化工学报2012，Vol.63Issue(1)：9-17,9.DOI:10.3969/j.issn.0438-1157.2012.01.002
榆林煤灰熔融特性及黏温特性
Ash fusion and viscosity-temperature characteristics of Yulin coal
摘要
Abstract
There exists blocking in real gasification process of Yulin coal in whose ash the content of calcium and sulfur is high. The large fluctuation of viscosity-temperature curve measured in laboratory can be observed. FactSage 6. 2 software was used to calculate ternary phase equilibrium and phase change rules during ash melting of Yulin coal under different ranges of high temperature. Based on these results and XRD measurement, the characteristics of ash fusion and viscosity-temperature changes caused by the addition of SiO2 as well as the reason of viscosity fluctuation were analyzed. The results show that the fusion temperature of Yulin coal ash decreased initially then increased with the increasing values of SiO2/ Al2O3 (S/A) and acid/base (A/B). There is a strong correlation between the formation of gehlenite and viscosity fluctuation within certain temperature ranges. The viscosity fluctuation of Yulin coal ash can be alleviated by adding appropriate SiO2 (to the point when S/A = 2. 48), its amount can be obtained from binary phase diagrams calculated by FactSage. The numerical calculation results are in agreement with the experimental data, which proves that the chemical thermodynamic equilibrium analysis method is suitable for investigating the characteristics of ash melting.关键词
榆林煤/黏温特性/熔融特性Key words
Yulin coal/viscosity-temperature characteristic/fusion characteristic分类
化学化工引用本文复制引用
李德侠,周志杰,郭庆华,于广锁..榆林煤灰熔融特性及黏温特性[J].化工学报,2012,63(1):9-17,9.基金项目
国家重点基础研究发展计划项目(2010CB227004) （2010CB227004）
国家自然科学基金项目(21006026,20876048). （21006026,20876048）
