Separation of gold and other rare materials from an ensemble of heterogeneous particles using a NdFeB magnetic circuit
| Autor: | Chiaki Uyeda, Kentaro Terada, Keiji Hisayoshi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Multidisciplinary Materials science Field (physics) lcsh:R Magnetic separation chemistry.chemical_element lcsh:Medicine equipment and supplies Article Bismuth Magnetic circuit 03 medical and health sciences Paramagnetism 030104 developmental biology 0302 clinical medicine Neodymium magnet chemistry Chemical physics Diamagnetism Particle lcsh:Q lcsh:Science 030217 neurology & neurosurgery |
| Zdroj: | Scientific Reports Scientific Reports, Vol 9, Iss 1, Pp 1-6 (2019) |
| ISSN: | 2045-2322 |
| Popis: | Most solid particles, composed of diamagnetic or weak paramagnetic materials, cannot be extracted by a conventional magnetic separator. Here we report that an ensemble of heterogeneous particles, composed of bismuth, gold, graphite and rock forming minerals are separated into fractions of different materials by small NdFeB magnetic plates. It is based on a recent finding that acceleration of a translating particle, induced by magnetic volume force in an area of field gradient, is uniquely determined by intrinsic susceptibility of material; the acceleration is independent to particle mass. The setup will serve as an effective technique of pre-treatment in analysing mixture of heterogeneous particles; such a technique is desired in various research fields of science, and the magnetic separation may play a role of a “chromatography technique” conventionally used in the analysis of organic molecules. The portable and low-cost system could provide a breakthrough for on-site research in industrial and medical fields as well as in resource explorations in nature. Extraction of rare materials such as gold or platinum becomes possible in a hazardless manner. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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