CHARACTERIZATION, BENEFICIATION, AND REES EXTRACTION OF COAL BOTTOM ASH

Authors

  • Isyatun Rodliyah Center Testing for Mineral and Coal tekMIRA
  • Siti Rochani National Research and Innovation Agency
  • Sariman Sariman National Research and Innovation Agency
  • Suganal Suganal National Research and Innovation Agency
  • Datin Fatia Umar National Research and Innovation Agency
  • Pramusanto Pramusanto Universitas Islam Bandung

DOI:

https://doi.org/10.30556/imj.Vol25.No2.2022.1343

Keywords:

beneficiation, coal bottom ash, nitric acid leaching, rare earth elements

Abstract

Rare earth elements are strategic materials. The elements have critical roles in meeting the needs of raw material for producing the modern industrial products. Most of the REE minerals is available in the form of associated minerals. One of them is coal. In terms of obtaining an overview regarding the possibility of coal to be a source of REEs, a research was carried out by beneficiating the bottom ash of the coal using a shaking table and a magnetic separator, and was followed by extracting the REEs using the alkaline fusion and leaching them using the nitric acid. The results showed that the bottom ash of gasified coal from the Palimanan pilot plant contained cerium, lanthanum, samarium, neodymium, praseodymium, europium, gadolinium, dysprosium, and yttrium, with a total content of 77.85 ppm. Concentrating the REEs using the shaking table and the magnetic separator result in a recovery of 32.96% and 50.5%, respectively. Extracting the REEs by alkaline fusion using NaOH as flux was not promising  while leaching with nitric acid was able to extract the REEs with various percentage extraction values, and the highest extraction for Neodymium was 73.46% under conditions of 2M nitric acid leaching and heated at 80°C.

References

Franus, W., Wiatros-Motyka, M. M. and Wdowin, M. (2015) ‘Coal fly ash as a resource for rare earth elements’, Environmental Science and Pollution Research, 22(12), pp. 9464–9474. doi: 10.1007/s11356-015-4111-9.

Gielen, D. and Lyons, M. (2022) Critical materials for the energy transition: Rare earth elements. Abu Dhabi.

Harrar, H., Eterigho-Ikelegbe, O., Modiga, A. and Bada, S. (2022) ‘Mineralogy and distribution of rare earth elements in the Waterberg coalfield high ash coals’, Minerals Engineering, 183, p. 107611. doi: 10.1016/j.mineng.2022.107611.

Honaker, R. Q., Zhang, W. and Werner, J. (2019) ‘Acid leaching of rare earth elements from coal and coal ash: Implications for using fluidized bed combustion to assist in the recovery of critical materials’, Energy & Fuels, 33(7), pp. 5971–5980. doi: 10.1021/acs.energyfuels.9b00295.

Kashiwakura, S., Kumagai, Y., Kubo, H. and Wagatsuma, K. (2013) ‘Dissolution of rare earth elements from coal fly ash particles in a dilute H2SO4 Solvent’, Open Journal of Physical Chemistry, 03(02), pp. 69–75. doi: 10.4236/ojpc.2013.32009.

Mayfield, D. B. and Lewis, A. S. (2013) ‘Environmental review of coal ash as a resource for rare earth and strategic elements’, in 2013 World of Coal Ash (WOCA) Conference. Lexington: University of Kentucky Center for Applied Energy Research, p. 051.

Pan, J., Zhou, C., Liu, C., Tang, M., Cao, S., Hu, T., Ji, W., Luo, Y., Wen, M. and Zhang, N. (2018) ‘Modes of occurrence of rare earth elements in coal fly ash: A case study’, Energy & Fuels, 32(9), pp. 9738–9743. doi: 10.1021/acs.energyfuels.8b02052.

Pan, J., Hassas, B. V., Rezaee, M., Zhou, C. and Pisupati, S. V. (2021) ‘Recovery of rare earth elements from coal fly ash through sequential chemical roasting, water leaching, and acid leaching processes’, Journal of Cleaner Production, 284, p. 124725. doi: 10.1016/j.jclepro.2020.124725.

