Recovery of Gallium from Secondary V-Recycling Slag by Alkali Fusion
Secondary V-recycling slag, an industrial waste containing high gallium is being dumped continuously, which causes the loss of gallium. Thus, the alkali fusion process was employed to recover gallium from this slag. The effects factors on extraction of gallium such as roasting temperature, roasting...
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Published in | 6th International Symposium on High-Temperature Metallurgical Processing pp. 533 - 540 |
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Format | Book Chapter |
Language | English |
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Abstract | Secondary V-recycling slag, an industrial waste containing high gallium is being dumped continuously, which causes the loss of gallium. Thus, the alkali fusion process was employed to recover gallium from this slag. The effects factors on extraction of gallium such as roasting temperature, roasting time, alkali fusion agent concentration and CaO concentration were investigated in the paper. The experimental results indicated that excessive roasting temperature and roasting time is unfavorable to the recovery rate of gallium. The appropriate roasting temperature and duration are 1000°C and 2 hours, respectively; The appropriate proportioning of Na2CO3: NaOH is 2:1 when the concentration of alkali fusion agent weighs 0.4 times the mass of the slag; In order to remove SiO2 from the leaching liquor, CaO should be used as an additive in the roasting process. The appropriate concentration of CaO should weigh 0.2 times the mass of the slag. Employing these optimal alkali fusion conditions in the roasting process, gallium recovery is above 90%. |
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AbstractList | Secondary V-recycling slag, an industrial waste containing high gallium is being dumped continuously, which causes the loss of gallium. Thus, the alkali fusion process was employed to recover gallium from this slag. The effects factors on extraction of gallium such as roasting temperature, roasting time, alkali fusion agent concentration and CaO concentration were investigated in the paper. The experimental results indicated that excessive roasting temperature and roasting time is unfavorable to the recovery rate of gallium. The appropriate roasting temperature and duration are 1000°C and 2 hours, respectively; The appropriate proportioning of Na2CO3: NaOH is 2:1 when the concentration of alkali fusion agent weighs 0.4 times the mass of the slag; In order to remove SiO2 from the leaching liquor, CaO should be used as an additive in the roasting process. The appropriate concentration of CaO should weigh 0.2 times the mass of the slag. Employing these optimal alkali fusion conditions in the roasting process, gallium recovery is above 90%. |
Author | Gao, Lei Zhang, Gui-fang Shi, Zhe |
Author_xml | – sequence: 1 givenname: Lei surname: Gao fullname: Gao, Lei organization: Faculty of Metallurgical and Energy Engineering, Kunming University of Science & Technology, Kunming, Yunnan, China – sequence: 2 givenname: Zhe surname: Shi fullname: Shi, Zhe email: zheshi.kust@hotmail.com organization: Faculty of Metallurgical and Energy Engineering, Kunming University of Science & Technology, Kunming, Yunnan, China – sequence: 3 givenname: Gui-fang surname: Zhang fullname: Zhang, Gui-fang organization: Faculty of Metallurgical and Energy Engineering, Kunming University of Science & Technology, Kunming, Yunnan, China |
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Copyright | TMS (The Minerals, Metals & Materials Society) 2015 |
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DOI | 10.1007/978-3-319-48217-0_67 |
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Discipline | Engineering |
EISBN | 9783319482170 3319482173 |
Editor | Yücel, Onuralp Sohn, Hong Yong Hwang, Jiann-Yang Jiang, Tao Mao, Xinping Ma, Naiyang Mackey, Phillip J. Battle, Thomas P. Alvear F., Gerardo R. F. |
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Snippet | Secondary V-recycling slag, an industrial waste containing high gallium is being dumped continuously, which causes the loss of gallium. Thus, the alkali fusion... |
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SubjectTerms | Alkali Fusion Gallium Recovery Secondary V-Recycling Slag |
Title | Recovery of Gallium from Secondary V-Recycling Slag by Alkali Fusion |
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