寨上金矿焙烧过程中砷、汞的释放研究

Study on Release of Arsenic and Mercury During Baking for Zhaishang Gold Mine

本文主要对金矿开采中有毒有害元素的释放进行了探讨,明确了在金矿开采过程中主要的环境问题是氰化物堆浸和酸性矿坑排水问题。研究表明,在金矿焙烧加工过程中,As、Sb和Hg等元素会向大气中释放,并随风向和距离而变化;尾矿中As的含量为原矿的50%,达到4 000 mg/kg,但尾矿浸出液中As的浓度仅为90μg/L,这可能与这是新开矿山有关系。

The paper discussed release possibility of toxic and harmful elements during gold mining. It presented the major environmental problems that are cyanidation setups and Add Mine drainage（AMD） during gold mining. The results showed As, Sb and Fig may release to the air during the process of bake and the concentrations vary with the distance and wind direction. The amounts of As Sb and Hg in mine tailing accounts for 50% of ore, the concentration of arsenic is about 4 000 mg/kg. But the concentration of arsenic in the leachate of mine tailing is only 90μg/L, which may be related with this goldmine is exploted nearly.