组合捕收剂浮选回收白钨矿选矿试验研究

Flotation recovery of scheelite with combined collector

  • 摘要: 江西某矽卡岩型白钨矿中钨矿物与萤石、方解石、石榴石等脉石矿物以各种产状紧密共生,嵌布粒度为以细粒为主的中-细粒不均匀嵌布,属难选白钨矿石.在对其矿石性质充分分析的基础上,重点采用731氧化石蜡皂、油酸钠及配制的组合捕收剂LGW进行对比试验,同时对工艺流程进行了加温与不加温常规精选的对比试验,结果表明,组合捕收剂LGW对该矿具有较强的选择捕收效果,经一粗二精二扫的闭路流程获得白钨粗精矿;粗精矿经过加温预处理后两次精选可获得含WO3 69.20 %,回收率78.30 %的白钨精矿,粗精矿通过磁场预处理及长时间强烈搅拌后经5次常温精选可获得含WO3 59.00 %,回收率79.60 %的白钨精矿.

     

    Abstract: The beneficiation experimental study is carried out according to the characteristics of a certain skarn type scheelite, in which the scheelite is finely and unevenly disseminated with the gangue minerals, such as fluorite, calcite and garnet, in the condition of granular,polyparticulate, star-dotted or impregnation. Based on analysis of the properties of the ore and the conditional experiments, three collectors are compared in the experiment including 731 oxidized paraffin soap,sodium oleate and combined collector LGW. As is shown in the results, combined collector LGW is better in collecting scheelite. Furthermore,comparative tests are conducted including heating concentration and normal cleaner,both using LGW. In heating concentration, scheelite concentrate with WO3 grade of 69.20% and recovery of 78.30% are obtained by treating rough concentrate obtained by closed-circuit consisting of one roughing, two concentrates and two scavengings. In normal cleaner, after pretreated by magnetic field and a long-time agitation, concentrate with WO3 grade of 59% and recovery of 79.60% is achieved with five regular cleaners.

     

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