| Preparation of High－purity Sodium Tungstate from Low－grade Tung－sten－concentrate with a High Content of Calcium and Other Impurities |
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| 引用本文： | 孙培梅,陈洲溪,李洪桂,李运姣,梁永堂,陈树翘.Preparation of High－purity Sodium Tungstate from Low－grade Tung－sten－concentrate with a High Content of Calcium and Other Impurities[J].稀有金属(英文版),1996(2). |
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| 作者姓名： | 孙培梅 陈洲溪 李洪桂 李运姣 梁永堂 陈树翘 |
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| 作者单位： | Sun Peimei;Chen Zhouxi;Li Honggui;Li Yunjiao and Liu Maosheng(Dept of Non-ferrous Metallurgy，Central South University of Technology，Changsha 410083，China)Liang Yongtang; Chen Shuqiao(Siquan Chemical Industrial Plant，Tunan 527100，China)Received 12 Decemb |
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| 摘 要： | ＰｒｅｐａｒａｔｉｏｎｏｆＨｉｇｈ－ｐｕｒｉｔｙＳｏｄｉｕｍＴｕｎｇｓｔａｔｅｆｒｏｍＬｏｗ－ｇｒａｄｅＴｕｎｇ－ｓｔｅｎ－ｃｏｎｃｅｎｔｒａｔｅｗｉｔｈａＨｉｇｈＣｏｎｔｅｎｔｏｆＣａｌｃｉｕｍａｎｄＯｔｈｅｒＩｍｐｕｒｉｔｉｅｓＳｕｎＰｅｉｍｅｉ...
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Preparation of High-purity Sodium Tungstate from Low-grade Tung-sten-concentrate with a High Content of Calcium and Other Impurities |
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| Sun Peimei,Chen Zhouxi,Li Honggui,Li Yunjiao and Liu Maosheng.Preparation of High-purity Sodium Tungstate from Low-grade Tung-sten-concentrate with a High Content of Calcium and Other Impurities[J].Rare Metals,1996(2). |
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| Authors: | Sun Peimei Chen Zhouxi Li Honggui Li Yunjiao and Liu Maosheng |
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| Abstract: | A new technological process for production of talium tungstate from low-grade tungsten-concentrate witha high content of calcium and other impurities has been studied. The experiments showed that average tungstenleaching efficiency of more than 96. 92 % can be obtained with a low NaOH consumption by using the mechani-cal activating caustic decomposition , and the content of main impurities (P, As, Si) in Na_2WO_4 solution ob-tained is competitive with that from standard wolframite concentrate by traditional caustic decomposition. Afterrecovering caustic liquor by first crystallization, molylxlenum is removed from Na_2WO_4 solution by ion ex-change method. High-purity sodium tungstate is obtained by second crystallization of Na_2WO_4 solution. Thistechnology has the advantages of good adaptability for raw materials, high removing efficiency of impurities,high tungsten recovery and high economic benefit. |
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| Keywords: | Low-grade tungsten-concentrate Mechanical activating causticdecomposition Ion exchange High-purity sodium tungstate |
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