Prevention and intervention strategies for the mitigation of fugitive dust emission from mining residues storage sites

矿渣贮存场扬尘减排防治策略

• 批准号: 543388-2019
• 负责人: Ayotte, Patrick
• 金额: $ 6.01万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=699591
• 关键词: Prevention; intervention; strategies; mitigation; fugitive

The prediction, control and mitigation of fugitive dust emissions from mine tailing requires important resources and entails significant management costs. In boreal contexts, these issues become acute during Winter conditions where mineral dust scatters over the snowpack in neighboring urban communities. In this collaborative project with the Centre de Recherche et Développement Arvida (CRDA), Usine Vaudreuil and the Site de Disposition des Résidus de Bauxite (SDRB) of Rio Tinto - Aluminium (RTA), we build on preliminary exploratory investigations and prior development of appropriate tools and protocols for laboratory and field studies of the spectroscopic and remote sensing determination of humidity levels and drying kinetics of bauxite residues. Following a survey of historical records of the meteorological conditions that led to fugitive dust emissions, along with modeling of wind speed distributions and erosion rates spatial profiles obtained from LIDAR altimetry data of the disposal site topography, a network of autonomous sensors will be deployed at strategic locations of the SDRB. Web-based management tools and detailed risk assessment protocols will be elaborated based on laboratory and field investigations of the drying rates as a function of the most critical environmental parameters, along with their continuous in situ monitoring. Finally, liquid dust suppressant applications will be automated with, for ultimate objective, the total control of dust emissions from the SDRB. Improved dust suppression strategies will be developed and tailored to support mitigation efforts at RTA Vaudreuil plant thereby reducing the environmental impact and costs of bauxite residues management, improving social acceptance in a concerted effort to impact positively mining industries' right to operate. The deliverables of this project will also permit straightforward extensions to a broad array of industrial activities facing fugitive dust emissions challenges.

预测、控制和缓解矿山尾矿的扬尘排放需要重要的资源，并带来巨大的管理成本。在北方环境中，这些问题在冬季条件下变得严重，矿物粉尘散布在邻近城市社区的积雪上。在这个与Centre de Recherche et Décampement Arvida（CRDA）、Usine Vaudreuil和Rio Tinto - Aluminium（RTA）的Site de Disposition des Résidus de Besides（SDRB）的合作项目中，我们建立在初步探索性调查和之前开发的适当工具和协议的基础上，用于实验室和现场研究，对铝土矿残渣的湿度水平和干燥动力学进行光谱和遥感测定。在对导致扬尘排放的气象条件的历史记录进行调查之后，沿着对从处置场地形的激光雷达测高数据中获得的风速分布和侵蚀率空间剖面进行建模，将在SDRB的战略位置部署一个自主传感器网络。将根据实验室和实地对干燥速度作为最关键的环境参数的函数进行的调查，以及沿着对它们的连续现场监测，详细制定基于网络的管理工具和详细的风险评估协议。最后，液体抑尘剂的应用将实现自动化，最终目标是全面控制SDRB的粉尘排放。将制定和定制改进的降尘策略，以支持RTA Vaudreuil工厂的减排工作，从而减少铝土矿残渣管理的环境影响和成本，提高社会接受度，共同努力积极影响采矿业的经营权。 该项目的交付成果还将允许直接扩展到面临扬尘排放挑战的广泛工业活动。