银含量对方铅矿浮选的影响及其机理研究进展

为了阐明银含量对方铅矿浮选的影响，提高含银方铅矿中伴生银的综合回收效率，通过全面梳理前人研究成果，对含银方铅矿的资源状况、工艺流程和药剂制度进行了总结。首先，从不同维度和层面（从试验到模拟、从宏观到微观）综述了银含量对方铅矿的影响，其中包括银含量对方铅矿浮选行为及表面接触角的影响。然后，评述了前人利用红外光谱、微热动力学、电化学和量子化学等分析方法开展的有关银含量对方铅矿浮选行为影响机理的研究进展，上述分析方法相互验证，均证实银矿物对方铅矿的浮选有促进作用，且银含量与促进程度呈正相关。最后，针对含银方铅矿今后研究方向和银铅锌矿资源开发，提出科学、合理的建议，如：在现场生产中应尽量避免使用石灰调浆，如必须使用时，应控制好石灰用量，从而减少伴生银的损失。

Effect of Silver Content on Galena Flotation and Research Progress on Its Mechanism

The resources of silver-bearing galena in China are large，but the comprehensive recovery of silver is lower. Mostly mining enterprises and scientific research institutes have conducted studies tending to optimization of technological process and reagent regulation. Although they have made a great deal of achievements，they could not dissolve completely the radical issues that the recovery of silver is low. Meanwhile，the effect of silver content on flotation performance of galena is less explored，which leads to be difficult for the concentrator to significantly improve silver recovery index，resulting in incomplete of resources utiliazation and resources waste.For this reason，this paper summarized the work done by predecessors in detail，such as the resource status of silver-bearing galena，the current flotation process of silver-bearing galena and the reagent system. At the same time，the effects of silver content on the flotation behavior of galena were summarized，such as the increase of the surface area of synthetic silver-bearing galena，the change of Zeta potential in the slurry during flotation process，the different adsorption amount of collector on the surface of galena，and the transformation of electrochemical characteristic peak，etc.. The mechanism of the effect of the silver content on the flotation behavior of galena were analyzed in detail from experimental to simulation，macroscopic to microscopic aspects，respectively. At the last，in view of the shortcomings of the current resource characteristics，technological process，reagent system and research mechanism，some reasonable suggestions are also put forward for the development of silver-bearing lead-zinc ore resources，such as exploring the technical scheme or technological process with high efficiency and low cost，developing unifying reagent of cost，efficiency，environmental protection，non-toxic and harmless and so on.