某高含泥含钨金氧化钼矿选矿试验研究

Study on processing for a tungsten-gold containing molybdenum oxide ore with high slime content

针对内蒙古某伴生钨、金型钼矿氧化率高、有用矿物嵌布粒度细、含泥量大的特点,采用硫化矿浮选—氧化钼钨矿浮选—钼钨浮选中矿再选的浮选流程,有效地解决了微细矿泥使浮选过程恶化的难题.对Mo含量为0.29%,WO3含量为0.063%及Au含量为0.56g/t的原矿,通过浮选可获得Mo和Au含量分别为16.26%和146.0g/t、回收率为11.55%和53.93%的硫精矿,以及Mo和WO3含量分别为5.07%和1.47%、回收率为64.64%和84.64%的氧化钼钨混合精矿.对氧化钼钨精矿(Au含量约为2.5g/t)中不计价的金进行氰化浸出,金的回收率在之前硫精矿的基础上又提高15.86%.相对原矿钼、钨、金的总回收率分别为76.19%,84.64%和69.79%,实现了该难选钼矿中钼、钨、金多金属的综合回收.

A refractory molybdenum ore containing tungsten-gold from inner mongolia is characterized by high oxidization rate,fine dissemination size of valuable minerals,large amounts of slimes.In order to recycle the valuable minerals,a flow-sheet of ＂sulfide minerals flotation-powellite flotation-individual retreatment of middling from powellite flotation＂was adopted.The issue of the deterioration of fine particle slime on flotation process was effectively solved.For crude ore containing Mo 0.29%,WO30.063%,Au 0.56g/t,by locked cycle tests,sulphur concentrate assaying Mo 16.26%,Au 146.0g/t with recovery Mo 11.55%,Au 53.93% can be obtained.Powellite concentrate containing Mo 5.07%,WO31.47% with recovery Mo 64.64%,WO384.64% can be achieved.Powellite concentrate（containing Au about 2.5g/t）with leaching recovery 15.86%is successful for head.The total recovery of Mo,WO3,Au for head is 76.19%,84.64%,69.79%,respectively.The comprehensive utilization of Mo,WO3,Au poly-metallic resources can be realized effectively.