This paper introduces an efficient extraction method based on organic and sulfuric complex acid system, to achieve the clean recovery of scattered metals from zinc leaching residue. The tartaric (TAR) and sulfuric complex acid significantly improved the leaching of Ge but had little effect on the leaching efficiency of Ga. A maximum extraction efficiency of 93.1% of Ge and 84.3% of Ga, was obtained at a sulfuric acid concentration of 100 g/L, TAR concentration of 20 g/L, leaching time of 1 h, and temperature of 80 °C, with a liquid-solid ratio of 10 mL/g, and a mixing rate of 250 rpm. The leaching process and mechanism were investigated by XRD, SEM, EPMA and UV–Vis. The findings showed that TAR acid plays a key role in the dissociation of the mineral phase containing Ge, as well as the promotion of Ge dissolution. Compared with the conventional sulfuric acid system, the TAR containing complex acid could effectively promote the decomposition of some iron ore phases, like beaverite, in which Ge tends to be embedded and enriched, in association with Fe. Additionally, the improved leaching efficiency of Ge was attributed to the formation of soluble TAR-Ge complexes, which were confirmed by UV–Vis.

本文介绍了一种基于有机和硫酸复合酸体系的高效萃取方法，以实现锌浸出残渣中残渣中金属的干净回收。酒石酸（TAR）和硫酸复合酸可显着改善Ge的浸出，但对Ga的浸出效率影响很小。在100的硫酸浓度下，最大萃取效率为Ge的93.1％和Ga的84.3％。 g / L，TAR浓度为20 g / L，浸出时间为1 h，温度为80°C，液固比为10 mL / g，混合速率为250 rpm。通过XRD，SEM，EPMA和UV-Vis对浸出过程和机理进行了研究。研究结果表明，TAR酸在含Ge矿物相的离解以及促进Ge溶解中起关键作用。与常规硫酸系统相比，含TAR的复合酸可以有效地促进某些铁矿相的分解，例如海狸石，其中Ge往往与Fe结合并富集。另外，Ge的提高的浸提效率归因于可溶性TAR-Ge络合物的形成，这已被UV-Vis证实。