Use of Advanced Customizable Leach Columns as a tool to characterize the physiochemical processes occurring in mine waste rock and tailings

使用先进的可定制浸出塔作为工具来表征矿山废石和尾矿中发生的物理化学过程

• 批准号: 576745-2022
• 负责人: Smith, LauraLA
• 金额: $ 4.81万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=749521
• 关键词: Use; Advanced; Customizable; Leach; Columns

Mining generates large amounts of waste (e.g. waste rock and tailings), some of which contains sulfide minerals that oxidize and produce acid rock drainage (ARD) when exposed to oxygen. Mine waste is commonly stored on-site in storage facilities which can account for > 80% of all ARD produced. Several methods exist to address ARD potential, but these tests are rarely linked to specific environmental conditions or repository designs. Advanced Customizable Leach Columns (ACLCs) can be used as a way to provide laboratory scale tests that replicate site specific conditions (e.g., temperature, oxygen availability, water content) can potentially offer a better prediction of ARD potential and inform design considerations for storage facilities. The goal of this research program is to increase our fundamental understanding of using lab-scale experiments to characterize and predict ARD production from mine waste by quantifying the role of different variables that control ARD production. Research outcomes are expected to immediately inform improved waste storage solutions on site by both NexGen and Imperial. The improvements, modifications, and discoveries will also be implemented in the new generation of ACLCs developed by Okane to offer to clients worldwide.

采矿会产生大量废物（例如废石和尾矿），其中一些含有硫化物矿物，当暴露于氧气时会氧化并产生酸性岩排水（ARD）。矿山废物通常储存在现场储存设施中，占所有 ARD 产量的 80% 以上。存在多种方法来解决 ARD 潜力，但这些测试很少与特定环境条件或储存库设计联系起来。先进的可定制浸出塔 (ACLC) 可用于提供实验室规模的测试，复制现场特定条件（例如温度、氧气可用性、水含量），可以更好地预测 ARD 潜力，并为储存设施的设计考虑提供信息。该研究计划的目标是通过量化控制 ARD 生产的不同变量的作用，加深我们对使用实验室规模实验来表征和预测矿山废物 ARD 产量的基本理解。 NexGen 和 Imperial 预计研究成果将立即为改进现场废物储存解决方案提供信息。这些改进、修改和发现也将应用在 Okane 开发的新一代 ACLC 中，为全球客户提供服务。