Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Recovery of Alumina from Sodium Hydroxide Leaching Solution by Precipitation with Hydrogen Peroxide

수산화나트륨 침출용액으로부터 과산화수소에 의한 침전으로 알루미나 회수

  • Nguyen, Thi Thuy Nhi (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University) ;
  • Lee, Man Seung (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University)
  • ;
  • 이만승 (목포대학교 신소재공학과)
  • Received : 2019.05.27
  • Accepted : 2019.07.05
  • Published : 2019.08.30
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Abstract

In order to recover pure alumina from balck dross, precipiatation experiments were done to the NaOH leaching solution of mechanically activated black dross. In this work, hydrogen peroxide was added to the synthic solution as a precipitating agent. Among some variables, the concentration of $H_2O_2$ and the volume ratio of $H_2O_2$ to solution showed a remarkable effect on the precipitation of aluminum hydroxide. At the optimum conditions, most of the aluminate was precipitated. Calcination of the aluminum hydroxide at $1200^{\circ}C$ led to the formation of ${\theta}$ and ${\alpha}$-alumina. The charactistics of the synthesized activated alumina was measured by XRD and EDS. The average particles size of the alumina was $3.73{\mu}m$.

블랙드로스로부터 순수한 알루미나를 회수하기 위해 기계적 처리한 블랙드로스의 수산화나트륨 침출용액을 대상으로 침전실험을 수행했다. 본 연구에서는 합성용액에 과산화수소를 침전제로 첨가했다. 실험변수중 과산화수소의 농도와 과산화수소와 용액의 부피비가 수산화알루미늄의 침전에 큰 영향을 미쳤다. 최적 조건에서 용액중 알루미네이트이온이 대부분 침전되었다. 수산화알루미늄을 $1200^{\circ}C$에서 하소시켜 ${\theta}$와 ${\alpha}$상을 지닌 알루미나를 얻었고 제조한 알루미나의 특성은 XRD와 EDS로 측정했다. 알루미나 입자의 평균 입경은 $3.73{\mu}m$ 이었다.

Keywords

References

  1. Manfredi, O., Wuth, W., and Bohlinger, I., 1997 : Characterizing the physical and chemical properties of aluminum dross, pp.48-51.
  2. Seyed Ghasemi, S. M. and Azizi, A., 2017 : Alkaline leaching of lead and zinc by sodium hydroxide: Kinetics modeling, Journal of Materials Research and Technology, pp.1-8.
  3. Nguyen, T. T. N., Lee, M. S., and Nguyen, T. H., 2019 : Ball milling treatment of black dross for selective dissolution of alumina in sodium hydroxide leaching - submitted, 6(4), pp.29-29. https://doi.org/10.3390/pr6040029
  4. Nguyen, T. T. N. and Lee, M. S., 2018 : Purification of the sodium hydroxide leaching solution of black dross by removal of silicate(iv) with polyacrylamide (PAM). Submitted
  5. Zhi, W., Liu, Y., and Juan, Z., 2010 : Adjustment on gibbsite and boehmite co-precipitation from supersaturated sodium aluminate solutions, Transactions of Nonferrous Metals Society of China, 20(3), pp.521-527. https://doi.org/10.1016/S1003-6326(09)60172-2
  6. Technical, A., Wefers, K., and Laboratories, A.: Oxides and hydroxides of aluminum.
  7. Matori, K. A., Wah, L. C., Hashim, M., and Ismail, I., 2012 : Phase transformations of ${\alpha}$-alumina made from waste aluminum via a precipitation technique, 2, pp.16812-16821.
  8. Barakat, M. A. and Farghly, F. E., 2005 : Removing al and regenerating caustic soda from the spent washing liquor of al etching, pp.35-38.
  9. El-katatn, E. A., Halaw, S. A., Mohamed, M. A., and Zaki, M. I., 1998: A novelsy nthesis of high-area alumina via $H_2O_2$-precipitated boehmite from sodium aluminate solutions, pp.320-328.
  10. Sahu, N. K., Sarangi, C. K., Dash, B., Tripathy, B. C., and Satpathy, B. K., 2015 : Role of hydrazine and hydrogen peroxide in aluminium hydroxide precipitation from sodium aluminate solution, 25, pp.615-621. https://doi.org/10.1016/S1003-6326(15)63644-5
  11. Barakat, M. A. and Farghly, F. E., 2005 : Removing al and regenerating caustic soda from the spent washing liquor of al etching, pp.35-38.
  12. Kubaschewski, O. and Alcock, C. B., 1979 : Metallurgical Thermochemistry, 5th Ed.
  13. Abramoff, M. D., Hospitals, I., Magalhaes, P. J., and Abramoff, M.: Image processing with imageJ.