In this study, a new flotation approach, a low-alkaline and non-desliming process, was introduced for improving lead and zinc recoveries, lowering production cost and reducing environmental pollution. Lab-scale experiments results show that the new process contributed to the flotation of the complex mixed sulfide-oxide lead and zinc ore regarding two aspects: (1) High alkaline process (pH = 12±) was replaced by low alkaline process (pH = 9±) by using collector WS (a mixture of ethyl thiocarbamate, ammonium dibutyldithiophosphate and dithiophosphate-25) and combined depressant Na₂S/ZnSO₄/Na₂SO₃ for lead sulfide flotation; (2) Non-desliming process was successfully achieved by using collector MA (a mixture of ether amine, hydroxyethyl cellulose and polyacrylic acid) and combined depressant SHP/SS (sodium hexametaphosphate/sodium silicate) for zinc oxide flotation. And 43.37% Pb in the Pb concentrate was recovered, the corresponding Pb grade was 52.73%, total 84.42% Zn was recovered by the flotation of zinc sulfide minerals and zinc oxide minerals. Moreover, the two aspects of the new approach were systematically verified from lab-scale to industrial-scale application. The industrial-scale flotation tests show that Pb recovery in Pb concentrate increased by 1.86% compared with that of original system during industrial-scale tests period, and the Pb recovery increased by 4.09% compared with that of original system before industrial-scale tests period, while the Zn operating recovery in zinc oxide concentrate improved by 19.52%. Moreover, the total reagent cost of the whole new process significantly declined by 3.93 yuan per ton of ore.

在这项研究中，引入了一种新的浮选方法，一种低碱和非脱泥工艺，以提高铅和锌的回收率，降低生产成本并减少环境污染。实验室规模的实验结果表明，新工艺对复杂混合硫化物-氧化物铅锌矿的浮选有两个方面的贡献：（1）高碱工艺（pH = 12±）被低碱工艺（pH = 9±) 通过使用捕收剂 WS（硫代氨基甲酸乙酯、二丁基二硫代磷酸铵和二硫代磷酸-25 的混合物）和组合抑制剂 Na ₂ S/ZnSO ₄ /Na ₂ SO ₃用于硫化铅浮选；(2)采用捕收剂MA（醚胺、羟乙基纤维素和聚丙烯酸的混合物）和复合抑制剂SHP/SS（六偏磷酸钠/硅酸钠）进行氧化锌浮选，成功实现了不脱泥工艺。并通过硫化锌矿物和氧化锌矿物的浮选，回收了铅精矿中43.37%的铅，相应的铅品位为52.73%，共回收了84.42%的锌。此外，从实验室规模到工业规模应用，系统验证了新方法的两个方面。工业规模浮选试验表明，在工业规模试验期间，铅精矿的铅回收率比原系统提高了1.86%，铅回收率提高了4。与工业规模试验期前原系统相比提高了09%，氧化锌精矿的锌运行回收率提高了19.52%。而且，整个新工艺的试剂总成本每吨矿石显着下降了3.93元。