Conference Tools for 2022 TMS Annual Meeting & Exhibition

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About this Abstract
Meeting	2022 TMS Annual Meeting & Exhibition
Symposium	Rare Metal Extraction and Processing
Presentation Title	Rare Earth Elements Adsorption to Gypsum in Hydrometallurgical Processes
Author(s)	Farzaneh Sadri, Ahmad Ghahreman
On-Site Speaker (Planned)	Farzaneh Sadri
Abstract Scope	There has been an increasing demand on the REE supply in the last few decades and a special attention has been directed towards the extraction process of these elements. The impurity removal step is a key step in the processing circuit as it can determine the purity of the final product. Lime neutralization is deemed a preferred process due to its high efficiency in the removal of impurities and low reagent cost. However, some drawbacks such as coprecipitation of REE with calcium sulfate dihydrate (CaSO4 2H2O, CSD), which results in a significant REE loss, renders this process inefficient. In this study, the mechanism of REE co-precipitation with gypsum as well as the effect of two main impurities (Fe and Al), on the REE uptake from the pregnant leach solutions, during the impurity removal step are discussed.
Proceedings Inclusion?	Planned:
Keywords	Hydrometallurgy, Extraction and Processing, Environmental Effects

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