Synthesis of scheelite from sodium tungstate solution by calcium hydroxide addition
Sodium tungstate solution can be prepared by decomposing wolframite with sodium hydroxide. A new technique is developed for precipitating scheelite from the sodium tungstate solution by the addition of calcium hydroxide. In this study, the effects of several variables on the conversion of sodium tun...
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| Veröffentlicht in: | Hydrometallurgy 2015-04, Vol.154, p.17-19 |
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| container_title | Hydrometallurgy |
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| creator | Wan, Linsheng Huang, Xiaojing Deng, Dengfei Li, Hongchao Chen, Yongming |
| description | Sodium tungstate solution can be prepared by decomposing wolframite with sodium hydroxide. A new technique is developed for precipitating scheelite from the sodium tungstate solution by the addition of calcium hydroxide. In this study, the effects of several variables on the conversion of sodium tungstate are investigated. Results show that the effects of temperature and sodium tungstate concentration are significant. Specifically, 96.4% WO42− was converted to scheelite in 2h at 100°C with a calcium hydroxide stoichiometric ratio of 1.4 and a stirring speed of 350rpm. The parent solution containing sodium hydroxide can be recycled as a leaching agent return to the wolframite decomposition process.
•Synthesis of scheelite from sodium tungstate solution with addition of calcium hydroxide was successfully achieved.•Effects of processing parameters on the conversion of sodium tungstate were presented.•Optimal processing parameters in the process of synthesizing scheelite were selected. |
| doi_str_mv | 10.1016/j.hydromet.2015.03.010 |
| format | Article |
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•Synthesis of scheelite from sodium tungstate solution with addition of calcium hydroxide was successfully achieved.•Effects of processing parameters on the conversion of sodium tungstate were presented.•Optimal processing parameters in the process of synthesizing scheelite were selected.</description><subject>Calcium hydroxide</subject><subject>Conversion</subject><subject>Decomposition</subject><subject>Recycled</subject><subject>Scheelite</subject><subject>Slaked lime</subject><subject>Sodium hydroxide</subject><subject>Sodium tungstate</subject><subject>Wolframite</subject><issn>0304-386X</issn><issn>1879-1158</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LxDAQhoMouK7-BcnRS-tk06bpTVn8ggUPq-AtdJOJm6Vt1iYV--9tXT17Gpj3Y5iHkEsGKQMmrnfpdjCdbzCmC2B5CjwFBkdkxmRRJozl8pjMgEOWcCneTslZCDsAELxgM7JeD23cYnCBekuD3iLWLiK1YyEN3ri-obFv30Osxm3wdR-db-lmoLqq9aT-HP9yBmlljJvUc3Jiqzrgxe-ck9f7u5flY7J6fnha3q4SzbM8JsxiaUsGNpO51KLU1motpFywXJSZBFFYXlawAJnpQlRSG15utOBlbqywbMPn5OrQu-_8R48hqsYFjXVdtej7oFhRAGdCghyt4mDVnQ-hQ6v2nWuqblAM1ERR7dQfRTVRVMDVSHEM3hyCOD7y6bBTQTtsNRrXoY7KePdfxTczh4Bs</recordid><startdate>20150401</startdate><enddate>20150401</enddate><creator>Wan, Linsheng</creator><creator>Huang, Xiaojing</creator><creator>Deng, Dengfei</creator><creator>Li, Hongchao</creator><creator>Chen, Yongming</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20150401</creationdate><title>Synthesis of scheelite from sodium tungstate solution by calcium hydroxide addition</title><author>Wan, Linsheng ; Huang, Xiaojing ; Deng, Dengfei ; Li, Hongchao ; Chen, Yongming</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c345t-1fe9f910f4858c69cffcc6882156948067f39a02084c76a8cd39bc6395df6f1b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Calcium hydroxide</topic><topic>Conversion</topic><topic>Decomposition</topic><topic>Recycled</topic><topic>Scheelite</topic><topic>Slaked lime</topic><topic>Sodium hydroxide</topic><topic>Sodium tungstate</topic><topic>Wolframite</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wan, Linsheng</creatorcontrib><creatorcontrib>Huang, Xiaojing</creatorcontrib><creatorcontrib>Deng, Dengfei</creatorcontrib><creatorcontrib>Li, Hongchao</creatorcontrib><creatorcontrib>Chen, Yongming</creatorcontrib><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Hydrometallurgy</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wan, Linsheng</au><au>Huang, Xiaojing</au><au>Deng, Dengfei</au><au>Li, Hongchao</au><au>Chen, Yongming</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Synthesis of scheelite from sodium tungstate solution by calcium hydroxide addition</atitle><jtitle>Hydrometallurgy</jtitle><date>2015-04-01</date><risdate>2015</risdate><volume>154</volume><spage>17</spage><epage>19</epage><pages>17-19</pages><issn>0304-386X</issn><eissn>1879-1158</eissn><abstract>Sodium tungstate solution can be prepared by decomposing wolframite with sodium hydroxide. A new technique is developed for precipitating scheelite from the sodium tungstate solution by the addition of calcium hydroxide. In this study, the effects of several variables on the conversion of sodium tungstate are investigated. Results show that the effects of temperature and sodium tungstate concentration are significant. Specifically, 96.4% WO42− was converted to scheelite in 2h at 100°C with a calcium hydroxide stoichiometric ratio of 1.4 and a stirring speed of 350rpm. The parent solution containing sodium hydroxide can be recycled as a leaching agent return to the wolframite decomposition process.
•Synthesis of scheelite from sodium tungstate solution with addition of calcium hydroxide was successfully achieved.•Effects of processing parameters on the conversion of sodium tungstate were presented.•Optimal processing parameters in the process of synthesizing scheelite were selected.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.hydromet.2015.03.010</doi><tpages>3</tpages></addata></record> |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Calcium hydroxide Conversion Decomposition Recycled Scheelite Slaked lime Sodium hydroxide Sodium tungstate Wolframite |
| title | Synthesis of scheelite from sodium tungstate solution by calcium hydroxide addition |
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