摘要
内蒙古某金矿石金品位为2.83 g/t,由于原有氰化浸出工艺所产生的尾渣对环境具有较大污染,因此现阶段寻求一种绿色清洁的选矿方法至关重要。基于矿石中金的嵌布特征,开展了尼尔森重选—浮选联合工艺试验研究。结果表明:在磨矿细度为-0.043 mm占87%、重力倍数为80 G、流态化水量为3 L/min的条件下进行尼尔森重选,可以获得金品位为35.44 g/t、金回收率为55.85%的重选金精矿和金品位为1.34 g/t的重选尾矿,对重选尾矿进行2粗2精2扫、中矿顺序返回的闭路浮选,可以获得金品位为13.80 g/t、金回收率为31.38%的浮选金精矿。矿石经尼尔森重选—浮选联合工艺处理后,获得了金总回收率为87.24%、金品位为22.69 g/t,尾矿金品位为0.42 g/t的指标。研究结果对于选厂的无氰选金工艺推广具有重要的参考价值。
The gold grade of a gold ore in Inner Mongolia is 2.83 g/t.Because the tailings produced by the original cyanide leaching process have great pollution to the environment,it is very important to seek a green and clean beneficiation method at this stage.Based on the dissemination characteristics of gold in the ore,the experimental study of Nelson gravity separation-flotation combined process was carried out.The results show that under the conditions of grinding fineness of 87%passing-0.043 mm,gravity multiple of 80 G and fluidization water volume of 3 L/min,the gravity gold concentrate with gold grade of 35.44 g/t and gold recovery of 55.85%and the gravity tailings with gold grade of 1.34 g/t can be obtained by Nielsen gravity separation.The closed-circuit flotation process of two roughing,two cleaning and two scavenging,and middle ore return in sequence can obtain the flotation gold concentrate with gold grade of 13.80 g/t and gold recovery of 31.38%.In summary,the total recovery rate of gold is 87.24%,the gold grade is 22.69 g/t,and the gold grade of tailings is 0.42 g/t after the combined process of Nelson gravity and flotation.The research results have important reference value for the non-cyanide gold separation process.
作者
吕艳蕾
刘杰
吕良
王勋
葛文成
任慧
LÜYanlei;LIU Jie;LÜLiang;WANG Xun;GE Wencheng;REN Hui(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China)
出处
《金属矿山》
CAS
北大核心
2022年第12期108-114,共7页
Metal Mine
关键词
金矿
尼尔森重—浮联合工艺
无氰选金工艺
gold mine
Nelson gravity-flotation separation
cyanide free gold separation process
