从湖南某铅锌尾砂中回收萤石的选矿试验

Beneficiation Experiment on Fluorite Recovery of Lead-Zinc Tailing from Hunan

湖南某铅锌矿尾砂Ca F2含量为18.58%,杂质成分主要为高梯度Si O2、Ca CO3等。为给从该尾砂中回收萤石提供依据,进行了选矿试验。结果表明:采用CDG100 mm×100 mm周期式脉动高梯度强磁选机预先除铁,非磁性产品以Na2CO3为调整剂、Na2S和水玻璃为抑制剂、酸化水玻璃(硫酸与水玻璃配比为2∶1)为精选抑制剂、Z-202为捕收剂,经1粗7精1扫闭路浮选,可获得Ca F2品位为94.76%、回收率为53.83%的萤石精矿。试验结果可以为含萤石类铅锌尾砂的综合利用提供参考。

There is 18. 58% Ca F2 in a lead-zinc mined tailings from Hunan,the main impurity composition is Si O2 and CaCO3. In order to provide the basis of the fluorite recovery and utilization of tailings,beneficiation experiment was conducted on the ore. The results indicated that,CDG100 mm × 100 mm cycle pulsating high intensity magnetic separator was used to remove iron,non magnetic products with Na2CO3 as regulator,Na2 S and sodium silicate as inhibitor,acidification sodium silicate（ ratio of sulphunic acid to sodium silicate is 2∶ 1） as depressor for cleaning,Z-202 as collector,by one roughing,seven cleaning,one scavenging closed circuit flotation test process,fluorite concentrate with Ca F2 grade of 94. 76%,recovery rate is 53. 83% was obtained.Test results can provide technical guidance for comprehensive utilization of lead-zinc mined tailings containing fluorite.