Recovery of silicon powder from kerf loss slurry waste using superconducting high gradient magnetic separation technology
A major challenge in recycling of silicon powder from kerf loss slurry waste is the complete removal of metal particles. The traditional acid leaching method is costly and not green. In this paper, a novel approach to recover high-purity Si from the kerf loss slurry waste of solar grade silicon was...
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| Veröffentlicht in: | Journal of material cycles and waste management 2018-04, Vol.20 (2), p.937-945 |
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| creator | Yang, Changqiao Li, Suqin Yang, Ruiming Bai, Jiaxing Guo, Zijie |
| description | A major challenge in recycling of silicon powder from kerf loss slurry waste is the complete removal of metal particles. The traditional acid leaching method is costly and not green. In this paper, a novel approach to recover high-purity Si from the kerf loss slurry waste of solar grade silicon was investigated. The metal impurities were removed with superconducting high gradient magnetic separation technology. The effects of process parameters such as magnetic flux density, slurry density, and slurry flow velocity on the removal efficiency were investigated, and the parameters were optimized. In one lot of control experiments, the silicon content was increased from 90.91 to 95.83%, iron content reduced from 3.24 to 0.57%, and aluminum content from 2.44 to 1.51% under the optimum conditions of magnetic flux density of 4.0 T, slurry density of 20 g/L, and slurry flow velocity of 500 mL/min. The result indicates that the superconducting high gradient magnetic separation technology is a feasible purifying method, and the magnetic separation concentrate could be used as an intermediate product for high-purity Si powder. |
| doi_str_mv | 10.1007/s10163-017-0656-7 |
| format | Article |
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The traditional acid leaching method is costly and not green. In this paper, a novel approach to recover high-purity Si from the kerf loss slurry waste of solar grade silicon was investigated. The metal impurities were removed with superconducting high gradient magnetic separation technology. The effects of process parameters such as magnetic flux density, slurry density, and slurry flow velocity on the removal efficiency were investigated, and the parameters were optimized. In one lot of control experiments, the silicon content was increased from 90.91 to 95.83%, iron content reduced from 3.24 to 0.57%, and aluminum content from 2.44 to 1.51% under the optimum conditions of magnetic flux density of 4.0 T, slurry density of 20 g/L, and slurry flow velocity of 500 mL/min. The result indicates that the superconducting high gradient magnetic separation technology is a feasible purifying method, and the magnetic separation concentrate could be used as an intermediate product for high-purity Si powder.</description><identifier>ISSN: 1438-4957</identifier><identifier>EISSN: 1611-8227</identifier><identifier>DOI: 10.1007/s10163-017-0656-7</identifier><language>eng</language><publisher>Tokyo: Springer Japan</publisher><subject>Acid leaching ; Aluminum ; Civil Engineering ; Engineering ; Environmental Management ; Flow velocity ; Flux density ; Impurities ; Kerf ; Leaching ; Magnetic flux ; Magnetic separation ; Metal particles ; Original Article ; Powder ; Process parameters ; Purity ; Silicon ; Slurries ; Superconductivity ; Waste Management/Waste Technology</subject><ispartof>Journal of material cycles and waste management, 2018-04, Vol.20 (2), p.937-945</ispartof><rights>The Author(s) 2017</rights><rights>Journal of Material Cycles and Waste Management is a copyright of Springer, (2017). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c396t-a42c97c38071fd0e0cf075d140860e2afde0c87be79760b56cfee5886abbb5bd3</citedby><cites>FETCH-LOGICAL-c396t-a42c97c38071fd0e0cf075d140860e2afde0c87be79760b56cfee5886abbb5bd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10163-017-0656-7$$EPDF$$P50$$Gspringer$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10163-017-0656-7$$EHTML$$P50$$Gspringer$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Yang, Changqiao</creatorcontrib><creatorcontrib>Li, Suqin</creatorcontrib><creatorcontrib>Yang, Ruiming</creatorcontrib><creatorcontrib>Bai, Jiaxing</creatorcontrib><creatorcontrib>Guo, Zijie</creatorcontrib><title>Recovery of silicon powder from kerf loss slurry waste using superconducting high gradient magnetic separation technology</title><title>Journal of material cycles and waste management</title><addtitle>J Mater Cycles Waste Manag</addtitle><description>A major challenge in recycling of silicon powder from kerf loss slurry waste is the complete removal of metal particles. The traditional acid leaching method is costly and not green. In this paper, a novel approach to recover high-purity Si from the kerf loss slurry waste of solar