The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite
The effects of adding CaO during a vacuum carbothermal reduction on Fe and Ni recovery yields were examined. In addition, magnetic separation was investigated. Experiments were conducted under pressures ranging from 10 to 50 Pa with different proportions of CaO at different temperatures. The results...
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University of Belgrade, Technical Faculty, Bor
2019-01-01
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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/1450-5339/2019/1450-53391900035W.pdf |
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| author | Wang Q. Qu T. Gu X.-P. Shi L. Yang B. Dai Y. N. |
| author_facet | Wang Q. Qu T. Gu X.-P. Shi L. Yang B. Dai Y. N. |
| author_sort | Wang Q. |
| collection | DOAJ |
| description | The effects of adding CaO during a vacuum carbothermal reduction on Fe and Ni recovery yields were examined. In addition, magnetic separation was investigated. Experiments were conducted under pressures ranging from 10 to 50 Pa with different proportions of CaO at different temperatures. The results indicated that at 1723 K, the mass ratio of ore/C was 100:65.5; when the amount of CaO was 22.64% (the mole ratio of CaO/Si was 1:1), the recovery of Fe and Ni reached 84.33% and 97.00% in the vacuum carbothermal reduction-magnetic separation process, and the enrichment ratios of Fe and Ni were maximized, reaching 6.32 and 6.72, respectively. In addition, the recovery of Mg in the reduction process reached 99.35%. An analysis of the experimental results also indicated that the addition of CaO could cause the Fe-Si alloy to transform into the Fe-Ni alloy in the nickel-rich residue, which increased the content of Fe-Ni in the magnetic separation material from 13.34% to 73.17%. In addition, the concentration in reduced ore of Si from 45.43% increased to 83.68%, which could reduce the evaporation of Si in the form of SiO at high temperatures. If Si volatilized in the form of SiO during the condensation process, SiO would disproportionate to form Si and SiO2 contaminated condensed magnesium. In summary, the valuable metals in the minerals were comprehensively utilized with the addition of CaO. |
| format | Article |
| id | doaj-art-8a0f593bde624b968c0ae517cd4f5762 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-8a0f593bde624b968c0ae517cd4f57622025-02-02T00:51:35ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752019-01-0155335135810.2298/JMMB190213035W1450-53391900035WThe effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnieriteWang Q.0Qu T.1Gu X.-P.2Shi L.3Yang B.4Dai Y. N.5National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology,Kunming, China + Key Laboratory of Vacuum Metallurgy for Nonferrous Metal of Yunnan Province, Kunming University of Science and Technology,Kunming, China +State Key Laboratory of Complex Non-ferrous Metal Resources Clear Utilization, Kunming University of Science and Technology,Kunming, China + National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology,Kunming, ChinaState Key Laboratory of Complex Non-ferrous Metal Resources Clear Utilization, Kunming University of Science and Technology,Kunming, China + National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology,Kunming, ChinaNational Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology,Kunming, China + Key Laboratory of Vacuum Metallurgy for Nonferrous Metal of Yunnan Province, Kunming University of Science and Technology,Kunming, China +State Key Laboratory of Complex Non-ferrous Metal Resources Clear Utilization, Kunming University of Science and Technology,Kunming, China + National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology,Kunming, ChinaNational Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology,Kunming, China + Key Laboratory of Vacuum Metallurgy for Nonferrous Metal of Yunnan Province, Kunming University of Science and Technology,Kunming, China +The effects of adding CaO during a vacuum carbothermal reduction on Fe and Ni recovery yields were examined. In addition, magnetic separation was investigated. Experiments were conducted under pressures ranging from 10 to 50 Pa with different proportions of CaO at different temperatures. The results indicated that at 1723 K, the mass ratio of ore/C was 100:65.5; when the amount of CaO was 22.64% (the mole ratio of CaO/Si was 1:1), the recovery of Fe and Ni reached 84.33% and 97.00% in the vacuum carbothermal reduction-magnetic separation process, and the enrichment ratios of Fe and Ni were maximized, reaching 6.32 and 6.72, respectively. In addition, the recovery of Mg in the reduction process reached 99.35%. An analysis of the experimental results also indicated that the addition of CaO could cause the Fe-Si alloy to transform into the Fe-Ni alloy in the nickel-rich residue, which increased the content of Fe-Ni in the magnetic separation material from 13.34% to 73.17%. In addition, the concentration in reduced ore of Si from 45.43% increased to 83.68%, which could reduce the evaporation of Si in the form of SiO at high temperatures. If Si volatilized in the form of SiO during the condensation process, SiO would disproportionate to form Si and SiO2 contaminated condensed magnesium. In summary, the valuable metals in the minerals were comprehensively utilized with the addition of CaO.http://www.doiserbia.nb.rs/img/doi/1450-5339/2019/1450-53391900035W.pdfgarnieritevacuum carbothermal reductionadditivemagnetic separation |
| spellingShingle | Wang Q. Qu T. Gu X.-P. Shi L. Yang B. Dai Y. N. The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite Journal of Mining and Metallurgy. Section B: Metallurgy garnierite vacuum carbothermal reduction additive magnetic separation |
| title | The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite |
| title_full | The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite |
| title_fullStr | The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite |
| title_full_unstemmed | The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite |
| title_short | The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite |
| title_sort | effect of cao on the recovery of fe and ni in a vacuum carbothermal reduction of garnierite |
| topic | garnierite vacuum carbothermal reduction additive magnetic separation |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2019/1450-53391900035W.pdf |
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