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Received September 9, 2009
Accepted November 4, 2009
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Correlation between the ash composition and melting temperature of waste incineration residue
Department of Environmental Engineering, Pukyong National University, 599-1, Daeyeon-3dong, Nam-gu, Busan 608-737, Korea 1Department of Environmental Engineering, Dongseo University, San 69-1, Churye-2dong, Sasang-gu, Busan 617-716, Korea 2Byucksan Engineering & Construction Co., Ltd., 13-25, Yoido-dong, Youngdeungpo-gu, Seoul 150-739, Korea
leejk@pknu.ac.kr
Korean Journal of Chemical Engineering, March 2010, 27(3), 1028-1034(7), 10.1007/s11814-010-0156-0
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Abstract
The correlation between the ash composition of various incinerated waste residues and their melting temperatures was examined by using their chemical composition parameters. There was a low correlation between the melting temperatures and the acidic oxide content in the ashes. However, the composition parameters derived from the basic oxides showed a good correlation with the ash melting temperature. The composition parameter, P7, which is defined as the ratio of basic oxides (CaO+MgO+K2O+Na2O) to acidic oxides (SiO2+Al2O3+Fe2O3), showed a strong_x000D_
correlation with the ash melting temperature. By fitting the composition parameter to the experimental data, the correlation equation for the half fluid temperature (HFT) was found to be HFT=426.77P7^(2)-736.76P(7)+1592.3 with a correlation coefficient of 0.91. The correlation equation could be used to predict the melting temperatures of various waste incineration residues. The relative error between the measured and predicted melting temperature was approximately 5%. Overall, these parameters and correlation equations can be used to predict and reduce the melting temperature of incineration residues.
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