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Reaction behaviors of Pb and Zn sulfates during reduction roasting of Zn leaching residue and flotation of artificial sulfide minerals
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2021-01-08 , DOI: 10.1007/s12613-020-2029-9
Yong-xing Zheng , Jilai Ning , Wei Liu , Pan-jin Hu , Jin-fang Lü , Jie Pang

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 12.01wt% Pb, 27.78wt% Zn, and 6.975 × 10−2wt% Ag with recoveries of 60.54%, 29.24%, and 57.64%, respectively, could be obtained after roasting.



中文翻译:

锌浸出渣的还原焙烧和人工硫化矿物浮选过程中铅和硫酸锌的反应行为

为评估还原焙烧浮选法从锌浸出残渣中回收铅,锌硫化物和含银矿物的可行性,研究了铅和硫酸锌在此过程中的反应行为。化学分析表明PbSO 4和ZnSO 4的转化率还原焙烧后分别达到65.51%和52.12%,引入硫化剂可以提高这些硫酸盐的转化率。扫描电子显微镜-能量色散光谱法(SEM-EDS)显示,温度明显影响人造Pb和Zn硫化物矿物的粒径,晶体生长和形态。粒度分析表明,焙烧后材料的粒度增加。浮选试验表明,焙烧后可得到由12.01wt%Pb,27.78wt%Zn和6.975×10 -2 wt%Ag组成的浮选精矿,回收率分别为60.54%,29.24%和57.64%。

更新日期:2021-01-08
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