Pré-séparation des éléments de terres rares par carbonatation et lixiviation sélective

稀有土地碳酸化和浸出选择的预分离

• 批准号: 576240-2022
• 负责人: Boulanger, JeanFrançoisJF
• 金额: $ 1.62万
• 依托单位: Université du Québec en Abitibi-Témiscamingue
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=757506
• 关键词: Pr; paration; des; ments; de

The separation of rare earths elements (REE) from one another is a costly but essential step in the processing of these strategic metals used in the electrification of transportation and in wind turbines. This project will study a novel pre-separation process able to split the REE in two groups through a selective carbonation of the rare earth oxides of the first group, followed by a dilute HCl leach of these carbonates. This pre-separation step has the potential to reduce the number, cost and environmental impact of the subsequent REE separation steps, to be conducted by conventional solvent extraction (SX).The project will study the selective carbonation and leach (SCL) process at laboratory scale to establish optimal pre-separation conditions and prove-up the process on actual REE ore. A SX simulation software, developed by the researchers during a previous project, will then be used to quantify the impact of integrating the SCL process on the capital and operating costs of REE separation, as well as its effluent production and energy demand, both of which are expected to decrease. Fundamental aspects of the SCL process will also be investigated, along with its applicability to other critical and strategic metals separations.By reducing the operating and capital costs of REE separation by 25-50%, the project will represent a significant milestone enabling Canada to stand out among the countries wishing to extract and process REE. The partners, Commerce Resources Corp. and SGS Canada will stand to benefit from this development of intellectual property and training of highly qualified personnel in the fields of hydrometallurgy and REE.

稀土元素（REE）彼此之间的分离是处理这些战略金属在运输和风力涡轮机电气化中使用的代价高昂但必不可少的一步。该项目将研究一个新的分离前过程，能够通过对第一组的稀土氧化物的选择性碳酸化将REE分成两组，然后是这些碳酸盐的稀释HCl浸出。这种分离前的步骤有可能减少随后的REE分离步骤的数量，成本和环境影响，该步骤将由常规溶剂提取（SX）进行。该项目将在实验室规模上研究选择性碳酸和LEACH（SCL）过程，以建立最佳的预分类条件，并在实际REE OEE上证明该过程。然后，由研究人员在上一个项目期间开发的SX模拟软件将用于量化SCL流程对REE分离的资本和运营成本的影响，以及其废水生产和能源需求，这两者都将减少。 SCL流程的基本方面也将进行研究，并适用于其他关键和战略金属分离。通过将REE分离的运营和资本成本降低25-50％，该项目将代表一个重要的里程碑，使加拿大能够在希望提取和处理REE的国家中脱颖而出。合作伙伴，Commerce Resources Corp.和SGS Canada将受益于这种知识产权的发展以及在Hydrometallurgy and REE领域对高素质人员的培训。