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使用NMR进行复杂的采矿尾矿材料沉积和干燥过程的表征

SeyedHamed Derakhshandeh¹, Jussi Nousiainen², Markus Piekkari²

¹NMR Research Unit, University of Oulu, Oulu, Finland. vladimir.zhivonitko@oulu.fi.

Physical chemistry chemical physics : PCCP

|December 5, 2025

概括

便携式核磁共振 (NMR) 有效地监测金矿尾矿沉积和干燥. 这项技术量化了水含量和流动性,有助于废弃物储存设施管理和环境安全.

科学领域:

地质技术工程地质技术工程
环境科学环境科学
分析化学分析化学

背景情况:

沉和干燥是采矿操作中的关键物理化学过程.
废弃物储存设施 (TSF) 的有效管理对于环境安全和运营效率至关重要.
目前用于描述尾矿行为的方法在范围和实时适用性方面可能受到限制.

研究的目的:

开发和验证一种使用便携式单面核磁共振 (NMR) 来研究金矿尾矿沉积和干燥的方法.
调查尾矿物质和矿物质特性对这些过程的影响.
评估NMR在实时监测和优化TSF管理方面的潜力.

主要方法:

使用便携式单面H NMR仪器来检测尾矿中的水信号.
研究了自由和机械诱导的沉积过程.
使用受控空气加NMR测量信号幅度和T₂放松时间,评估干燥动态.

主要成果:

观测到短期和长期沉积的不同阶段,时间范围不同.
检测到机械诱导的沉积,这种现象在文献中很少报道.
在泥到泥的过渡过程中,量化水含量发生变化,将NMR信号与水流动性和尾矿特性 (颗粒大小,矿物学) 相关联.

结论:

便携式NMR是一种敏感的工具,用于描述尾矿沉积和脱水动态.
这项研究揭示了沉率,颗粒大小和矿物密度之间的复杂关系.
核磁共振为实时监测提供了有价值的分析方法,增强了TSF管理策略和环境安全.

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