Park, S., Kim, M., Lim, Y., Yu, J., Chen, S., Woo, S. W., Yoon, S., Bae, S. and Kim, H. S. (2021) ‘Characterization of rare earth elements present in coal ash by sequential extraction’, Journal of Hazardous Materials, 402, p. 123760. doi: 10.1016/j.jhazmat.2020.123760.

Peelman, S., Sun, Z. H. I., Sietsma, J. and Yang, Y. (2014) ‘Leaching of rare earth elements: Past and present’, in 1st European Rare Earth Resources Conference. Milos: EURARE, pp. 446–456.

Peiravi, M., Ackah, L., Guru, R., Mohanty, M., Liu, J., Xu, B., Zhu, X. and Chen, L. (2017) ‘Chemical extraction of rare earth elements from coal ash’, Minerals & Metallurgical Processing, 34(4), pp. 170–177. doi: 10.19150/mmp.7856.

Perämäki, S. (2014) Method development for determination and recovery of rare earth elements from industrial fly ash. University of Jyväskylä.

Rao, K. A., Serajuddin, M., RamaDevi, G., Thakurta, S. G. and Sreenivas, T. (2021) ‘On the characterization and leaching of rare earths from a coal fly ash of Indian origin’, Separation Science and Technology, 56(3), pp. 541–557. doi: 10.1080/01496395.2020.1718705.

Stuckman, M., Lopano, C. and Tarka, T. (2020) ‘US Patent pending: Step-leaching process of rare earth elements from select coal combustion fly ashes using mild inorganic acids at ambient conditions’. United Stated.

Suganal, Umar, D. F. and Mamby, H. E. (2018) ‘Identifikasi keterdapatan unsur logam tanah jarang dalam abu batubara Pusat Listrik Tenaga Uap Ombilin, Sumatera Barat’, Jurnal Teknologi Mineral dan Batubara, 14(2), pp. 111–125. doi: 10.30556/jtmb.Vol14.No2.2018.395.

Tang, M., Zhou, C., Pan, J., Zhang, N., Liu, C., Cao, S., Hu, T. and Ji, W. (2019) ‘Study on extraction of rare earth elements from coal fly ash through alkali fusion – Acid leaching’, Minerals Engineering, 136, pp. 36–42. doi: 10.1016/j.mineng.2019.01.027.

Tang, M., Zhou, C., Zhang, N., Pan, J., Cao, S., Hu, T., Ji, W., Wen, Z. and Nie, T. (2022) ‘Extraction of rare earth elements from coal fly ash by alkali fusion–acid leaching: Mechanism analysis’, International Journal of Coal Preparation and Utilization, 42(3), pp. 536–555. doi: 10.1080/19392699.2019.1623206.

de Vasconcellos, M. E., da Rocha, S. M. R., Pedreira, W. R., da S. Queiroz, C. A. and Abrão, A. (2006) ‘Enrichment of yttrium from rare earth concentrate by ammonium carbonate leaching and peroxide precipitation’, Journal of Alloys and Compounds, 418(1–2), pp. 200–203. doi: 10.1016/j.jallcom.2005.10.076.

Wang, Z., Dai, S., Zou, J., French, D. and Graham, I. T. (2019) ‘Rare earth elements and yttrium in coal ash from the Luzhou power plant in Sichuan, Southwest China: Concentration, characterization and optimized extraction’, International Journal of Coal Geology, 203, pp. 1–14. doi: 10.1016/j.coal.2019.01.001.

Wills, B. A. (2006) Wills’ mineral processing technology. 7th Ed. Butterworth-Heinemann.

Woźniak, J. and Gurdziel, M. (2021) ‘Rare earth elements in deposited hard coal fly ash in Poland’, E3S Web of Conferences. Edited by S. Zhironkin et al., 278, p. 01016. doi: 10.1051/e3sconf/202127801016.

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Published

2022-12-19

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