Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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A study on the manufacture of the ZnO by the wet method from the EAF dust

제강분진을 이용한 ZnO분말의 제조에 관한 연구

  • Jeong, Rae-Youn (Dept. of Chemical Engineering, Seoul National University of Science and Technology) ;
  • Lee, Jin-Hui (Dept. of Chemical Engineering, Seoul National University of Science and Technology)
  • 정래윤 (서울과학기술대학교 화학공학과) ;
  • 이진휘 (서울과학기술대학교 화학공학과)
  • Received : 2011.06.13
  • Accepted : 2011.06.22
  • Published : 2011.06.30
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Abstract

The processes for the preparation of ZnO powder by using EAF(electric arc furnace)dust was studied by wetting method which are divided to two steps, carried out of the elution processes by various concentrations of sulfuric acid is reacted with EAF dust as the former, and the latter were performed by a number of specified processes, which are leaching process depends on various pH, cementation, ozone and heat treatment processes etc. Experimental results showed that the appropriate pH range is pH7.5~8.0 and the resulting zinc content is range of 37~38%, the residual quantities of the heavy metals are less than 3ppm individually by cementation process except Mn, even though the Mn metal could not be removed by cementation process but was removed up to 0.2ppm by the ozone process from 70ppm initially. Finally, 80.2% of ZnO was obtained by the heat treatment at $500^{\circ}C$.

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References

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