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Vojnotehnički glasnik
2018, vol. 66, iss. 4, pp. 757-770
article language: English
document type: Original Paper
published on: 12/09/2018
doi: 10.5937/vojtehg66-17177
Creative Commons License 4.0
Leaching of rare earth elements with sulfuric acid from bastnasite ores
RWTH Aachen University, IME Process Metallurgy and Metal Recycling, Aachen, Federal Republic of Germany



The research leading to these results has received funding from the European Communitys Seventh Framework Programme (Call identifier FP7-NMP-2012-LARGE-6) under grant agreement n°309373


Dissolution of rare earth elements from bastnasite ores was studied using sulfuric acid at the atmospheric pressure. The one step strategy with sulfuric acid was studied further and the results showed that filtering difficulties do not happen for the chosen parameter combinations. Furthermore, the best parameter combinations were those with low temperatures and low acid concentrations. All in all, direct leaching is a simple process that uses the cheapest acid on the market and offers good leaching recoveries. Attention should be given to the formation of gel, especially when taking the process to the large scale, and the subsequent elimination of Ca from the leachate.



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