Application of Vacuum Gasification and Separation Technology in the Extraction of Rare Precious Metals
Rare precious metals such as gold,silver,platinum,palladium,and selenium are essential strategic metals for safeguarding national security and the development of the national economy.The main method for ex-tracting precious metals from silver and gold ores is cyanide leaching,which unavoidably produces highly toxic substances such as cyanide residues and wastewater.In the past 30 years,the extraction of rare precious metals from the intermediate materials of copper and lead has been vigorously developed.However,environmental pollu-tion,low resource utilization efficiency,high energy consumption,and long production cycles have been significant challenges,severely constraining the sustainable development of the non-ferrous metal smelting industry.The re-search team,through cooperation between industry,academia,and research,has solved theoretical and engineering technical challenges in vacuum gasification separation,invented the technology and equipment for vacuum gasifi-cation separation of rare precious metal multi-element alloys,overcome the efficient separation challenges of"heavy metals and precious metals","rare scattered metals and precious metals",and"precious metals and pre-cious metals",and established a new technology for green,efficient,and short-process production of rare pre-cious metals with the core process of"high-temperature smelting capture-solution electrolysis enrichment-vacuum gasification separation-cascading refining".This innovation enables the extraction of gold,silver,plati-num,palladium,and selenium with 99.99%purity from raw materials with concentrations as low as one mil-lionth,achieving large-scale industrial applications.
rare precious metalsvacuum vaporizationgreen new technologyindustrial application
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