有色金属硫化矿资源复杂，伴生元素价值大，单一捕收剂难以获得理想指标，组合捕收剂具有互补性和协同作用效应，有利于实现复杂多金属硫化矿资源高效分离和综合回收。项目采用理论和测试相结合的方法，研究多元捕收剂在矿物表面的协同作用机制。采用密度泛函理论研究捕收剂分子吸附对硫化矿物表面原子反应活性和电子态密度的影响，查明矿物表面捕收剂吸附的诱导作用传递规律；研究不同烃基结构的捕收剂在固液界面空间排列结构，建立多元捕收剂在固液界面共吸附的分子组装模型。采用微量热研究组合捕收剂在矿物表面吸附的协同作用热效应和动力学常数，建立组合捕收剂协同作用热力学和动力学模型；采用红外光谱、光电子能谱等表面测试手段研究不同类型和结构的捕收剂共吸附对表面原子化学态的影响，建立多元捕收剂分子协同作用的表面化学模型。项目研究成果对于复杂难选多金属硫化矿的高效浮选组合捕收剂开发具有重要的理论意义和实践价值。

Non-ferrous metal sulfide orel resources are complex, and the value of associated elements is high. It is difficult to obtain ideal indexes by using a single collector. The multi-collectors have complementary and synergistic effects, which is conducive to the efficient separation and comprehensive recovery of complex polymetallic sulphide orel resources. The synergistic mechanism of multi-collectors interacting with mineral surfaces are studied by the combination of theory and tests in this project. Density functional theory is used to study the influence of collector molecular adsorption on reactivity and electronic density of states of surface atoms, and to ascertain the law of induction of collector adsorption on mineral surface. Density functional theory is used to study the spatial arrangement of collectors with different hydrocarbyl at the solid-liquid interface, and to establish a molecular assembly model of the multi-collectors co-adsorption at solid-liquid interface. Microcalorimetry is used to studied synergistic thermal effects and kinetic constants of the multi-collector adsorption on mineral surfaces, and to establish a synergistic thermodynamic and kinetic model of multi-collectors. Infrared spectroscopy, XPS and other surface testing apparatus are employed to study the effect of co-adsorption of collectors with different types on the surface atomic chemical state, and to establish a surface chemical model of multi-collectors synergy. This research results have important theoretical and practical values for the development of high efficiency combined collectors for effective separation of complex polymetallic sulphide resources.