燃料化学学报2018，Vol.46Issue(1)：8-14,7.
晋城粉煤煤灰不均匀熔融规律研究
Research on the uneven ash melting behavior of pulverized Jincheng coal
摘要
Abstract
According to the contradiction between ash melting theory and practice, an uneven melting theory was proposed. A typical Jincheng coal from Shanxi, China, was selected, which was ground into the particle size similar to the industrial use. It was separated into different density fractions through float and sink tests, and its chemical composition and mineral composition were analyzed with XRF and XRD, respectively. Ash fusion temperatures (AFTs) under light reducing atmosphere and the pressure-drop temperature(PDT) were tested. SEM-EDX was also employed to observe the melting behavior. It is found that the softening temperature of Jincheng coal is 1501 ℃, while that of its density fractions changes from 1292 ℃ to 1600 ℃. The sintering temperature changes from 833℃ to 943℃, while that of the raw coal ash was 885℃. The study of mechanism shows that the difference of melting and sintering behaviors is caused by the segregation of chemical composition in different density samples, mainly Al2 O3 , Fe2 O3 and SO3 .关键词
晋城煤/密度级别/灰熔融性/结渣Key words
Jincheng coal/density fraction/ash melting behavior/slagging分类
化学化工引用本文复制引用
张鹏启,杨琪琪,屠卡滨,王月伦,王祖威,刘林林,张洪..晋城粉煤煤灰不均匀熔融规律研究[J].燃料化学学报,2018,46(1):8-14,7.基金项目
The project was supported by the National Natural Science Foundation of China and Shanxi Low Carbon Coal Foundation(U1510106).国家自然科学基金—山西煤基低碳联合基金(U1510106)资助 （U1510106）
