某氰化尾渣中铅、锌和铜的综合回收研究

Study on Comprehensive Recovery of Lead, Zinc and Copper from Cyanide Tailings

摘要: 对含有铅、锌和铜等有价金属的某氰化尾渣，采用预处理—铅锌混合浮选—预处理—铜浮选工艺，开展了详细的综合回收利用研究。研究结果表明，采用H₂SO₄活化预处理，在pH 8、丁基黄药用量为100 g/t时可获得Pb品位为10.87%、回收率为71.76%，Zn品位为31.89%、回收率为92.46%的铅锌混合精矿；采用现场选硫循环水对铅锌混合浮选尾矿进行洗涤，在pH 6、丁基黄药用量为50 g/t时得到了Cu品位为13.41%、回收率为33.39%的铜精矿。该工艺显现出了良好的经济效益和社会效益。

Abstract: Cyanide tailings containing valuable metals such as Pb, Zn and Cu were subjected to a detailed comprehensive recovery study using the process of pretreatment-Pb-Zn bulk flotation and pretreatment-Cu flotation. The results of the tests showed that the Pb/Zn bulk concentrate with a grade of 10.87% and a recovery of 71.76% for Pb, 31.89% and 92.46% for Zn could be obtained at pH 8 and 100 g/t of butyl xanthate by using H₂SO₄ activated pretreatment. Cu concentrate with a grade of 13.41% and a recovery of 33.39% was obtained at pH 6 and butyl xanthate of 50 g/t. The technology has shown good economic and social benefits.