燃料化学学报2017，Vol.45Issue(9)：1025-1034,10.
CaO含量对高钠煤灰熔融特性的影响
Effect of CaO content on the ash fusibility of high sodium coal
摘要
Abstract
In order to study effect of CaO content on the ash fusibility of high sodium coal,high sodium synthetic coal ash samples with different CaO content were prepared and ash fusion temperatures (AFTs) were measured.Thermodynamic database FactSage 7.0 was applied to simulate the ash melting process,and the mineral conversion was analyzed.The minerals' composition and surface morphology of synthetic coal ash samples were investigated by X-ray diffraction (XRD) and scanning electronic microscope (SEM).The results show that the AFTs drop first and rise later with the increase of CaO content.CaO addition influences the existence form and relative mass of both calcium-containing and sodium-containing minerals.At 1 000 ℃,the calcium-containing minerals transform from anorthite to andradite,wollastonite,gehlenite,rankinite and larnite in turn.The sodium-containing minerals transform from albite to nepheline.The results of binary phase diagram and analogous ternary phase diagram indicate that variation of liquidus temperature is consistent with the AFTs with increasing CaO content.When the CaO content is higher than 40％,the AFTs could be improved efficiently for the coal sample.关键词
灰熔融特性/高钠煤/CaO含量/热力学模拟/矿物变化Key words
ash fusibility/high sodium coal/CaO content/thermodynamic simulation/mineral conversion分类
化学化工引用本文复制引用
王东旭,祁超,王洋,李文艳,肖海平,康志忠..CaO含量对高钠煤灰熔融特性的影响[J].燃料化学学报,2017,45(9):1025-1034,10.基金项目
The project was supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (2015BAA04B02).国家科技支撑计划项目(2015BAA04B02)资助 （2015BAA04B02）
