Surface chemistry of froth flotation of lead-zinc-arsenic-antimony ores

铅锌砷锑矿石泡沫浮选的表面化学

• 批准号: 556402-2020
• 负责人: Pawlik, MarekM
• 金额: $ 1.82万
• 依托单位: University of British Columbia
• 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=761485
• 关键词: Surface; chemistry; froth; flotation; lead

This collaborative research project will investigate mechanisms of recovery of unwanted minerals of arsenicand antimony during mineral separation from gold and base metal ores. These unwanted minerals pose seriousenvironmental and technological issues, and their concentrations in valuable mineral concentrates and intailings must be kept within allowed limits. Other undesirable phenomena affecting the efficiency of mineralseparation will also be investigated. The proposed research focuses on froth flotation technology, which is the most important method worldwidefor separation of finely ground mineral particles. Because of the principles of separation by froth flotation, theexperimental work in this research will involve detailed surface-chemical characterization of the minerals andores of interest. A range of advanced techniques and instrumentation will be employed to determine surfacecharge characteristics of the minerals, the chemical composition of their surfaces, chemical reactivity andsolubility in water, and ability to adsorb reagents. Interactions between fine particles of different minerals willalso be investigated to assess their dispersion or aggregation behavior depending on the chemistry of processwater (pH, presence of ions, red-ox potential, etc.). A portion of the experimental program will be dedicated toresearching the surface chemistry of very rare minerals of arsenic and antimony, e.g., the mineral boulangerite.These minerals are reported in increasing amounts in various mineral deposits in Canada and around the world,and understanding their physicochemical properties relevant to mineral processing is an essential scientificoutcome. It is expected that the fundamental results of this research will help with developing more efficient,environmentally friendly, separation processes to deal with the problematic minerals, which will lead toproduction of cleaner materials with minimum environmental impact. The results will have a direct influenceon the mineral processing industry in Canada and abroad.

该协作研究项目将调查在与黄金和碱金属矿石分离期间，在矿物质分离过程中恢复不良矿物质矿物质的机制。这些有害的矿物质构成了严重的环境和技术问题，并且必须将其集中在有价值的矿物质浓缩物和巨品中，必须保持在允许的范围之内。还将研究其他影响矿物分离效率的现象。 拟议的研究集中于泡沫浮选技术，这是全球最重要的方法，用于分离细矿物颗粒。由于泡沫浮选的分离原理，这项研究的实验性工作将涉及对感兴趣的矿物质的详细表面化学表征。将采用一系列先进的技术和仪器来确定矿物质的表面外观特征，其表面的化学成分，水中的化学反应性和溶解度以及吸附试剂的能力。研究不同矿物质的细颗粒之间的相互作用，以根据过程水的化学（pH，存在，红氧电位等）来评估其分散或聚集行为。实验计划的一部分将是专门的，以搜索非常罕见的砷和武器矿物质的表面化学，例如，矿物质boulangerite。据报道，这些矿物质的矿物质在加拿大和世界各地的各种矿物质中的量越来越多，并且与世界各地的物理化学特性相关，并且与他们的物理化学性质相关。 预计这项研究的基本结果将有助于开发更高效，更环保的分离过程，以应对有问题的矿物质，这将导致对具有最小环境影响的更清洁材料进行造成最大的生产。结果将直接影响加拿大和国外的矿产加工业。