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Study on separating iron and rare earth by ammonium jarosite method from acid leach liquor of NdFeB secondary waste
Received date: 2020-01-18
Online published: 2020-06-12
The separation of iron and rare earth from sulfuric acid leach liquor of NdFeB secondary waste by ammonium jarosite method was studied.The effects of reaction time,reaction temperature,pH and dripping speed of alkali on recovery rate of Fe and loss rate of rare earth were investigated. Result showed that the longer the reaction time,the higher the temper-ature and the higher the pH are,the higher the recovery rate of Fe is.And the dripping speed of alkali had a greater impact on the loss rate of rare earth.The recovery rate of Fe reached 96.67% and the loss rate of rare earth was 18.74% which was rela-tively small at the reaction time of 16 h,the reaction temperature of 80 ℃,the pH of 2.0~2.5 and the dripping speed of alkali of 7.2 mL/min.It showed that Fe and rare earth can be separated effectively by ammonium jarosite method.By means of XRD and SEM,it is proved that the recovered iron precipitate is ammonium jarosite with inclined hexagonal shape.
Mian Wu , Lanmei Zou , Shaoming Yu . Study on separating iron and rare earth by ammonium jarosite method from acid leach liquor of NdFeB secondary waste[J]. Inorganic Chemicals Industry, 2020 , 52(6) : 68 -71 . DOI: 10.11962/1006-4990.2019-0428
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