Production of High-Purity Quartz Concentrate by Electrical Pulse Fragmentation
| Parent link: | 20th International Symposium on High-Current Electronics (ISHCE): proceedings, Tomsk, Russia, September 16-22, 2018/ National Research Tomsk Polytechnic University (TPU) ; Institute of Electrical and Electronics Engineers (IEEE). [P. 162-165].— , 2018 |
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| Corporate Authors: | , |
| Other Authors: | , , , , |
| Summary: | Title screen The demand for pure and highly pure raw quartz materials has increased in recent years due to the need for production of ceramic materials, silicon carbide (SiC) and silicon nitride (Si3N4 ) products, as well as for production of silicon and nanomaterials for various and special applications. Considering the depletion of traditional deposits of pure quartz, the problem of using abundant quartz rocks in industry attracts a lot of attention. According to the literature data, promising sources of quartz can be the quartzites in the “Bural-Sardak” (Buryat Republic, Russia) and “Antonovskoye” (Western Siberia, Russia) deposits that contain 97 ... 99 % of SiO2 . The special purity of these quartzites is due to their unique conditions of formation. Production high-purity quartz concentrate from initially dense chemically pure quartzites requires special methods of rocks grinding with a minimal addition of a “hardware” contaminating material. An attractive method is the electrical pulse fragmentation, where a high-voltage discharge is used as a grinding tool. We studied the material and element composition of impurities in electrical pulse method of fragmentation. The fragmentation was carried out at a pulse-periodic generator with the pulse repetition up to 10 Hz; the energy stored in a high-voltage capacitive storage of up to 400 J and the voltage level of up to 300 kV. The electrodes of the fragmentation chamber are made of stainless steel. The working medium is water. The regime of fragmentation ensures the production of quartz concentrate with a grain size of 0.01 ... 0.5 mm in a series of 1000 pulses from a pre-prepared lump quartz with a fraction size ~25 mm. The analysis of quartzites before and after fragmentation was carried out with both optical microscope and scanning electron microscope with energy dispersive spectrometer. In an initial sample of quartzite, no inclusions of accessory minerals and other impurities were observed. As a result of the electrical. Режим доступа: по договору с организацией-держателем ресурса |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://doi.org/10.1109/ISHCE.2018.8521215 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=659357 |
| Summary: | Title screen The demand for pure and highly pure raw quartz materials has increased in recent years due to the need for production of ceramic materials, silicon carbide (SiC) and silicon nitride (Si3N4 ) products, as well as for production of silicon and nanomaterials for various and special applications. Considering the depletion of traditional deposits of pure quartz, the problem of using abundant quartz rocks in industry attracts a lot of attention. According to the literature data, promising sources of quartz can be the quartzites in the “Bural-Sardak” (Buryat Republic, Russia) and “Antonovskoye” (Western Siberia, Russia) deposits that contain 97 ... 99 % of SiO2 . The special purity of these quartzites is due to their unique conditions of formation. Production high-purity quartz concentrate from initially dense chemically pure quartzites requires special methods of rocks grinding with a minimal addition of a “hardware” contaminating material. An attractive method is the electrical pulse fragmentation, where a high-voltage discharge is used as a grinding tool. We studied the material and element composition of impurities in electrical pulse method of fragmentation. The fragmentation was carried out at a pulse-periodic generator with the pulse repetition up to 10 Hz; the energy stored in a high-voltage capacitive storage of up to 400 J and the voltage level of up to 300 kV. The electrodes of the fragmentation chamber are made of stainless steel. The working medium is water. The regime of fragmentation ensures the production of quartz concentrate with a grain size of 0.01 ... 0.5 mm in a series of 1000 pulses from a pre-prepared lump quartz with a fraction size ~25 mm. The analysis of quartzites before and after fragmentation was carried out with both optical microscope and scanning electron microscope with energy dispersive spectrometer. In an initial sample of quartzite, no inclusions of accessory minerals and other impurities were observed. As a result of the electrical. Режим доступа: по договору с организацией-держателем ресурса |
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| DOI: | 10.1109/ISHCE.2018.8521215 |