低-中温下富锗闪锌矿的氧压酸浸研究(英文)

Low-and Medium-temperature Pressure Oxidation Leaching of Germanium-rich Sphalerite Concentrate

通过正交试验对云南驰宏锌锗股份有限公司曲靖基地的富锗闪锌矿进行氧压酸浸研究。结果表明,在低温和中温下浸出动力学存在显著差异。在最佳试验条件(温度为150℃,氧分压为0.7MPa,浸出时间120min,物料粒度为58μm,搅拌速度为200r/min,酸锌比为1.4)下,锌和锗的浸出率分别为93.47%和89.84%。

The pressure oxidation leaching process of the germanium-rich sphalerite concentrate from Qujing-based Yunnan Chihong Zinc ＆ Germanium Co. , Ltd is investigated by orthogonal experiments. Experimental resuhs demonstrate that there exists substantially kinetic difference between the two temperature ranges. The optimal condition is determined that leaching temperature 150℃, oxygen partial pressure 0.7 MPa, leaching duration 120min, grain size 58 μm, stirring rate 200r/min, acid-to-zinc molar ratio 1.4. The dissolutions of zinc and germanium with optimal parameters are 93.47% and 89. 84% , respectively.