地质学报（英文版）2009，Vol.83Issue(6)：1116-1121,6.
Character of the Si and Al Phases in Coal Gangue and Its Ash
Character of the Si and Al Phases in Coal Gangue and Its Ash
摘要
Abstract
Analysis of the Si and Al phases in coal gangue fuel and its ash is important for use of coal gangue ashes. A comprehensive study by theoretical and experimental analyses with differential thermal analysis, X-ray diffraction and Infrared Spectroscopy has been made in the present article to explore the diagram of the Si and Al phases in coal gangue fuel and its ashes. It is found that kaolinite and quartz are the main phases in coal gangue fuel. The ratio of moles Al_2O_3 to SiO_2 (i.e., Al_2O_(3(mole))/ SiO_(2(mole)) is usually no more than 0.5 in most coal gangue fuel and its ashes. The kaolinit at about 984°C releases a large quantity of SiO_2, which makes calcine coal gangue more active than coal gangue itself. The relationship between the ratio Al_2O_(3(mole))/SiO_(2(mole))and the components of coal gangue ash is analyzed, resulting in a formula to calculate the quantity of each phase. Applying the formula to the testing samples from an electric plant in north China supports the above conclusions.关键词
Si and Al phases/ Al_2O_(3(mole))/SiO_(2(mole))/ coal gangue fuel/ coal gangue ashKey words
Si and Al phases/ Al_2O_(3(mole))/SiO_(2(mole))/ coal gangue fuel/ coal gangue ash分类
地质学引用本文复制引用
WANG Lihua,ZHAO Pengda,LI Geng..Character of the Si and Al Phases in Coal Gangue and Its Ash[J].地质学报（英文版）,2009,83(6):1116-1121,6.基金项目
These research results are part of a key project carried out during 2006-2008 and were financially supported by the National Postdoct Foundation of China (No. 20070420417) and the Project of the Yunxi Corporation (2007-13A). The authors are grateful to Tang Yunhui for her proofreading the XRD results. （No. 20070420417）
