Li Rui, Shao Yanhai, Li Jinhui, Liu Chenjie, Chen Hongqin, Meng Xiao, Jia Xinru
Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Molecules. 2024 Dec 20;29(24):6014. doi: 10.3390/molecules29246014.
The increasing demand for zinc resources and the declining availability of sulfide zinc ore reserves have made the efficient utilization of zinc oxide a topic of considerable interest. In this study, a ternary composite collector ABN (Al-BHA-NaOL system) was applied to the direct flotation of smithsonite. Micro-flotation studies showed that at pH 9, ABN exhibited better adsorption on smithsonite, achieving a recovery rate of 80.62%. Visual MINTEQ 3.1 and zeta potential analysis confirmed that ABN predominantly reacted with Zn(OH)(aq) on the surface of smithsonite. Furthermore, X-ray photoelectron spectroscopy (XPS) analysis results elucidated the formation of Al-O bonds through chemical adsorption on the smithsonite surface. Additionally, powder contact angle measurements indicated that ABN enhances the surface contact angle of smithsonite. These results illuminate that ABN is adsorbed by reacting with O sites on hydroxylated metal ions on the smithsonite surface, with Al serving as the adsorption center, thereby achieving separation and purification. Due to ABN's adsorption characteristics, smithsonite can achieve efficient and clean direct flotation recovery without sulfidization.
对锌资源需求的不断增加以及硫化锌矿储量的日益减少，使得氧化锌的高效利用成为一个备受关注的话题。在本研究中，一种三元复合捕收剂ABN（Al - BHA - NaOL体系）被应用于菱锌矿的直接浮选。微浮选研究表明，在pH值为9时，ABN在菱锌矿上表现出更好的吸附性能，回收率达到80.62%。Visual MINTEQ 3.1和zeta电位分析证实，ABN主要与菱锌矿表面的Zn(OH)(aq)发生反应。此外，X射线光电子能谱（XPS）分析结果表明，通过化学吸附在菱锌矿表面形成了Al - O键。另外，粉末接触角测量表明ABN增大了菱锌矿的表面接触角。这些结果表明，ABN通过与菱锌矿表面羟基化金属离子上的O位点反应而被吸附，Al作为吸附中心，从而实现分离和提纯。由于ABN的吸附特性，菱锌矿无需硫化即可实现高效、清洁的直接浮选回收。
