Extraction of rare earth elements (REEs) from fly ash and bottom ash of SaskPower's Poplar River thermal power plants

从 SaskPower 的 Poplar River 火力发电厂的飞灰和底灰中提取稀土元素 (REE)

基本信息

批准号：
522285-2017
负责人：
Alam, Shafiq
金额：
$ 1.82万
依托单位：
University of Saskatchewan
依托单位国家：
加拿大
项目类别：
Engage Grants Program
财政年份：
2017
资助国家：
加拿大
起止时间：
2017-01-01 至 2018-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=640570
关键词：
Extraction rare earth elements REEs

项目摘要

SaskPower is a provincial Crown Corporation and is the principal electricity supplier in Saskatchewan.SaskPower generates more than 3,214 megawatts (MW) of electricity from its facilities, which include threecoal-fired, seven hydroelectric, four natural gas-fired and two wind powered facilities. Among them, three coalfired thermal electric generating facilities are: 1) Boundary Dam Power Station at Estevan, 2) Poplar RiverPower Station near Coronach, and 3) Shand Power Station near Estevan. All those power plants use brown coalcalled lignite, which is burnt to make steam in the boiler that runs the generator to produce electricity.However, during firing of the coal, huge amounts of fly and bottom ash are produced. SaskPower stores thatashin lagoons. This ash contains valuable metals, especially rare earth elements (REEs), and REEs are widely usedin the high tech industries to produce smartphones, electric/hybrid cars, wind mill turbines, permanent magnets,missiles, etc. Since the existing lagoon capacities are running out, SaskPower is now looking to attract areseller of the fly ash being produced prior to impoundment in the lagoons. SaskPower has also planned theremoval and recycling of the impounded fly ash and produce a REEs concentrated ore body, which couldgenerate extra revenue for the company as a value added by-product of REEs. In the proposed research, asustainable process will be developed to recover valuable rare earth elements from the fly ash and bottom ashusing hydrometallurgical techniques.

SaskPower 是一家省级皇家公司，也是萨斯喀彻温省的主要电力供应商。SaskPower 的设施发电量超过 3,214 兆瓦 (MW)，其中包括三个燃煤设施、七个水力发电设施、四个天然气发电设施和两个风力发电设施。其中，三个燃煤火力发电设施是：1）埃斯特万边界坝电站，2）科罗纳赫附近的白杨河电站，3）埃斯特万附近的尚德电站。所有这些发电厂都使用称为褐煤的褐煤，在锅炉中燃烧产生蒸汽，运行发电机发电。然而，在煤炭燃烧过程中，会产生大量的飞灰和底灰。萨斯喀彻温省电力公司 (SaskPower) 将这些储存在泻湖中。这些灰烬含有有价值的金属，特别是稀土元素 (REE)，稀土元素广泛应用于高科技行业，用于生产智能手机、电动/混合动力汽车、风车涡轮机、永磁体、导弹等。由于现有的泻湖产能正在运行萨斯克电力公司现在正在寻求吸引在泻湖蓄水之前生产的粉煤灰的经销商。萨斯喀彻温省电力公司还计划清除和回收被扣押的粉煤灰，并生产稀土精矿体，这可以作为稀土附加值副产品为公司带来额外收入。在拟议的研究中，将开发可持续的工艺，利用湿法冶金技术从飞灰和底灰中回收有价值的稀土元素。