Reaction behaviors of Pb and Zn sulfates during reduction roasting of Zn leaching residue and flotation of artificial sulfide minerals
来源期刊：International Journal of Minerals Metallurgy and Materials2021年第3期
论文作者：Yong-xing Zheng Jilai Ning Wei Liu Pan-jin Hu Jin-fang Lü Jie Pang
摘 要：To evaluate the feasibility of recovering Pb and Zn sulfides and Ag-containing minerals from Zn leaching residue by the process of reduction roasting followed by flotation, the reaction behaviors of Pb and Zn sulfates during this process were investigated. Chemical analysis showed that the transformation ratios of PbSO4 and ZnSO4 could reach 65.51% and 52.12%, respectively, after reduction roasting, and the introduction of a sulfidation agent could improve the transformation ratios of these sulfates. scanning electron microscopy–energy dispersive spectroscopy（SEM–EDS） revealed that temperature obviously affects the particle size, crystal growth, and morphology of the artificial Pb and Zn sulfide minerals. Particle size analysis demonstrated that the particle size of the materials increases after roasting. Flotation tests revealed that a flotation concentrate composed of 12.01 wt% Pb, 27.78 wt% Zn, and 6.975 × 10-2 wt% Ag with recoveries of 60.54%, 29.24%, and57.64%, respectively, could be obtained after roasting.
Yong-xing Zheng1，Jilai Ning1，Wei Liu2，Pan-jin Hu1，Jin-fang Lü3，Jie Pang3
1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology2. School of Minerals Processing and Bioengineering, Central South University3. Faculty of Land Resource Engineering, Kunming University of Science and Technology
摘 要：To evaluate the feasibility of recovering Pb and Zn sulfides and Ag-containing minerals from Zn leaching residue by the process of reduction roasting followed by flotation, the reaction behaviors of Pb and Zn sulfates during this process were investigated. Chemical analysis showed that the transformation ratios of PbSO4 and ZnSO4 could reach 65.51% and 52.12%, respectively, after reduction roasting, and the introduction of a sulfidation agent could improve the transformation ratios of these sulfates. scanning electron microscopy–energy dispersive spectroscopy（SEM–EDS） revealed that temperature obviously affects the particle size, crystal growth, and morphology of the artificial Pb and Zn sulfide minerals. Particle size analysis demonstrated that the particle size of the materials increases after roasting. Flotation tests revealed that a flotation concentrate composed of 12.01 wt% Pb, 27.78 wt% Zn, and 6.975 × 10-2 wt% Ag with recoveries of 60.54%, 29.24%, and57.64%, respectively, could be obtained after roasting.
关键词：
