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

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2次精选可获得含WO369.20%,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WO359.00%,回收率79.60%的白钨精矿.

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 59.00%and recovery of 79.60%is achieved with five regular cleaners.