Perspectives for the recovery of rare earths from end-of-life fluorescent lamps
来源期刊：JOURNAL OF RARE EARTHS2014年第3期
论文作者：K.Binnemans P.T.Jones
文章页码：195 - 200
摘 要：This vision paper discusses the advantages and disadvantages of the three main options for the recycling of rare-earth elements from end-of-life fluorescent lamps:（1） direct re-use of the lamp phosphor mixture;（2） separation of the lamp phosphor mixture into the different phosphor components;（3） recovery of the rare-earth content. An overview is given of commercial activities in Europe in the domain of recycling of materials from end-of-life fluorescent lamps and the recovery of rare earths from these lamps. The collection of end-of-life fluorescent lamps is currently driven by a legal framework that prohibited the release of mercury to the environment. The contaminations of the lamp phosphor powders by mercury and by small glass particles of crushed fluorescent lamps are limiting factors in the recycling process. Research should be directed to an advanced clean-up of the reclaimed lamp phosphor fraction, and in particular to the removal of mercury and glass fragments. The recovery of rare earths from the lamp phosphors could be facilitated by taking advantage of the differences in resistance of the different lamp phosphors by chemical attack by inorganic acids and bases.
K.Binnemans1，P.T.Jones2
1. Department of Chemistry, KU Leuven – University of Leuven,Celestijnenlaan 200F- box 2404, B-3001 Heverlee, Belgium2. Department of Metallurgy and Materials Engineering, KU Leuven – University of Leuven,Kasteelpark Arenberg 44 - box 2450, B-3001 Heverlee, Belgium
摘 要：This vision paper discusses the advantages and disadvantages of the three main options for the recycling of rare-earth elements from end-of-life fluorescent lamps:（1） direct re-use of the lamp phosphor mixture;（2） separation of the lamp phosphor mixture into the different phosphor components;（3） recovery of the rare-earth content. An overview is given of commercial activities in Europe in the domain of recycling of materials from end-of-life fluorescent lamps and the recovery of rare earths from these lamps. The collection of end-of-life fluorescent lamps is currently driven by a legal framework that prohibited the release of mercury to the environment. The contaminations of the lamp phosphor powders by mercury and by small glass particles of crushed fluorescent lamps are limiting factors in the recycling process. Research should be directed to an advanced clean-up of the reclaimed lamp phosphor fraction, and in particular to the removal of mercury and glass fragments. The recovery of rare earths from the lamp phosphors could be facilitated by taking advantage of the differences in resistance of the different lamp phosphors by chemical attack by inorganic acids and bases.
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