grade silicon was investigated. The metal impurities were removed with superconducting high gradient magnetic separation technology. The effects of process parameters such as magnetic flux density, slurry density, and slurry flow velocity on the removal efficiency were investigated, and the parameters were optimized. In one lot of control experiments, the silicon content was increased from 90.91 to 95.83%, iron content reduced from 3.24 to 0.57%, and aluminum content from 2.44 to 1.51% under the optimum conditions of magnetic flux density of 4.0 T, slurry density of 20 g/L, and slurry flow velocity of 500 mL/min. The result indicates that the superconducting high gradient magnetic separation technology is a feasible purifying method, and the magnetic separation concentrate could be used as an intermediate product for high-purity Si powder.</description><subject>Acid leaching</subject><subject>Aluminum</subject><subject>Civil Engineering</subject><subject>Engineering</subject><subject>Environmental Management</subject><subject>Flow velocity</subject><subject>Flux density</subject><subject>Impurities</subject><subject>Kerf</subject><subject>Leaching</subject><subject>Magnetic flux</subject><subject>Magnetic separation</subject><subject>Metal particles</subject><subject>Original Article</subject><subject>Powder</subject><subject>Process parameters</subject><subject>Purity</subject><subject>Silicon</subject><subject>Slurries</subject><subject>Superconductivity</subject><subject>Waste Management/Waste Technology</subject><issn>1438-4957</issn><issn>1611-8227</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>C6C</sourceid><sourceid>BENPR</sourceid><recordid>eNp1kEtLxDAUhYsoOI7-AHcB19WbtE3apQy-YEAQXYc0vel07DQ1SR36780wgitX98E553K_JLmmcEsBxJ2nQHmWAhUp8IKn4iRZUE5pWjImTmOfZ2WaV4U4Ty683wKwCjKxSOY31PYb3UysIb7rO20HMtp9g44YZ3fkE50hvfWe-H5yUbdXPiCZfDe0xE8juuhoJh0O86ZrN6R1qulwCGSn2gFDp4nHUTkVuhgdUG8G29t2vkzOjOo9Xv3WZfLx-PC-ek7Xr08vq_t1qrOKh1TlTFdCZyUIahpA0AZE0dAcSg7IlGniqhQ1ikpwqAuuDWJRllzVdV3UTbZMbo65o7NfE_ogt3ZyQzwpGbCIjTLgUUWPKu3irw6NHF23U26WFOSBsDwSlpGwPBCWInrY0eOjdmjR_SX_b_oB1fyB1A</recordid><startdate>20180401</startdate><enddate>20180401</enddate><creator>Yang, Changqiao</creator><creator>Li, Suqin</creator><creator>Yang, Ruiming</creator><creator>Bai, Jiaxing</creator><creator>Guo, Zijie</creator><general>Springer Japan</general><general>Springer Nature B.V</general><scope>C6C</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7SR</scope><scope>7ST</scope><scope>7WY</scope><scope>7WZ</scope><scope>7XB</scope><scope>87Z</scope><scope>88I</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8FL</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BEZIV</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FRNLG</scope><scope>F~G</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>K60</scope><scope>K6~</scope><scope>KB.</scope><scope>KR7</scope><scope>L.-</scope><scope>M0C</scope><scope>M2P</scope><scope>PATMY</scope><scope>PDBOC</scope><scope>PQBIZ</scope><scope>PQBZA</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope><scope>SOI</scope></search><sort><creationdate>20180401</creationdate><title>Recovery of silicon powder from kerf loss slurry waste using superconducting high gradient magnetic separation technology</title><author>Yang, Changqiao ; 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The traditional acid leaching method is costly and not green. In this paper, a novel approach to recover high-purity Si from the kerf loss slurry waste of solar grade silicon was investigated. The metal impurities were removed with superconducting high gradient magnetic separation technology. The effects of process parameters such as magnetic flux density, slurry density, and slurry flow velocity on the removal efficiency were investigated, and the parameters were optimized. In one lot of control experiments, the silicon content was increased from 90.91 to 95.83%, iron content reduced from 3.24 to 0.57%, and aluminum content from 2.44 to 1.51% under the optimum conditions of magnetic flux density of 4.0 T, slurry density of 20 g/L, and slurry flow velocity of 500 mL/min. The result indicates that the superconducting high gradient magnetic separation technology is a feasible purifying method, and the magnetic separation concentrate could be used as an intermediate product for high-purity Si powder.</abstract><cop>Tokyo</cop><pub>Springer Japan</pub><doi>10.1007/s10163-017-0656-7</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Acid leaching Aluminum Civil Engineering Engineering Environmental Management Flow velocity Flux density Impurities Kerf Leaching Magnetic flux Magnetic separation Metal particles Original Article Powder Process parameters Purity Silicon Slurries Superconductivity Waste Management/Waste Technology |
| title | Recovery of silicon powder from kerf loss slurry waste using superconducting high gradient magnetic separation technology |
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