Effects and Behaviors of Heavy Metals(Cd, Cr, Cu, Pb) in Cement Clinker Reaction

시멘트 클린커 반응에서 중금속(Cd, Cr, Cu, Pb)의 거동과 영향

  • Hong, Seong-Su (Department of Chemical Engineering, College of Engineering, Hoseo University) ;
  • Lee, Taeck-Hong (Department of Chemical Engineering, College of Engineering, Hoseo University) ;
  • Lim, Gye-Gyu (Department of Chemical Engineering, College of Engineering, Hoseo University) ;
  • Oh, Hea-Kab (Department of Chemical Engineering, College of Engineering, Hoseo University) ;
  • Lee, Bong-Han (Ssangyong Research Center)
  • 홍성수 (호서대학교 공과대학 제3공학부) ;
  • 이택홍 (호서대학교 공과대학 제3공학부) ;
  • 임계규 (호서대학교 공과대학 제3공학부) ;
  • 오희갑 (호서대학교 공과대학 제3공학부) ;
  • 이봉한 (쌍용중앙연구소)
  • Received : 1999.02.01
  • Accepted : 1999.06.05
  • Published : 1999.08.10

Abstract

The effects and behaviors of heavy metals incoming from industrial by-products were investigated in cement clinker reaction. The raw meal containing 500 ppm of heavy metal ion such as Cu, Cd, Cr, and Pb was calcined at $1450^{\circ}C$ for 30 minutes. Burnability index, fixation concentration of heavy metals in clinker, and apportionment ratio were analyzed. Pb had a minimum fixation concentration of under 5% and Cr had a maximum over 85%. The burnability of Cr containing clinker was lower than that of others as the result of higher value of 3.41% of free lime after calcination at $1450^{\circ}C$. Cu, Cd, and Pb had not any significant effects on the clinker reactitivity. The volatility of heavy metals produced lots of macropores and micropores in clinker and minerals. Cd and Cr were the major apportionments in alite and belite and Cu in interstitial phase. Pb was existed under the detection limit of EDAX analysis due to its higher volatility.

Acknowledgement

Grant : '97년도 공업기반기술개발사업

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