(State Key Laboratory of Comprehensive Utilization of Low-grade Refractory Cold Ores,Xiamen 361101,China;Zijin Mining Group Xiamen Zijin Mining and Metallurgy Technology Co.,Ltd.,Xiamen 361101,China)
出处
《金属矿山》
CAS
北大核心
2021年第11期86-90,共5页
Metal Mine
关键词
含铜金银矿
尼尔森重选
优先浮铜
选冶联合工艺
铜综合回收率
copper-containing gold-silver ores
Nelson gravity separation
copper prior flotation
combined process of beneficiation and metallurgy
total recovery rate of copper
