Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermal
Because the crude niobium ore is difficult to be used, according to the composition analysis and phase analysis of crude niobium ore, the KOH hydrothermal method was used to research the dissolution of crude niobium ore and the dissolution of crude niobium under hydrothermal system was researched by...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Emergency Management Press
2017-02-01
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| Series: | 矿业科学学报 |
| Subjects: | |
| Online Access: | http://kykxxb.cumtb.edu.cn/article/id/50 |
| _version_ | 1811315751008600064 |
|---|---|
| author | Wang Weidong Li Zhao Wang Xiaohui Zheng Shili |
| author_facet | Wang Weidong Li Zhao Wang Xiaohui Zheng Shili |
| author_sort | Wang Weidong |
| collection | DOAJ |
| description | Because the crude niobium ore is difficult to be used, according to the composition analysis and phase analysis of crude niobium ore, the KOH hydrothermal method was used to research the dissolution of crude niobium ore and the dissolution of crude niobium under hydrothermal system was researched by changing the temperature and the KOH concentration.The results show that the dissolution of niobium from crude niobium ore could reach 90%, at 30%of KOH concentration, and 200℃; the dissolution of niobium increased first and then decreased with the increasings of KOH concentration and temperature; in the whole process of the dissolution, the alkaline components Fe, Mn, Mg kept a low dissolution yields.XRD and SEM's results show that the increasings of KOH concentration and temperature accelerated the decomposition of(Fe, Mn)(Nb, Ta)<sub>2</sub>O<sub>6</sub>.When the KOH concentration was 30%, and the temperature was 200℃, continuing to strengthen the reaction conditions, the dissolution of Nb decreased significantly owing to the transformation from soluble K<sub>8</sub>Nb<sub>6</sub>O<sub>19</sub>to insolubleKNbO<sub>3</sub>. |
| first_indexed | 2024-04-13T11:36:55Z |
| format | Article |
| id | doaj.art-fcd0fdd6f6d646e394dda4a571d3a581 |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-13T11:36:55Z |
| publishDate | 2017-02-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-fcd0fdd6f6d646e394dda4a571d3a5812022-12-22T02:48:26ZengEmergency Management Press矿业科学学报2096-21932017-02-01217581Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermalWang Weidong0Li Zhao1Wang Xiaohui2Zheng Shili3School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, ChinaInstitute of Process Engineering, Chinese Academy of Science, Beijing 100190, ChinaInstitute of Process Engineering, Chinese Academy of Science, Beijing 100190, ChinaBecause the crude niobium ore is difficult to be used, according to the composition analysis and phase analysis of crude niobium ore, the KOH hydrothermal method was used to research the dissolution of crude niobium ore and the dissolution of crude niobium under hydrothermal system was researched by changing the temperature and the KOH concentration.The results show that the dissolution of niobium from crude niobium ore could reach 90%, at 30%of KOH concentration, and 200℃; the dissolution of niobium increased first and then decreased with the increasings of KOH concentration and temperature; in the whole process of the dissolution, the alkaline components Fe, Mn, Mg kept a low dissolution yields.XRD and SEM's results show that the increasings of KOH concentration and temperature accelerated the decomposition of(Fe, Mn)(Nb, Ta)<sub>2</sub>O<sub>6</sub>.When the KOH concentration was 30%, and the temperature was 200℃, continuing to strengthen the reaction conditions, the dissolution of Nb decreased significantly owing to the transformation from soluble K<sub>8</sub>Nb<sub>6</sub>O<sub>19</sub>to insolubleKNbO<sub>3</sub>.http://kykxxb.cumtb.edu.cn/article/id/50the crude niobium orekohhydrothermal systemk<sub>8</sub>nb<sub>6</sub>o<sub>19</sub>knbo<sub>3</sub> |
| spellingShingle | Wang Weidong Li Zhao Wang Xiaohui Zheng Shili Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermal 矿业科学学报 the crude niobium ore koh hydrothermal system k<sub>8</sub>nb<sub>6</sub>o<sub>19</sub> knbo<sub>3</sub> |
| title | Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermal |
| title_full | Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermal |
| title_fullStr | Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermal |
| title_full_unstemmed | Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermal |
| title_short | Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermal |
| title_sort | experimental study on the extraction of niobium from crude niobium ore by koh hydrothermal |
| topic | the crude niobium ore koh hydrothermal system k<sub>8</sub>nb<sub>6</sub>o<sub>19</sub> knbo<sub>3</sub> |
| url | http://kykxxb.cumtb.edu.cn/article/id/50 |
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