DOI QR코드

DOI QR Code

The Effect of Al2O3 upon Firing Range of Clay-EAF Dust System Body

Clay-EAF Dust계 소지의 소결온도 범위에 미치는 Al2O3의 영향

  • 김광수 (경기대학교 첨단산업공학부 신소재공학전공) ;
  • 강승구 (경기대학교 첨단산업공학부 신소재공학전공) ;
  • 이기강 (경기대학교 첨단산업공학부 신소재공학전공) ;
  • 김유택 (경기대학교 첨단산업공학부 신소재공학전공) ;
  • 김영진 (경기대학교 첨단산업공학부 신소재공학전공) ;
  • 김정환 (경기대학교 첨단산업공학부 신소재공학전공)
  • Published : 2003.05.01

Abstract

The effects of $Al_2$O$_3$ addition upon the sintering range of clay-EAF dust (the specified wastes produced from steel making process) system body which would be used as a constructing bricks were investigated. The slope of apparent density to sintering temperature decreased for Clay-dust body containing 5~15 wt% A1203 sintered at 1200-125$0^{\circ}C$, and the absorption(%) of specimen sintered above 125$0^{\circ}C$ decreased due to the formation of open pores produced by pore bloating. For the specimen without any $Al_2$O$_3$ addition sintered at 1275$^{\circ}C$, the major phase was cristobalite, the small amount of mullite (3Al$_2$O$_3$ 2SiO$_2$) formed and the hematite (Fe$_2$O$_3$) remained. In the Clay-dust system body containing $Al_2$O$_3$ 15 wt%, however, the cristobalite disappeared and the major phase was mullite. Also the part of $Al_2$O$_3$ reacted with hematite to form hercynite (FeAl$_2$O$_4$). From the these results, addition of $Al_2$O$_3$ to Clay-dust system body enlarges a sintering range; decreasing an apparent density and absorption slop to sintering temperature owing to consumption of liquid phase SiO$_2$ at higher temperature and gas-forming component Fe$_2$O$_3$ at reduced atmosphere which would decrease an amount of liquid formed and increase the viscosity of the liquid produced during the sintering process.

References

  1. J. Kor. Inst. Met. and Mater. v.36 no.3 The Reduction Rate of Metal Oxide Contained in Electric Arc Furnace Dust by Solid Carbon depending on Basicity B.K.Park;K.H.Lee;Y.H.Kim;H.K.Shin
  2. J. Kor. Inst. Met. and Mater. v.35 no.9 The Behaviors of Zinc, Lead and Chlorine in the Pyromatallugical Process for Electric Arc Furnace Steel Dust Y.H.Lee;J.H.Lee
  3. J. Kor. Ceram. Soc. v.36 no.7 A Study on the Stabilization/Solidification Process Using Blast Furnace Slag S.K.Kang;W.K.Bang;S.H.Lee;C.E.Kim
  4. J. Kor. Ceram. Soc. v.39 no.8 Stabilization Behavior of Heavy Metal in the EAF Dust-clay Body Mixtures at Various Sintering Conditions Y.J.Kwon;Y.T.Kim;K.G.Lee;Y.J.Kim;S.G.Kang;J.H.Kim https://doi.org/10.4191/KCERS.2002.39.8.728
  5. J. Kor. Ceram. Soc. v.39 no.7 Properties of Heavy Metal Adsorption of Clay Minerals T.H.Um;Y.T.Kim;K.G.Lee;Y.J.Kim;S.G.Kang;J.H.Kim https://doi.org/10.4191/KCERS.2002.39.7.663
  6. J. Kor. Ceram. Soc. v.38 no.9 Lightweight Aggregate Bloating Mechanism of Clay/Incinerated Ash/Additive System Y.J.Kwon;Y.T.Kim;K.G.Lee;Y.J.Kim;S.G.Kang;J.H.Kim;M.S.Park
  7. J. Kor. Solid Waste Eng. Soc. v.16 no.2 A Study on the Recycling of EAF Dust using Glassification in the System of Fe₂O₃-ZnO-SiO₂ B.I.Kim;B.S.Hyun;W.H.Kang
  8. J. Kor. Solid Waste Eng. Soc. v.13 no.5 Vitrification Characteristics of the Residues from Incineration of Hazardous Industrial Wastes with Fluxing Agents K.S.Eom;T.K.Kim;K.H.Kim;M.R.Kim;J.G.Jang;J.K.Lee
  9. J. Kor. Solid Waste Eng. Soc. v.14 no.2 Physio-chemical Characteristics of Wastes for Melting Incineration H.S.Park;H.S.Chung;B.K.Choi