燃料化学学报2016，Vol.44Issue(9)：1034-1042,9.
煤灰熔融特性与灰成分之间关系的矿物变化研究
Relationship between coal ash fusibility and ash composition in terms of mineral changes
摘要
Abstract
Coal ash and synthetic ash samples were used to detect effect of different ash components on ash fusion temperatures (AFTs). Thermodynamic database FactSage 7. 0 was applied to simulate the melting process of ashes with different compositions, in order to provide theoretical basis for effect of ash components on ash fusibility. The reducing effect of Na2 O on AFTs is due to the replacement of anorthite by albite and nepheline. The increasing content of MgO can initially lower and then raise the AFTs. When MgO exceeds certain content, forsterite is generated and raise the AFTs. The raising effect of sulfur on AFTs is due to the replacement of diopside by forsterite and calcium sulfate. The increasing content of CaO can also initially lower and then raise the AFTs. When CaO exceeds certain level, Si migrates from minerals with low melting points to those with higher melting points, thus raising the AFTs. Na2 O is prior to CaO when being bound with silica-oxygen units to form minerals. The priority order of the oxides when being bound with CaO and silica-oxygen units is:Al2 O3>MgO> Fe2 O3 .关键词
灰熔融特性/矿物变化/热力学模拟Key words
ash fusibility/mineral conversion/thermodynamic simulation分类
化学化工引用本文复制引用
王洋,李慧,王东旭,董长青,陆强,李文艳..煤灰熔融特性与灰成分之间关系的矿物变化研究[J].燃料化学学报,2016,44(9):1034-1042,9.基金项目
The project was supported by National Nature Science Foundation of China (51276062), the Major State Basic Research Development Program of China (973 program,2015CB251501) and the Fundamental Research Funds for the Central Universities (2015ZZD02).国家自然科学基金(51276062),国家重点基础研究发展规划(973计划,2015CB251501)和中央高校基本科研业务费专项资金(2015ZZD02)项目资助 （51276062）
