高铁闪锌矿经二段加压浸出，锌浸出率97.09%，铁浸出率15.2%，元素硫产率93%，浸出液残酸3.95g/L，经简单中和、净化，生产合格硫酸锌新液供应锌电积。为了研究比较，闪锌矿经一段加压浸出，锌的浸出率98.09%，铁浸出率37.88%，元素硫产率96%，浸出液残酸高（46.4g/L），可并入现有传统湿法炼锌工艺流程处理。

High-iron sphalerite was subjected to two-stage pressure leaching. The leaching rate of zinc and iron was 97.09 % and 15.2 % respectively. The yield of elemental sulphur was 93 % . The residual acid in the leachate was 3.95 g/L. By easy neutralization and purification, zinc sulphate solution was obtained, which would be sent to the zinc electrowinning operation. For the purpose of comparison, one-stage pressure leaching on average sphalerite was conducted. Leaching rate of zinc and iron was 98.09 % and 37.88 % respectively, and the yield of elemental sulphur was 96 % . The leachate with higher acid content (46.4 g/L) could be integrated into the existing traditional hydrometallurgical process of zinc