苹果酸对含铊黄铁矿的淋滤实验研究

Malic acid leaching investigation on thallium-containing pyrite deposit

在 ２５～５５℃低温条件下研究了苹果酸对广东云浮含铊黄铁矿的准动态淋滤，模拟考察了Ｔｌ、Ｃｄ和 Ｐｂ三种有毒元素随矿山开采和环境介质等因素作用而进入环境的情况。结果表明，云浮矿中ＴＩ的含量大大超过地壳背景值，越细的粒级中含量越高。从淋滤结果可以推测，在矿山开采过程中，在环境介质的淋滤作用下，Ｔ１进入环境的速率远比Ｃｄ和Ｐｂ快。在介质浓度、作用时间和温度等影响淋滤结果诸因素中，温度的影响尤为明显。

The para-dynamic malic acid leaching of thallium-containing pyrite deposit in Yunfu, Guangdong Province, was performed at a temperature ranging from 25 to 55℃. The immigrating environment of three toxic elements, thallium, cadmium and lead, were investigated experimentally and simulatively. The results indicate that the content of thallium in Yunfu deposit exceeds the background value of the earth's crust seriously, and the finer the sample, the higher the content. From the leaching results of those three samples, it is inferred that thallium comes into environment more rapidly than Cd and Pb during the exploitation of the deposit and the reaction Of the deposit with acid media. Compared with acid medium concentration and reaction time, temperature is the most notable factor to the leaching results.