大厂矿区尾矿稀散资源分布规律与潜力评价研究

许多矿山开采和选矿排放的尾砂中蕴藏丰富的伴生金属资源,随着这类矿产资源价格上涨,尾砂伴生资源越来越受到人们的关注。本文对大厂矿集区茶山、车河、长坡和绿荫塘四个尾矿库中铟、镉、镓、锗等稀散元素分布特征与变化规律进行了调查,以期评价其潜在经济价值。调查结果表明,解放前修建的绿荫塘老尾矿库尾砂稀散元素铟、镉、锗均远超过工业品位,具有一定开采价值。70年代修建的长坡尾矿库铟、镉达到工业品位;90年代修建的车河、茶山尾砂库只有铟达到工业品位。四个尾矿库中稀散元素含量与尾砂来源和选矿水平密切相关,并发生次生淋滤富集作用。对环境有毒害的稀散元素镉尽管含量较高,但其主要赋存在闪锌矿中并没有释放到土壤环境中产生污染。这些调查研究结果将为政府部门和矿山企业决策提供依据。

Research on the distribution rule and evaluation of dispersed element resources in tailings storage of the Dachang mine, Guangxi

Abstract: Long-term stacked tailings, such as Liuyintang, Cashan, Changpo, and Chehe in the Dachang mine of Guangxi Province, contain abundant dispersed elements of mineral resources, which attract much attention due to the rising price of mineral resources. This paper investigates the reserves of dispersed elements in tailings storage and their distribution rule in the concentrated mineralization zone of Dachang, and suggests their potential huge values. It is found that the dispersed elements In, Cd and Ge reach the industrial grade, and possess certain economic values. The elements In and Ce in the Changpo old tailing which was constructed in the 1970s also reach industrial grade. Same are the element of In in the Chehe and Chashan tailings constructed in the 1990s. The concentrations of dispersed elements are closely related to the sources of tailings and the levels of mineral processing. Although the Dachang tailing is rich in cadmium, which adversely affects the environment, it mainly occurs in sphalerite ores, and does not release into the hypergene ecosystem. These results provide evidence for government departments and mining enterprises to make decisions.