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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Bibliographic Details
Published in6th International Symposium on High-Temperature Metallurgical Processing pp. 533 - 540
Main Authors Gao, Lei, Shi, Zhe, Zhang, Gui-fang
Format Book Chapter
LanguageEnglish
Published Cham Springer International Publishing
Subjects
Alkali Fusion
Gallium Recovery
Secondary V-Recycling Slag
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Summary: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%.
ISBN:9783319486031
3319486039
DOI:10.1007/978-3-319-48217-0_67