Abstract: The heap leaching of zinc oxide ore with the zinc concentration range of 5%~15% is technically feasible. The zinc leaching rate is >93% in 13 weeks when zinc oxide is firstly cured with concentrated sulfurous acid in the heap leaching, the heap is set up with natural granules, heap height is 1 m, solution spraying is intermittent (1/3 time is idle), solution spraying intensity is 10~12 L/(m2×h), heap leaching temperature is 20~32℃, leaching solution is kept at pH=1.0~1.5, and the zinc concentration in low-grade zinc oxide ore is 11.49%. The contamination of slag from heap leaching of zinc oxide ore can be eliminated by method of liming of leaching slag.

Key words: low-grade zinc oxide ore, curing with sulfur acid, heap leaching, zinc leaching rate

摘要： 对含锌11.49%的低品位氧化锌矿以自然粒度筑堆，堆高1 m，浓酸熟化、板结后，采用间歇式喷淋(1/3闲置)，喷淋强度10~12 L/(m2×h)，堆浸温度20~32℃，堆浸浸出液终点pH值控制在1.0~1.5，经过13周的堆浸后，2 t规模低品位氧化锌矿的锌堆浸浸出率大于93%. 堆浸渣石灰乳处理以消除其可能的环境污染. 低品位氧化锌矿堆浸浸出工艺在技术上是可行的.

关键词: 低品位氧化锌, 浓酸熟化, 堆浸, 锌浸出率