近中性溶液条件下富镉铅锌矿矿石的风化淋滤实验研究

WEATHERING AND LEACHING EXPERIMENTS ONCd-RICH SPHALERITE ORE IN NEARLY NEUTRAL SOLUTIONS

在近中性溶液条件下对富镉锌矿石进行了风化淋滤实验研究,发现淋滤液中产生大量以石膏为主要成分的沉淀物。淋滤液呈碱性,淋滤出来的Zn、Cd以水溶态和沉淀态形式存在,而以后者为主。淋滤50天后,黄铁矿闪锌矿石中Zn、Cd的淋滤率为0.03%和0.01%,而半氧化闪锌矿石Zn、Cd的淋滤率则高得多,分别0.10%和0.60%。

Weathering and leaching experiments on Cd-rich sphalerite were done under the conditions of pH = 7.5 and room temperature. There was a great deal of gypsum-rich precipitation in leaching solutions. Furthermore, the leaching solution was alkaline, and Zn and Cd were leached out of zinc minerals present in aqueous solution and precipitation, but the latter was dominant. After 50 days of leaching, 0.03 % and 0.01% of Zn and Cd were leached out of pyrite-containing Zn-minerals while 0.10%and 0.60% of Zn and Cd,from oxidized Zn-minerals.