Mineral processing: flotation, physical separations, environmental

选矿：浮选、物理分离、环境

• 批准号: 445682-2012
• 负责人: Waters, Kristian
• 金额: $ 13.79万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=575066
• 关键词: Mineral; processing; flotation; physical; separations

Society has always needed mineral resources, both as commodities themselves, such as talc, and as sources of metals such as nickel. The extraction of minerals involves size reduction of mined rock (ore) and separation of minerals, together known as 'mineral processing'. Given Canada's abundant natural resources, mineral processing is practiced on a huge scale, billions of tons of ore annually, and thus process improvements can realize large benefits, economic and environmental. The importance to Canada is recognized in the series of industry-sponsored grants starting in 1991 of which this is the latest. There are seven companies supporting this grant directed at improvements in aspects of mineral processing: flotation, physical separations and environmental. Flotation is a mineral separation process that relies on creating large numbers (swarms) of small bubbles (ca. 1 mm) to collect ('float') selected mineral particles suspended in water. Swarm properties are controlled by chemicals, deliberately added in the case of frothers or naturally occurring, as in processing oil sands. The action of these chemicals, still not understood which hampers their effective use, is a focus of this grant. Our sustained emphasis on bubble swarm properties has realized important benefits and the current studies hold additional promise. Physical separations refer to processes that exploit mineral properties such as magnetism and density. A new tool to track particles in real time in separation devices is revealing insights that will lead to enhanced performance. The group is the only one in Canada with this technology. Trying to reduce water usage dry physical separations are emphasized. Last, but never least, the environment topics cover metal recovery from dilute effluents, and safe transport of sulphide mineral products which can spontaneously heat. The group has unique facilities for the study of spontaneous heating which are routinely accessed by the sponsors.

社会一直需要矿产资源，无论是作为商品本身，如滑石，还是作为金属的来源，如镍。矿物的提取包括将开采的岩石（矿石）缩小尺寸和分离矿物，统称为“矿物加工”。鉴于加拿大丰富的自然资源，矿物加工规模巨大，每年数十亿吨矿石，因此工艺改进可以实现巨大的经济和环境效益。从1991年开始的一系列行业赞助的赠款中认识到对加拿大的重要性，这是最新的一次。有七家公司支持这项赠款，旨在改善矿物加工的各个方面：浮选、物理分离和环境。