Concentrating Ge in zinc hydrometallurgical process with hot acid leaching-halotrichite method

Abstract

In recovering Ge and Ag from the calcine and fume dusts mixture of Huidong Lead-zinc Mine, the flow sheet of hot acid leaching-halotrichite method mainly consists of neutral leaching, low-acid leaching, high acid leaching and jarosite precipitation. In the ten circulation periods, the technology flow sheet was carried out smoothly. The loss of Ge in halotrichite residue is less than 5.0%, when iron is precipitated by using ferric potassium alum instead of common Na or ammonium alum and the conditions are controlled at temperature about 95 °C for more than 3 h, pH values below 1. 5. Ge and Ag are concentrated in the high acid leached residue, and their contents are 0.032% and 0.162%, respectively, and the total recovery and direct recovery of zinc are 98.94% and 96.15%, respectively.

Keywords

hot-acid leaching / halotrichite process / high-leached residue / Ge

References

[1] LiuZhong-qing, TangMo-tang, LuJun-le, et al.. Studies on the Ge behavior of neutral leaching process about smelting zinc through wet approaches[J]. Hydrometallurgy, 2000, 19(2): 43-46(in Chinese)

[2] HarbuckD D. Increasing germanium extraction from hydrometallurgical zinc residues[J]. Minerals & Metallurgical Processing, 1993, 10(1): 1-4

[3] TangShu-fang, ZhouChun-shan, JiangXin-yu, et al.. Extraction separation of germanium with hydroxamic acid HGS98[J]. Journal of Central South University of Technology, 2000, 7(1): 40-42

[4] JandovaJ, StefanovaT, MaixnerJ, et al.. Recovering germanium chloride from Czech brown coal [A]. Proceedings of the TMS Fall Extraction and Processing Conference[C], 1999, Spain, Minerals, Metals and Materials Society: 1355-1362

[5] ZhouLing-zhiRare-dispersed Metallurgy[M], 1988, Beijing, Metallurgy Industry Press(in Chinese)

[6] WuXu-liGe and its Metallurgy[M], 1988, Beijing, Metallurgy Industry Press(in Chinese)

[7] ShenHua-shengRare-dispersed Metallurgy [M], 1975, Shanghai, Shanghai People Press(in Chinese)

[8] LiuZhong-qing, TangMo-tang, FanQi-ming. Hot-acid leaching-Ge concentration about smelting zinc through Fe-jarosite approach[J]. Mine and Metallurgy Engineering, 2001, 21(1): 44-46(in Chinese)

[9] ChenJia-yong, YuShu-qiu, WuZhi-chunSeparation and Utilization of Fe in Wet Metallurgy[M], 1991, Beijing, Metallurgy Industry Press(in Chinese)

[10] DutrizacJ E. Effectiveness of jarosite species for precipitating sodium jarosite[J]. JOM, 1999, 51(12): 30-32

[11] SeyerS, ChenT T, DutrizacJ E J. Addressing iron disposal in the zinc industry[J]. JOM, 2001, 53(12): 32-35

[12] DutrizacJ E. The effect of seeding on the rate of precipitation of ammonium jarosite and sodium jarosite[J]. Hydrometallurgy, 1996, 42(2): 293-312