Disposal of tailings and the mining industry perspective: a case study of the Cuiabá Mine

Márcio Mansur Gomes, J. Filho, J. Pinheiro, C. Crystal
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引用次数: 2

Abstract

One of the methods that has been studied for the disposal of tailings by the mining industry is dry stacking. Several studies have indicated that the use of filtered tailings is feasible under certain technical and operational conditions. The requirements for deposition, and characterisation of the tailings properties, must be obtained through a wide range of field and laboratory tests. These parameters are key to determining the behaviour of the material during the dewatering process, the optimum moisture content and the maximum density of the tailing cake, as well as the physical and environmental stability of the projected geotechnical structure. The operational aspects related to the handling of the material are also vital to determine the placement of the filtered tailings on the facility. In addition, the advantages with respect to water consumption, reduced and/or flexible stack footprints and geometries, seepage control requirements, closure/reclamation costs and public perception of risk can result in dry stacking being selected as an economically beneficial alternative, particularly if life-of-mine risks and costs are appropriately considered. As with any conventional tailings management approach, careful and diligent planning, engineering and operational controls, quality assurance/quality control (QA/QC), instrumentation and monitoring are required to manage risks and uncertainties. This paper presents the criteria that need to be evaluated in the evaluation of filtered tailings as a business case, based on the experience of the authors developing such projects within the minerals industry.
尾矿处理与矿业前景:以库亚布矿为例
干堆是目前矿业研究的尾矿处理方法之一。多项研究表明,在一定的技术和操作条件下,使用过滤后的尾矿是可行的。必须通过广泛的现场和实验室测试来获得沉积要求和尾矿特性的特征。这些参数是决定物料在脱水过程中的行为、最佳含水率和尾矿饼的最大密度,以及预计岩土结构的物理和环境稳定性的关键。与物料处理有关的操作方面对于确定在设施上放置过滤后的尾矿也至关重要。此外,在水消耗、减少和/或灵活的堆垛面积和几何形状、防渗要求、关闭/复垦成本和公众对风险的认知等方面的优势,可以导致选择干式堆垛作为经济上有利的替代方案,特别是在适当考虑到矿井生命周期的风险和成本的情况下。与任何传统的尾矿管理方法一样,需要仔细和勤奋的规划、工程和操作控制、质量保证/质量控制(QA/QC)、仪器和监测来管理风险和不确定性。本文根据作者在矿产工业中开发此类项目的经验,提出了作为商业案例进行筛选尾矿评价时需要评估的标准。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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