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, Marek
• 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: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=706329
• 关键词: Surface; chemistry; froth; flotation; lead

This collaborative research project will investigate mechanisms of recovery of unwanted minerals of arsenic and antimony during mineral separation from gold and base metal ores. These unwanted minerals pose serious environmental and technological issues, and their concentrations in valuable mineral concentrates and in tailings must be kept within allowed limits. Other undesirable phenomena affecting the efficiency of mineral separation will also be investigated. The proposed research focuses on froth flotation technology, which is the most important method worldwide for separation of finely ground mineral particles. Because of the principles of separation by froth flotation, the experimental work in this research will involve detailed surface-chemical characterization of the minerals and ores of interest. A range of advanced techniques and instrumentation will be employed to determine surface charge characteristics of the minerals, the chemical composition of their surfaces, chemical reactivity and solubility in water, and ability to adsorb reagents. Interactions between fine particles of different minerals will also be investigated to assess their dispersion or aggregation behavior depending on the chemistry of process water (pH, presence of ions, red-ox potential, etc.). A portion of the experimental program will be dedicated to researching 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 scientific outcome. 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 to production of cleaner materials with minimum environmental impact. The results will have a direct influence on the mineral processing industry in Canada and abroad.

这个合作研究项目将研究回收砷中不需要的矿物质的机制