陕西某难选钼矿石选矿试验

摘要

陕西某难选钼矿石钼品位为0．099%，钼主要以辉钼矿形式存在。矿石辉钼矿嵌布粒度细，且与滑石等易浮层状硅酸盐矿物嵌布密切。为给该矿石开发利用提供依据，进行了三阶段磨矿—阶段浮选试验研究。结果表明：在一段磨矿细度为-0．074mm占70%、二段磨矿细度为-0．038 mm占84%、三段磨矿细度为-0．038 mm占95%条件下，以水玻璃+石灰+BK510为抑制剂、煤油+柴油为捕收剂、BK340为辅助捕收剂、2号油为起泡剂，进行浮选，获得了钼品位为47．56%、回收率为86．78%的钼精矿。试验结果可以为该矿石开发利用提供技术依据。%There is 0. 099% Mo in a refractory molybdenum ore from Shaanxi,molybdenum mainly exists in form of mo-lybdenite. Molybdenite was finely disseminated and closely disseminated with easily floating silicate minerals,talc,etc. To pro-vide technique basis for the development and utilization of the ore,three stage grinding-stage flotation test was conducted. Re-sults show that at first stage grinding fineness of 70% passing 0. 074 mm,second stage grinding fineness of 84% passing 0. 038 mm,third stage grinding fineness of 95% passing 0. 038 mm,using sodium silicate + lime + BK510 as depressor,kerosene +diesel as collector,BK340 as auxiliary collector,2# oil as frother,flotation process,molybdenum concentrate with molybdenum grade of 47. 56% and recovery of 86. 78% was obtained. The test results can provide technical basis for the development and utilization of the ore.