煤灰成分对煤灰熔融特性的影响  

INFLUENCE OF ASH COMPOSITION ON FUSIBILITY OF COAL ASH

作　　者：刘勇晶[1] 郭延红[1] 刘胜华[1] 

机构地区：[1]延安大学化工学院陕西省化学反应工程重点实验室,陕西延安716000

出　　处：《煤炭转化》2013年第1期68-71,共4页Coal Conversion

基　　金：延安大学研究生教育创新计划项目(2012SXTS11)

摘　　要：以神木西沟煤为煤样,研究了煤灰化学成分和灰熔融性的关系,考察了灰成分对煤灰熔融温度的影响,得出了提高煤灰熔点的最佳方法.实验结果表明,添加适量的氧化物会提高煤灰的熔融温度.要使灰软化温度超过1 350℃,SiO2的添加量至少4.0%,Al2O3的添加量至少2.0%,CaO的添加量至少2.0%.从工业生产实际出发,应考虑添加CaO,Al2O3或SiO2,即添加廉价的高岭土、石灰石、蒙脱土之类的添加剂,进而扩大煤的使用范围.ABSTRACT As Shenmu Xigou coal for sample, we studied the relationship between chemi- cal composition and ash fusibility, investigated the influence of the ash composition on the tem- perature of coal ash melting, and concluded the best approach to improve the ash fusion tempera- ture. The experimental results showed that the ash melting temperature was increased when adding appropriate amount of oxides. In order to make ST exceeding 1 350℃, the addition of SiO2 was at least 4.0%, the addition of Al2O3 was at least 2.0%, the addition of CaO was at least 2.0%. To take account of the conditions of industrial production, CaO, A1203, SiO2 or bualget kaolin, limestone, imvite should he added to enhance the ash fusion temperature in order to enlange the range of coal＇s application. KEY WORDS coal ash, fusion temperature, ash composition

关 键 词：煤灰 熔融温度 灰成分 

分 类 号：TQ533.2[化学工程—煤化学工程]