Removing boron from metallurgical grade silicon by a high basic slag refining technique
A new purification method of removing boron from metallurgical grade silicon (MG-Si) using a high baisicity slag was developed in this paper. The typical impurities Al, Ca, Ti, B, P etc in MG-Si can be removed by the binary calcium sillicate slag and it is especially efficient for removing...
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University of Belgrade, Technical Faculty, Bor
2014-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400005W.pdf |
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| author | Wu J.J. Xu M. Liu K.B. Ma W.H. Yang B. Dai Y.N. |
| author_facet | Wu J.J. Xu M. Liu K.B. Ma W.H. Yang B. Dai Y.N. |
| author_sort | Wu J.J. |
| collection | DOAJ |
| description | A new purification method of removing boron from metallurgical grade silicon
(MG-Si) using a high baisicity slag was developed in this paper. The typical
impurities Al, Ca, Ti, B, P etc in MG-Si can be removed by the binary calcium
sillicate slag and it is especially efficient for removing impurity Boron. It
was found that the maximal distribution coefficient of boron between calcium
sillicate slag and silicon reaches to 1.57 when the mass ratio of CaO/SiO2
was 1.5 and the composition was 60%CaO-40%SiO2. It showed that the
oxidizability of calcium sillicate slag was affected and restricted by the
basicity and the mass ratio of acid oxide SiO slag according to the
thermodynamic relationship. The boron concentration in MG-Si can be reduced
from 18x10-6 to 4.5x10-6 and 1.4x10-6, respectively, when using the ternary
slags 40.5%CaO-49.5%SiO2-10%Li2O and 32CaO-38%SiO2-30%Li2O. |
| format | Article |
| id | doaj-art-ffd713e70e2c4dd3bdee90ed428b5937 |
| institution | Kabale University |
| issn | 1450-5339 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-ffd713e70e2c4dd3bdee90ed428b59372025-02-02T02:20:56ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392014-01-01501838610.2298/JMMB140202005W1450-53391400005WRemoving boron from metallurgical grade silicon by a high basic slag refining techniqueWu J.J.0Xu M.1Liu K.B.2Ma W.H.3Yang B.4Dai Y.N.5State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming University of Science and Technology, Kunming, China + Key Laboratory of Non-Ferrous Metals Vacuum Metallurgy of Yunnan Province, KunKey Laboratory of Non-Ferrous Metals Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming, China + Engineering Research Center for Silicon Metallurgy and Silicon Materials of Yunnan Provincial Universities, Kunming UKey Laboratory of Non-Ferrous Metals Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming, China + Engineering Research Center for Silicon Metallurgy and Silicon Materials of Yunnan Provincial Universities, Kunming UState Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming University of Science and Technology, Kunming, China + Key Laboratory of Non-Ferrous Metals Vacuum Metallurgy of Yunnan Province, KunKey Laboratory of Non-Ferrous Metals Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming, China + Engineering Research Center for Silicon Metallurgy and Silicon Materials of Yunnan Provincial Universities, Kunming UState Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province, Kunming University of Science and Technology, Kunming, China + Key Laboratory of Non-Ferrous Metals Vacuum Metallurgy of Yunnan Province, KunA new purification method of removing boron from metallurgical grade silicon (MG-Si) using a high baisicity slag was developed in this paper. The typical impurities Al, Ca, Ti, B, P etc in MG-Si can be removed by the binary calcium sillicate slag and it is especially efficient for removing impurity Boron. It was found that the maximal distribution coefficient of boron between calcium sillicate slag and silicon reaches to 1.57 when the mass ratio of CaO/SiO2 was 1.5 and the composition was 60%CaO-40%SiO2. It showed that the oxidizability of calcium sillicate slag was affected and restricted by the basicity and the mass ratio of acid oxide SiO slag according to the thermodynamic relationship. The boron concentration in MG-Si can be reduced from 18x10-6 to 4.5x10-6 and 1.4x10-6, respectively, when using the ternary slags 40.5%CaO-49.5%SiO2-10%Li2O and 32CaO-38%SiO2-30%Li2O.http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400005W.pdfmetallurgical grade siliconboronmolten slagbasicitydistribution coefficient |
| spellingShingle | Wu J.J. Xu M. Liu K.B. Ma W.H. Yang B. Dai Y.N. Removing boron from metallurgical grade silicon by a high basic slag refining technique Journal of Mining and Metallurgy. Section B: Metallurgy metallurgical grade silicon boron molten slag basicity distribution coefficient |
| title | Removing boron from metallurgical grade silicon by a high basic slag refining technique |
| title_full | Removing boron from metallurgical grade silicon by a high basic slag refining technique |
| title_fullStr | Removing boron from metallurgical grade silicon by a high basic slag refining technique |
| title_full_unstemmed | Removing boron from metallurgical grade silicon by a high basic slag refining technique |
| title_short | Removing boron from metallurgical grade silicon by a high basic slag refining technique |
| title_sort | removing boron from metallurgical grade silicon by a high basic slag refining technique |
| topic | metallurgical grade silicon boron molten slag basicity distribution coefficient |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400005W.pdf |
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