科研之友
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摘要
In this study, a systematic study on the characterization of two kinds of steelmaking sludges, oil-containing sludge (Sludge-I) and alkali-containing sludge (Sludge-II), were carried out by using X-ray fluorescence spectrometry (XRF), leaching toxicity test, X-ray diffraction (XRD), scanning electron microscopy (SEM), TG-DSC, and proximate analysis, and their potential of being recycled as alternative fuel and raw materials in cement production was also discussed. Results showed that Al2O3, Fe2O3, SiO2, and CaO were the major compositions in calcinated Sludge-I and Sludge-II after being calcinated at 850 degrees C. The calorific values of Sludge-I and Sludge-II were 8513 Jg(-1) and 3299 Jg(-1) and the combustible contents were 62.22% and 34.03%, respectively. The content of alkalis in Sludge-I was lower than that in Sludge-II and both of these values were within the scope of requirement for cement. Considering the similar compositions as cement raw materials, high calorific values and combustible contents, both of the two sludges had potential of being recycled as alternative fuel and raw materials in cement production. But the higher heat and lower alkali content in Sludge-I made its potential better. The research would be helpful to understand the composition and thermal behavior of the sludges and to further develop more ideal utilization methods.
- 出版日期2016-7
- 单位同济大学
