“…Mixed surfactants lead to better flotation performances, including increased recovery and enhanced selectivity to the target mineral (Rao and Forssberg., 1997;Wang et al, 2016Wang et al, , 2014Xu et al, 2017b., Xie et al, 2020aXie et al, 2020b;Shu et al,2020). Owing to the strong synergistic interactions between two surfactant molecules with oppositely charged head groups, a large number of mixed collectors may lead to low surface tension and lower critical micelle concentration(CMC) (Alexandrova et al, 2009;Rao and Forssberg., 1997;Wang et al, 2016Wang et al, , 2014Xu et al, 2017a. In the flotation process, different types of mixed cationic/anionic collectors are used for surface modification to adjust the wetting properties of feldspar particles.…”