Investigation of the recovery of the rare earth materials from phosphogypsum by-product from phosphoric acid production processes

磷酸生产副产磷石膏回收稀土材料的研究

• 批准号: 484725-2015
• 负责人: Azimi, Gisele
• 金额: $ 1.71万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 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=584497
• 关键词: Investigation; recovery; rare; earth; materials

Rare earth elements (REEs) and their compounds are among the strategic materials that are extensively used in the production of many technologically advanced products, such as wind turbines, electric and hybrid cars, automative catalytic convertors, and hand-held electronic devices. The demand for REEs is projected to rise by ~40% by 2016. Because of their increasing global demand, finding new sources for these materials is highly of interest. One of the sources for these elements is the phosphate ore that is being used for the production of phosphoric acid in the fertilizer producing companies. After the phosphate rock is reacted with sulphuric acid to form phosphoric acid, a by-product, called phosphogypsum will be prodcued and it contains some amounts of REEs that come from the phosphate rock. Agrium Inc., is a fertilizer company, located in Alberta, Canada that has stacks of phosphogypsum as their by-product. In the current proposal, we propose to investigate the recovery of REEs from Agrium's phosphogypsum by a hydrometallurgical acid leaching process. The developed process will provide a new source for rare earth materials. Not Only will it provide a new route for processing an industrial waste stream to produce valuable materials, but also it will enable the conversion of this waste to gypsum product, which can be used as construction materials. The proposed project will benefit Canada; because it helps Canadian producer satisfy their demand for rare earth materials. The proposed research has a potential for commercialization, and we will look at the scaling-up possibilities and implementation by Agrium and other phosphoric acid production companies with phosphogypsum by-product.

稀土元素及其化合物是广泛用于生产许多技术先进产品的战略材料之一，如风力涡轮机、电动和混合动力汽车、汽车催化转化器和手持电子设备。预计到2016年，稀土需求将增长约40%。由于全球需求不断增长，为这些材料寻找新的来源是非常有意义的。这些元素的来源之一是用于化肥生产公司生产磷酸的磷酸矿石。磷矿石与硫酸反应生成磷酸后，会产生一种称为磷石膏的副产品，其中含有一定量的来自磷矿石的稀土元素。Agrium Inc.，是一家位于加拿大阿尔伯塔的化肥公司，其副产品是大量的磷石膏。在目前的建议中，我们建议调查 通过湿法冶金酸浸工艺从Agrium磷石膏中回收稀土。开发的工艺将为稀土材料提供新的来源。它不仅将为处理工业废物流以生产有价值的材料提供新的途径，而且还将使这种废物转化为可用作建筑材料的石膏产品。拟议的项目将有利于加拿大，因为它有助于加拿大生产商满足他们对稀土材料的需求。拟议的研究具有商业化的潜力，我们将研究Agrium和其他磷酸生产公司利用磷石膏副产品扩大规模的可能性和实施情况。