Abstract
Pyrite flotation separation and encapsulation in tailings dams is proposed as a viable way to chemically stabilize tailings. Characterization of potential acid mine generation in tailings led to an innovative process in which acid-generating pyrite is separated by flotation from the coarse tailings and incorporated into the slime zone. This creates pyrite-free neutral tailings acceptable for placement in the dyke and permanently avoids acid generation.
Zusammenfassung
Die Abtrennung und Einkapselung von Pyrit Flotationsmitteln in Schlammteichen wird als praktikabler Weg zur chemischen Stabilisierung von Abgängen vorgeschlagen. Aus der Charakterisierung der potentiellen Säurebildung in Schlammteichen führte zu einem innovativen Verfahren, bei dem säurebildender Pyrit durch Flotation aus den groben Fraktionen der Abgänge abgetrennt und in die Schlammzone eingekapselt wird. Dadurch entstehen pyritfreie, neutrale Tailings, die für die Einbringung in den Schlammteich akzeptabel sind und die Säurebildung dauerhaft unterbinden.
Resumen
La separación por flotación y el encapsulación de la pirita en las presas de colas se propone como una forma viable de estabilización química de las colas. La caracterización del potencial de generación de drenaje ácido en los relaves condujo a un proceso innovador, en el que la pirita generadora de ácido se separa por flotación de los relaves gruesos, y se incorpora a la zona de limos. Esto crea relaves neutros sin pirita aceptables para su colocación en el dique y evita permanentemente la generación de ácido.
抽象
提出一种尾矿坝内黄铁矿浮选分离并封存的化学方式稳定尾矿的可行方法。在尾矿潜在产酸特征评价之后,提出了一种新型尾矿处理方法 ,即通过浮选将产酸的黄铁矿从粗尾矿中分离再混入污泥区封存。处理后的可接受尾矿不含黄铁矿,呈中性,可永久避免产酸。
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Acknowledgements
The authors thank Consulcont S.A.C. for their interest and access to their facilities and Dr. G. T. Lapidus (Universidad Autónoma Metropolitana-Iztapalapa, México) for review and enrichment of this article.
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Camero-Hermoza, P., Calla-Choque, D., Rojas-Montes, J.C. et al. Pyrite Flotation Separation and Encapsulation: A Synchronized Remediation System for Tailings Dams. Mine Water Environ 40, 74–82 (2021). https://doi.org/10.1007/s10230-021-00753-7
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DOI: https://doi.org/10.1007/s10230-021-00753-7