Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation of Spherical Granules of Dolomite Kiln Dust as Gas Adsorbent

  • Choi, Young-Hoon (Dept. of R&D Team, Daesung Mining Development Inc.) ;
  • Huh, Jae-Hoon (Dept. of R&D Team, Hanil Cement Corp.) ;
  • Lee, Shin-Haeng (Dept. of R&D Team, Daesung Mining Development Inc.) ;
  • Han, Choon (Dept. of Chemical Engineering, Kwangwoon University) ;
  • Ahn, Ji-Whan (Mineral Processing Division, Korea Institute of Geosciences and Mineral Resources)
  • Received : 2015.12.11
  • Accepted : 2016.01.19
  • Published : 2016.01.31
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Abstract

It is highlighted that increasing the adsorbent surface area on volumetric basis is very important in providing an easy access for gas molecules. Fine particles around $3{\mu}m$ of soft-burned dolomite kiln dust (SB-DKD) were hydrated to wet slurry samples by ball mill process and then placed in a chamber to use spray dryer method. Spherical granules with particle size distribution of $50{\sim}60{\mu}m$ were prepared under the experimental condition with or without addition of a pore-forming agent. The relationship between bead size of the pore-forming agent and size of SB-DKD particles is the most significant factor in preparation of spherical granules with a high porosity. Whereas addition of smaller beads than SB-DKD resulted in almost no change in the surface porosity of spherical granules, addition of larger beads than SB-DKD contributed to obtaining of the particles with both 15 times larger average pore volume and 1 order of magnitude larger porosity. It is considered that spherical granules with improved $N_2$ gas adsorption ability may also be utilized for other atmospheric gas adsorption.

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References

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