Thermal treatment for the separation of phosphate and recovery of rare earth metals (REMs) from Korean monazite

Kumari, Archana and Panda, Rekha and Jha, Manis K and Lee, Jin-Young and Kumar, J Rajesh and Kumar, Vinay (2015) Thermal treatment for the separation of phosphate and recovery of rare earth metals (REMs) from Korean monazite. Journal of Industrial and Engineering Chemistry, 21 (IF-2.145). pp. 696-703.

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Abstract

Systematic study for thermal decomposition of monazite to remove phosphate as a valuable product using Na2CO3 and NaOH roasting processes to validate the TG/DTA studies is reported here. Monazite in 1:1 wt. ratio with Na2CO3 and NaOH requires a temperature of 900 8C and 400 8C, respectively, for 120 min in order to achieve complete conversion of rare earth phosphate into its oxides. The roasted mass was washed, dried and leached in 6 M HCl for 2 h, pulp density 30 g/L at 80 8C which results in >90% REMs recovery. Leach liquor generated will be further processed by solvent extraction and precipitation processes.

Item Type:Article
Official URL/DOI:http://dx.doi.org/10.1016/j.jiec.2014.03.039
Uncontrolled Keywords:Korean monazite, Roasting,Phosphorus, TG/DTA, Rare earth metals (REMs), HCl
Divisions:Metal Extraction and Forming
ID Code:6903
Deposited By:Ms. Rekha Panda
Deposited On:16 Apr 2014 16:39
Last Modified:12 Jun 2015 14:55
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