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采矿国家之一，生产了60多种矿产和金属。 长期以来，采矿和矿产加工一直是该国主要的财富产生者之一。 2014年，该行业雇用了约37.5万名员工，并向加拿大国内生产总值（GDP）捐款570亿加元，占加拿大商品出口价值的18.2％。 由于浮选是采矿部门采用的主要分离技术，因此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总产量的2％；对于镍来说，这是全球产量的10％。 矿物质是一种不可再生的资源，因此用于恢复它们的过程必须尽可能经济和环保。 加拿大矿物质沉积物的主要问题之一是矿物黄铁矿。 黄铁矿本质上是第二个最常见的硫化铁矿物质，它是黄铁矿，并提出了两个问题： 它通常以不必要的稀释剂报告，以降低产品流的等级和价值 由于其化学性质，它具有强烈的趋势，即部分原因是经历了一种被称为自热的过程的电流相互作用。 这两个问题都会在含有高浓度的黄铁矿的矿体处理中引起重大问题。 该研究计划将： 增强我们对黄铁矿表面特性的理解，能够更好地拒绝使用环保试剂浮选等过程中的矿物 评估为什么黄铁矿会经历自加热并提供缓解方法，这些方法不会损害环境或不利于下游处理