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Behaviour of Metals during Bioheap Leaching at the Talvivaara Mine, Finland

机译：芬兰Talvivaara矿的生物堆浸过程中金属的行为

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: The behaviour of base metals Ni, Zn, Cu, Co, Fe, and Mn, potentially toxic metals Pb, Cr, and Cd, and the radioactive elements, U and Th, in the Talvivaara mining process, Finland has been studied by tracing metal concentrations from the black schist ore, through ores subjected to bioheap leaching of varying duration, to pregnant leach solution (PLS), and solid process waste material deposited on site in gypsum waste ponds. It is apparent that Zn, Cu, Co, and Cd are leached from the ore in a similar manner and recovered efficiently in the PLS; however, Ni, though leached, was also found in the gypsum pond at relatively high concentrations. Relatively little Pb is released from the ore, but the small fraction that is mobilised accumulates in the gypsum pond. Of the radioactive constituents, Th is essentially immobile, whereas U is readily leached from the ore, again accumulating in gypsum pond waste. In addition, a laboratory-based sequential leach test was applied to assess the future leaching potential of metals from residual ore and process waste material under different environmental conditions.
机译：：通过追踪研究了芬兰Talvivaara采矿过程中贱金属Ni，Zn，Cu，Co，Fe和Mn，潜在有毒金属Pb，Cr和Cd以及放射性元素U和Th的行为从黑色片岩矿石，经过不同持续时间的生物堆浸的矿石，富集的浸出液（PLS）和现场沉积在石膏废料池中的固体过程废料中的金属浓度。显然，Zn，Cu，Co和Cd以类似的方式从矿石中浸出并在PLS中有效地回收。然而，尽管镍被浸出，但在石膏池中也发现了相对较高的浓度。从矿石中释放出的铅相对较少，但动员的少量Pb聚集在石膏池中。在放射性成分中，Th基本上是不可移动的，而U则很容易从矿石中浸出，再次堆积在石膏池废物中。此外，基于实验室的连续浸出试验被用于评估在不同环境条件下残留矿石和加工废料中金属的未来浸出潜力。

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