Wang Mengtao, Wei Haobin, Jin Saizhen, Zhang Guofan
Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China.
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
Molecules. 2024 Aug 20;29(16):3921. doi: 10.3390/molecules29163921.
The low-grade zinc oxide ore was sulfidized to increase the efficiency of flotation, but the effect of pre-sulfidization on the adsorption mechanism of octadecyl amine (ODA) on the smithsonite surface is currently unclear. In this study, the effect of pre-sulfidization on the adsorption mechanism of ODA and the flotation behavior was studied using smithsonite and pre-sulfidized smithsonite as the samples by zeta potential, contact angle measurement, total organic carbon analyzer (TOC), quartz microcrystalline balance (QCM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and micro-flotation tests. Micro-flotation tests showed that the pretreatment of sulfidization could improve the floatability of smithsonite. Zeta potential and contact angle measurements demonstrated that pre-sulfidization could favor the adsorption of ODA, which is further confirmed by the adsorption tests of ODA using TOC and QCM. Furthermore, FTIR and XPS analysis showed that pre-sulfidization changes the adsorption mode of ODA, changing it from physical adsorption to chemical adsorption. These results suggested that the favorable effect of pre-sulfidization on the adsorption of ODA and the flotation of smithsonite might provide important guidance for industrial application.
低品位氧化锌矿经硫化处理以提高浮选效率,但目前预硫化对十八烷基胺(ODA)在菱锌矿表面的吸附机理的影响尚不清楚。在本研究中,以菱锌矿和预硫化菱锌矿为样品,通过zeta电位、接触角测量、总有机碳分析仪(TOC)、石英微晶天平(QCM)、傅里叶变换红外光谱(FTIR)、X射线光电子能谱(XPS)和微浮选试验,研究了预硫化对ODA吸附机理和浮选行为的影响。微浮选试验表明,硫化预处理可以提高菱锌矿的可浮性。zeta电位和接触角测量表明,预硫化有利于ODA的吸附,TOC和QCM对ODA的吸附试验进一步证实了这一点。此外,FTIR和XPS分析表明,预硫化改变了ODA的吸附方式,使其从物理吸附转变为化学吸附。这些结果表明,预硫化对ODA吸附和菱锌矿浮选的有利影响可能为工业应用提供重要指导。