The Pyrrhotite Problem

磁黄铁矿问题

• 批准号: RGPIN-2019-05419
• 负责人: Waters, Kristian
• 金额: $ 2.04万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 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=715538
• 关键词: Pyrrhotite; Problem

Canada is one of the most important mining nations in the world, producing more than 60 minerals and metals. Mining and mineral processing has long been one of the country's key wealth generators. In 2014 the sector employed approximately 375,000 people and contributed $57 billion to Canada's Gross Domestic Product (GDP), and accounted for 18.2% of the value of Canadian goods exports. With flotation being the main separation technique employed in the mining sector, the results of this research will be vital to improved operations. In 2017, Canadian mines accounted for 2 % of the total global zinc production; for nickel, this was 10 % of global production. Minerals are a non-renewable resource, so the processes used to recover them must be as economical and environmentally friendly as possible. One of the major issues in Canadian mineral deposits is the mineral pyrrhotite. Pyrrhotite is the second most common iron sulphide mineral in nature after pyrite, and presents a two-fold problem: It commonly reports to the concentrate as an unwanted diluent, reducing the grade and value of the product stream Due to its chemical nature, it has a strong tendency to undergo an exothermic reaction due in part to galvanic interactions undergoing a process that is termed self-heating'. Both of these issues cause significant problems in the processing of ore bodies that contain a high concentration of pyrrhotite. This research program will: Enhance our understanding of the surface properties of pyrrhotite to be able to better reject this mineral in processes such as flotation using environmentally friendly reagents Evaluate why pyrrhotite undergoes self-heating and provide methods of mitigation which do not harm the environment or are detrimental to downstream processing

加拿大是世界上最重要的矿业国家之一，生产 60 多种矿物和金属。 采矿和矿物加工长期以来一直是该国主要的财富创造者之一。 2014年，该行业雇用了约375,000人，为加拿大国内生产总值（GDP）贡献了570亿加元，占加拿大商品出口值的18.2%。 由于浮选是采矿业采用的主要分离技术，这项研究的结果对于改善运营至关重要。 2017年，加拿大矿山占全球锌产量的2%；对于镍来说，这占全球产量的 10%。 矿物是一种不可再生资源，因此用于回收矿物的工艺必须尽可能经济且环保。 加拿大矿藏的主要问题之一是磁黄铁矿矿物。 磁黄铁矿是自然界中仅次于黄铁矿的第二常见硫化铁矿物，存在双重问题： 它通常作为不需要的稀释剂报告给浓缩物，从而降低产品流的等级和价值 由于其化学性质，它很容易发生放热反应，部分原因是电偶相互作用经历了一个称为“自加热”的过程。 这两个问题都会在含有高浓度磁黄铁矿的矿体加工中造成严重问题。 该研究计划将： 增强我们对磁黄铁矿表面特性的了解，以便能够在使用环保试剂的浮选等工艺中更好地剔除这种矿物 评估磁黄铁矿为何会自热，并提供不损害环境或不利于下游加工的缓解方法