Abstract
This study presents the recovery of cerium (Ce) from Khuren Khad ore by using the hydrometallurgical process. Several methods of leaching and precipitation were employed to investigate the recovery efficiency of Ce from the ore. According to the result, it is 4.8% of Ce contained in this ore sample. The best result of this study reveals that 100% Ce leaching efficiency can be obtained under leaching conditions of 6N HCl at a temperature of 70° C and 5g/50mL solid/liquid ratio and 3h. Further, 99.60% precipitation recovery of Ce was achieved with NaHCO3 at an interval of 24 hours. After leaching and precipitation, the concentration of Ce was enriched from 4.8% of Khuren Khad ore to 33.09% of precipitation product.
Highlights
This study presents the recovery of cerium (Ce) from Khuren Khad ore by using the hydrometallurgical process
Precipitation The optimal leaching solution was subjected to precipitation method to recover Ce dissolved in the solution by adding precipitation agents, including NH4HCO3, NaHCO3, Na2SO4, and K2SO4 in a 1:1 ratio. 20 mL of the leaching solution was treated with the precipitation agents, and the reaction was allowed for 24 hrs at room temperature
The obtained product at various time intervals of precipitation was analysed by inductively coupled plasma-atomic emission spectrometry (ICP-AES), and the precipitation efficiency was calculated according to Eq (2)
Summary
This study presents the recovery of cerium (Ce) from Khuren Khad ore by using the hydrometallurgical process. Several methods of leaching and precipitation were employed to investigate the recovery efficiency of Ce from the ore. Many studies have written about leaching recovery of REE containing materials by thermal and chemical methods [6,7,8,9,10]. The main objective of this study is to develop a sustainable and coherent process for the recovery of Ce from Khuren Khad ore. The Khuren Khad ore was obtained from the Mushgia Khudag deposit in southern Mongolia, which is one of the highgrade ores of REEs in the Mushgia Khudag deposit, Mongolia
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