Leaching Neodymium from Magnetic Coal Fly Ash using Acetic Acid Solvent

haries handoyo, I Made Bendiyasa, Agus Prasetya

Abstract


Neodymium (Nd) has been known as a vital component in the modern industry such as for very strong permanent magnets (NdFeB magnet). Some countries are starting to look for alternative sources of Nd such as coal fly ash (CFA), which is the waste from coal combustion. This study aims to look at the potential for Nd extraction from CFA using acetic acid at atmospheric pressure. The effect of CH3COOH concentrations (0,1-1,0 N), and leaching temperature (26-60 oC) was investigated. The experiment was carried out under a constant agitation speed (400 rpm), S/L ratio (3,75 % (W/V)) and CFA particle size (-400 mesh). The highest leaching eficiencies (72%) were achieved for concentration of acetic acid 0,5 N at 60 oC. The leaching kinetics results showed that it best fits the shrinking core model: [t.kap=1-3(1-XB) 2/3 +2(1-XB)] ensuring the overall leaching process is controlled by difussion ash layer. The activation energy determined from the experimental study was of 15,38 kJ/mol.

Keywords


neodymium; pelindian; magnetik CFA; asam asetat

References


Anonim. Laporan kinerja 2017 Dirjen Minerba, Kementrian ESDM. 2018.

Anonim. Peraturan Presiden RI Nomor 22 Tahun 2017 Tentang Rencana Umum Energi Nasional. 2017.

Behera S.S. dan P.K. Parhi. Leaching kinetics study of neodymium from the scrap magnet using acetic acid. Separation and Purification Technology, 60 (2016): 59-66.

Belkin, H E., Susan J.T., James C.H., J.D. Stucker, J.M.K. O'Keefe. Geochemistry and petrology of selected coal samples from Sumatra, Kalimantan, Sulawesi, and Papua, Indonesia. International Journal of Coal Geology, 77 (2009): 260-268.

Blisset, R.S., N. Smalley, N.A. Rowson. An Investigation into six coal fly ashes from the united kingdom and Poland to evaluate rare earth element content. Fuel 119 (2014): 236-239.

Croat J.J. Rapidly solidified neodymium-Iron-Boron permanent magnets. Woodhead Publishing: Duxford. 2018: p.5

Dai S., Yaofa J., Colin R.W., Landing G., Vladimir V.S., Huidong L., Dao Z., Xibo W., Yuzhuang S., Juanhua Z., Deyi R., Mineralogical and geochemical compositions of the coal in the Guanbanwusu Mine, Inner Mongolia, China: Further evidence for the existence of an Al (Ga and REE) ore deposit in the Jungar Coalfield. International Journal of Coal Geology, 98 (2012): 10-40.

Eskenazy, G.M. Rare earth elements in a sampled coal from the Pirin deposit, Bulgaria. International Journal of Coal Geology, 7(1987): 301-314.

Gergoric M., C. Ravaux, B.M. Steenari, F. Espegren, T. Retegan. Leaching and Recovery of Rare-Earth Elements from Neodymium Magnet Waste Using Organic Acids. Metal, 8 (2018); 1-17

Gustiana, H. S. (2018). Pelindian Nikel dari Nikel Laterit Pomalaa Menggunakan Asam Asetat. Yogyakarta: Universitas Gadjah Mada.

Jha A.R. Rare earth materials, properties and aplications. CRC Press: Boca Raton. 2014

Levenspiel, O. Chemical reaction engineering 3rd ed. John wiley & sons: New york. 1999

Seredin, V. V. Rare earth element-bearing coals from the Russian Far East deposits. International Journal of Coal Geology, 30 (1996):101-129.

Voncken J.H.L. The Rare earth elements an Introduction. Springer. 2016: 116.

Yagi, S., and Kunii, D., 5th Symposium (International) on Combustion, Reinhold, New York, (1955), 231.

Yagi, S., and Kunii, D., Chem. Eng. Sci., 16, (1961) 364, 372, 380.

Zanonato, P.L., Bernardo, P., Bismondo, A., Rao, L., Choppin, G.R. Thermodynamic Studies of the Complexation between Neodymium and Acetate at Elevated Temperatures. Journal of Solution Chemistry, 30 (2001): 1-18.

Zepf V. Rare earth elements, a new approach to the nexus of supply, demand and use: exemplified along the use of neodymium in permanent magnets. University of Augsburg, Germany, Doctoral Thesis, 2013.




DOI: https://doi.org/10.31315/e.v16i2.3027

Refbacks

  • There are currently no refbacks.

Article Metrics

Metrics Loading ...

Metrics powered by PLOS ALM


Eksergi p-ISSN  1410-394X, e-ISSN 2460-8203,  is published by "Prodi Teknik Kimia UPN Veteran Yogyakarta".

Contact  Jl. SWK 104 (Lingkar Utara) Condong catur Sleman Yogyakarta

 

 Creative Commons License

Eksergi by http://jurnal.upnyk.ac.id/index.php/eksergi/index/ is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

 

 

Lihat Statistik Jurnal Kami