燃料化学学报2016，Vol.44Issue(7)：769-776,8.
高钙高铁煤灰熔融及黏温特性研究
Ash fusion and viscosity behavior of coal ash with high content of Fe and Ca
摘要
Abstract
Jinjitan coal and sand were respectively chosen as raw material and additive. Under the different proportion of additive, ash fusion and viscosity behavior of coal ash with high contents of Fe and Ca were studied. X-ray diffraction ( XRD ) , high-temperature stage microscope ( HTSM ) and scanning electron microscopy-energy dispersive spectrometry ( SEM-EDS ) were applied to investigate effect of mineral transformation on ash fusion and viscosity behavior of coal ash. The results show that ash fusion temperature decreases at first and then increases with the rising content of additive, and formation of low temperature eutectic augite is the main reason for the lower ash fusion temperature. The viscosity fluctuation is related to the formation of gehlenite, and the precipitation of iron-bearing minerals causes significant increase of viscosity. The temperature of critical viscosity (tcv) of coal ash slag drops dramatically and the slag type transforms from crystal slag to glass slag with addition of sand. Distribution of Fe and Ca shows obvious different in raw coal slag, but additive makes it become more uniform, which is in agreement with the viscosity curve. Moreover, the industrial results prove that sand is an effective additive to improve the viscosity behavior of coal ash with high content of Fe and Ca.关键词
高钙高铁煤/灰熔点/黏温特性/熔渣Key words
high-calciu-high-iron coal/ash fusion temperature/viscosity-temperature behavior/slag分类
化学化工引用本文复制引用
胡晓飞,郭庆华,刘霞,龚岩,于广锁..高钙高铁煤灰熔融及黏温特性研究[J].燃料化学学报,2016,44(7):769-776,8.基金项目
The project was supported by the National Natural Science Foundation of China (51406056), the Fundamental Research Funds for the Central Universities (222201514336,222201414030) and the Shanghai Pujiang Program (15PJD011).国家自然科学基金(51406056),中央高校基本科研业务费专项资金(222201514336,222201414030)和上海市浦江人才计划(15PJD011)资助 （51406056）
