2013•Applied Mechanics and MaterialsOpen access
Influence of Sewage Sludge Addition on Huainan Coal Ash Fusion Characteristics
Yao Jie, Zhong Bin Dong, Han Xu Li, Xing Ming Wang, Ming Jun Ji, Song Zhang
Open full text 7 citations
Abstract
The effects of sewage sludge addition on Huainan coal ash fusion characteristics were investigated by X-ray fluorescence (XRF) and X-ray diffraction (XRD). The experimental results showed that the ash chemical composition of Huainan coal ash was rich in SiO2and Al2O3, while the mass fraction CaO in sewage sludge was over 40%. Accordingly, the ash melting temperature of Huainan coal was higher than 1500°C while that of sewage sludge was lower than 1250 °C. The ash melting temperature of coal blending with sewage sludge fell with increasing mass fraction of sewage sludge in the range between 0 and 0.7. The aluminosilicate clay minerals with high fusion temperature contained in Huainan coal can be bond with CaO and iron oxides rich in sewage sludge forming low temperature eutectic system, it led to the reducing fusing temperature of Huainan coal mixing with sewage sludge.