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.

在交通电气化和风力涡轮机中使用的这些战略金属的加工过程中，将稀土元素 (REE) 相互分离是一个成本高昂但必不可少的步骤。该项目将研究一种新颖的预分离工艺，该工艺能够通过第一组稀土氧化物的选择性碳酸化，然后对这些碳酸盐进行稀盐酸浸出，将稀土元素分成两组。该预分离步骤有可能减少通过传统溶剂萃取 (SX) 进行的后续 REE 分离步骤的数量、成本和环境影响。该项目将在实验室研究选择性碳酸化和浸出 (SCL) 工艺规模建立最佳预分离条件并在实际稀土矿石上验证该过程。研究人员在之前的项目中开发的 SX 模拟软件将用于量化整合 SCL 工艺对 REE 分离的资本和运营成本以及废水产生和能源需求的影响，这两者都是预计会减少。还将研究 SCL 工艺的基本方面，及其对其他关键和战略金属分离的适用性。通过将 REE 分离的运营和资本成本降低 25-50%，该项目将成为一个重要的里程碑，使加拿大能够站稳脚跟希望提取和加工稀土元素的国家之一。合作伙伴 Commerce Resources Corp. 和 SGS Canada 将受益于湿法冶金和稀土领域知识产权的发展以及高素质人才的培训。