某复杂含泥白钨矿常温浮选试验研究

Experimental Research on Flotation of a Complex Mud-bearing Scheelite at Room Temperature

试样为某铜浮选尾矿经过毛毯机预富集后所得复杂含泥白钨矿样,WO_(3)含量仅为0.43%,矿物组成复杂、硫含量高,导致白钨回收困难。本试验研究旨在探索该试样中白钨常温浮选选矿工艺方案,针对试样矿石性质,开展了调整剂用量、捕收剂种类和用量、矿浆浓度等条件试验。试验结果表明,pH调整剂Na_(2)CO_(3)能够提高白钨品位和回收率,NaOH则无明显影响,抑制剂水玻璃能有效抑制脉石,新型脂肪酸钨捕收剂CZ-5获得的选矿指标优于其他捕收剂。在磨矿细度-74μm占85.26%,钨粗选Na_(2)CO_(3)用量3000 g/t、水玻璃用量1000 g/t、CZ-5用量200 g/t最佳条件下进行常温浮选,获得了WO_(3)品位为17.09%、回收率为59.50%的钨精矿。精选闭路试验得到WO_(3)品位为17.01%、回收率为66.00%的钨精矿。该试验研究结果可为同类型资源回收利用提供参考。

Taking a complex mud-bearing scheelite as a sample,it is obtained from some copper flotation tailing after preconcentration by a blanket machine.The WO_(3) content is only 0.43%,complex mineral composition,high sulfur content,resulting in difficult recovery of scheelite.The study is to explore the beneficiation process of white tungsten with normal temperature flotation in this specimen.According to properties of the specimen,the experiments,such as regulator dosage,collector type and dosage and pulp density are carried out.The results show that the pH regulator Na_(2)CO_(3) can improve the grade and recovery of scheelite,while NaOH has no obvious effect.The inhibitor water glass can effectively inhibit gangue.The inhibitor water glass effectively inhibits gangue,and the new fatty acid tungsten collector CZ-5 has better indicators than other collectors.The tungsten concentrate with WO_(3) grade of 17.09%and recovery of 59.50%was obtained by normal temperature flotation under the optimum conditions of grinding fineness of−74μm accounted for 85.26%,Na_(2)CO_(3) of 3000 g/t,water glass of 1000 g/t and CZ-5 of 200 g/t.The tungsten concentrate with WO_(3) grade of 17.01%and recovery rate of 66.00%was obtained through the closed-circuit test.The conclusion can provide reference for the recycling of the same type of resources.