闪锌矿精矿氧压酸浸渣中硫的回收实验研究

对锌精矿氧压酸浸渣中硫的回收进行了研究,选择不燃不爆的有机试剂A作萃硫剂,在加热条件下,浸渣中的硫溶解于有机试剂A中,冷却后析出单质硫。当液固比为8∶1,≥110℃加热6～8min,硫回收率达98.5%,纯度>99.5%。

氧压浸出炼锌渣处理工艺研究

文章以氧压浸出炼锌渣处理工艺为研究对象,首先简单介绍了氧压浸出炼锌技术,并分析了其具备的技术优势,随后讨论了氧压浸出渣处理及存在的问题,最后结合问题,提出了一些氧压浸出渣处理工艺技术,以供参考。

Leaching and recovery of zinc from leaching residue of zinc calcine based on membrane filter press

The feasibility of leaching and recovery of zinc from zinc leaching residue （ZLR） based on a membrane filter press （MFP） was investigated. Experimental results show that zinc calcines with particle sizes of less than 106 μm and chambers of widths of 30 mm are appropriate for establishing uniform filter cakes to obtain acceptable leaching and recovery results. The leaching of zinc from ZLR performed via washing at 90 to 96 ℃ for 90 min with spent electrolyte using a MFP results in a zinc extraction rate of 97%, and almost all of the zinc leached are recovered after water washing with MFP, thereby avoiding any loss in the ZLR. Compared with the traditional hot concentrated acid leaching process, the process based on MFP as a leaching reactor is able not only to ensure a high extraction rate but also to reduce the leaching time. Moreover, the thickening, pulping, second leaching, washing, filtering and pressing could be integrated and realized using a single MFP.