A Robust Recovery of Ni From Laterite Ore Promoted by Sodium Thiosulfate Through Hydrogen-Thermal Reduction
Laterite ore is one of the important sources of nickel (Ni). However, it is difficult to liberate Ni from ore structure during reduction roasting. This paper provided an effective way for a robust recovery of Ni from laterite ore by H2 reduction using sodium thiosulfate (Na2S2O3) as a promoter. . It...
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Frontiers Media S.A.
2021-06-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2021.704012/full |
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doaj-d3851a7f731d4f959af5205ed6afc1482021-06-25T05:03:19ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462021-06-01910.3389/fchem.2021.704012704012A Robust Recovery of Ni From Laterite Ore Promoted by Sodium Thiosulfate Through Hydrogen-Thermal ReductionShoujun Liu0Shoujun Liu1Shoujun Liu2Chao Yang3Chao Yang4Song Yang5Song Yang6Zhongliang Yu7Zhongliang Yu8Zhao Wang9Zhao Wang10Kang Yan11Kang Yan12Jin Li13Jin Li14Xingyang Liu15Xingyang Liu16College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, ChinaShanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan, ChinaKey Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan, ChinaShanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan, ChinaKey Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, ChinaShanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan, ChinaShanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan, ChinaSchool of Chemistry and Environmental Science, Shangrao Normal University, Shangrao, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, ChinaShanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, ChinaShanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan, ChinaShanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan, ChinaTaiyuan Green Coke Energy Co. Ltd., Taiyuan, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, ChinaShanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan, ChinaLaterite ore is one of the important sources of nickel (Ni). However, it is difficult to liberate Ni from ore structure during reduction roasting. This paper provided an effective way for a robust recovery of Ni from laterite ore by H2 reduction using sodium thiosulfate (Na2S2O3) as a promoter. . It was found that a Ni content of 9.97% and a Ni recovery of 99.24% were achieved with 20 wt% Na2S2O3 at 1,100°C. The promoting mechanism of Na2S2O3 in laterite ore reduction by H2 was also investigated. The thermogravimetric results suggested the formation of Na2Mg2SiO7, Na2SO3, Na2SO4, and S during the pyrolysis of laterite with Na2S2O3, among which the alkali metal salts could destroy the structures of nickel-bearing silicate minerals and hence release Ni, while S could participate in the formation of the low-melting-point eutectic phase of FeS-Fe. The formation of low-melting-point phases were further verified by the morphology analysis, which could improve the aggregation of Ni-Fe particles due to the capillary forces of FeS-Fe as well as the enhanced element migration by the liquid phase of sodium silicates during reduction.https://www.frontiersin.org/articles/10.3389/fchem.2021.704012/fulllaterite oresodium thiosulfatehydrogen reductionferronickelmagnetic separationmechanism |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Shoujun Liu Shoujun Liu Shoujun Liu Chao Yang Chao Yang Song Yang Song Yang Zhongliang Yu Zhongliang Yu Zhao Wang Zhao Wang Kang Yan Kang Yan Jin Li Jin Li Xingyang Liu Xingyang Liu |
| spellingShingle |
Shoujun Liu Shoujun Liu Shoujun Liu Chao Yang Chao Yang Song Yang Song Yang Zhongliang Yu Zhongliang Yu Zhao Wang Zhao Wang Kang Yan Kang Yan Jin Li Jin Li Xingyang Liu Xingyang Liu A Robust Recovery of Ni From Laterite Ore Promoted by Sodium Thiosulfate Through Hydrogen-Thermal Reduction Frontiers in Chemistry laterite ore sodium thiosulfate hydrogen reduction ferronickel magnetic separation mechanism |
| author_facet |
Shoujun Liu Shoujun Liu Shoujun Liu Chao Yang Chao Yang Song Yang Song Yang Zhongliang Yu Zhongliang Yu Zhao Wang Zhao Wang Kang Yan Kang Yan Jin Li Jin Li Xingyang Liu Xingyang Liu |
| author_sort |
Shoujun Liu |
| title |
A Robust Recovery of Ni From Laterite Ore Promoted by Sodium Thiosulfate Through Hydrogen-Thermal Reduction |
| title_short |
A Robust Recovery of Ni From Laterite Ore Promoted by Sodium Thiosulfate Through Hydrogen-Thermal Reduction |
| title_full |
A Robust Recovery of Ni From Laterite Ore Promoted by Sodium Thiosulfate Through Hydrogen-Thermal Reduction |
| title_fullStr |
A Robust Recovery of Ni From Laterite Ore Promoted by Sodium Thiosulfate Through Hydrogen-Thermal Reduction |
| title_full_unstemmed |
A Robust Recovery of Ni From Laterite Ore Promoted by Sodium Thiosulfate Through Hydrogen-Thermal Reduction |
| title_sort |
robust recovery of ni from laterite ore promoted by sodium thiosulfate through hydrogen-thermal reduction |
| publisher |
Frontiers Media S.A. |
| series |
Frontiers in Chemistry |
| issn |
2296-2646 |
| publishDate |
2021-06-01 |
| description |
Laterite ore is one of the important sources of nickel (Ni). However, it is difficult to liberate Ni from ore structure during reduction roasting. This paper provided an effective way for a robust recovery of Ni from laterite ore by H2 reduction using sodium thiosulfate (Na2S2O3) as a promoter. . It was found that a Ni content of 9.97% and a Ni recovery of 99.24% were achieved with 20 wt% Na2S2O3 at 1,100°C. The promoting mechanism of Na2S2O3 in laterite ore reduction by H2 was also investigated. The thermogravimetric results suggested the formation of Na2Mg2SiO7, Na2SO3, Na2SO4, and S during the pyrolysis of laterite with Na2S2O3, among which the alkali metal salts could destroy the structures of nickel-bearing silicate minerals and hence release Ni, while S could participate in the formation of the low-melting-point eutectic phase of FeS-Fe. The formation of low-melting-point phases were further verified by the morphology analysis, which could improve the aggregation of Ni-Fe particles due to the capillary forces of FeS-Fe as well as the enhanced element migration by the liquid phase of sodium silicates during reduction. |
| topic |
laterite ore sodium thiosulfate hydrogen reduction ferronickel magnetic separation mechanism |
| url |
https://www.frontiersin.org/articles/10.3389/fchem.2021.704012/full |
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