Circulation of Sodium Sulfate Solution Produced During NiMH Battery Waste Processing

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

5 Sitaatiot (Scopus)
70 Lataukset (Pure)

Abstrakti

Hydrometallurgical recovery of rare earth elements (REE) from NiMH battery waste can be performed using sulfuric acid leaching followed by selective precipitation as double salt (REENa(SO4)2·H2O) by adding Na2SO4 as a precipitating agent. The formed double salts can then be further converted with NaOH solution to form REE hydroxides. However, present literature has paid little attention to how to minimize the consumption of reagents in this recovery process. In the current study, a process model was built using HSC Sim software, and metamodeling of the simulated flowsheet was conducted with the design of experiments (DOE), after which the basic functionality of the flowsheet was verified by experimental work, starting from sulfuric acid leaching of spent batteries. As the process is based on chemical circulation internally in the process, the objective was to investigate the accumulation of the elements in solution, specifically Na+, K+, SO42− ions and impurities liberated in the NaOH conversion step. It was found out that metamodeling could be utilized in obtaining first estimate of the process behavior, prior to any experiments. Flowsheet functionality with circulated solution was confirmed, obtaining at best 96.9% La recovery.
AlkuperäiskieliEnglanti
JulkaisuMining, Metallurgy & Exploration
Varhainen verkossa julkaisun päivämäärä2019
DOI - pysyväislinkit
TilaJulkaistu - 12 kesäkuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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  • Projektit

    BATCIRCLE: Finland-based Circular Ecosystem of Battery Metals

    Lundström, M., Peng, C., Chernyaev, A., Kalliomäki, T., Liu, F., Porvali, A., Wilson, B., Khalid, M. K., Hu, F., Shukla, S., Ke, P., Wang, Z., Revitzer, H., Rinne, M., Seisko, S., Partinen, J. & Palomäki, H.

    01/01/201930/04/2021

    Projekti: Business Finland: Other research funding

    MINEWEEE

    Agarwal, V., Liu, F., Lundström, M., Aaltonen, M., Revitzer, H. & Mohanty Uditsurya, U.

    17/01/201731/12/2019

    Projekti: Business Finland: Other research funding

    CMEco: Circular Metal Ecosystem - CMEco

    Aji, A., Kalliomäki, T., Seisko, S., Leikola, M., Jafari, S., Peng, C., Agarwal, V., Elomaa, H., Hamuyuni, J., Khalid, M. K., Lundström, M., Halli, P., Sinisalo, P., Wilson, B., Revitzer, H., Partinen, J. & Wang, Z.

    01/01/201731/12/2019

    Projekti: Business Finland: Other research funding

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