从含镓浸钒渣中浸出镓的试验研究
EXPERIMENTAL STUDY ON EXTRACTING Ga WITH ALKALINE LEACHING FROM Ga-CONTAINING V-LEACHED RESIDUE
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摘要: 本研究作为含镓红热钒渣吹氧氧化后,同时压煮浸出钒和镓的基础研究,采用正交试验设计法,对已提取过钒的浸钒渣中的镓进行了碱浸实验。结果表明,渣中镓可以被浸出,镓浸出率(ηGa)主要随浸液碱浓度和浸出温度的变化而改变;浸出液碱(NaOH)水质量比为0.271、浸出温度为457K左右时ηGa最大,为65%左右。为减少浸液中铁和硅的含量,并能够同时浸出钒和镓,应提高碱浓度,控制合适的保温时间,浸出温度以475K为宜。Abstract: This research is regarded as one of the fundamental studies on extracting vanadium and gallium with autoclave leaching after oxygen blast oxidizing Ga-containing hot V-slag.The orthogonal test was adopted to carry out the experiment of extracting gallium with alkaline leaching from V-leached residue.The leaching percentage of Ga (ηGn.) changes mainly with alkali concentration of leaching solution and leaching temperature.Maximum ηGa about 65% can be obtained when wt.ratio of alkali (NaOH) to water in leaching solution is 0.271 and leaching temperature about 475K.In order to minimize iron and silicon and extract V and Ga in the leaching solution,alkali concentration should be raised,holding time should be kept in optimum range and desired leaching temperature is 475K.
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Key words:
- Ga-containing /
- V-leached residue /
- leaching gallium
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