摘要
煤的灰熔融特性是评价用煤洁净有效转化的重要指数,直接影响煤的气化.主要通过添加煤矸石(CG)的方式,改变两种低灰熔点煤润北煤(RBC)和俄矿煤(EKC)的硅铝比(SiO_(2)/Al_(2)O_(3)),进而探索影响低灰熔点煤灰熔融特性的原理.通过灰熔点测定仪的测试结果和FactSage热力学软件的计算结果分析发现,随着CG灰(CGA)含量的增多,低灰熔点煤RBC和EKC的灰熔点逐渐升高.由于CGA与RBC灰混合后,在高温条件下会产生较多含量的SiO_(2)和Al_(2)O_(3),因此,RBC的灰熔融温度随硅铝比S/A的降低而增加,S/A值达到1.83时RBC的灰熔点升为1381℃.而EKC灰中添加CGA后在高温条件下发生反应生成高熔点的白榴石和钾霞石,故EKC的灰熔点也随着S/A的降低而增加,当S/A为1.80时,EKC的灰熔点达到1376℃.
The fusion characteristics of coal ash are crucial for evaluating the clean and efficient conversion of coal,directly affecting its gasification process.This study explores how the addition of coal gangue(CG)can alter the silica-to-alumina ratio(SiO_(2)/Al_(2)O_(3))in two low-ash-melting-point coals,Runbei Coal(RBC)and Ekuang Coal(EKC),thereby affecting their ash fusion characteristics.Using an ash fusion temperature measurement device and FactSage thermodynamic software,the results indicate that as the content of CG ash(CGA)increases,the ash fusion point of RBC and EKC gradually rises.When CGA is mixed with RBC ash,a greater quantity of SiO_(2)and Al_(2)O_(3)is produced under high temperatures,causing the ash fusion temperature to increase as the silica-to-alumina ratio(S/A)decreases.The RBC ash fusion temperature rises to 1381°C when the S/A value is 1.83.Similarly,when CGA is added to EKC ash,high-melting-point Leucite and Kaliophilite are generated under high temperatures,causing the ash fusion point to increase with a decreasing S/A ratio.The EKC ash fusion point reaches 1376°C when the S/A ratio is 1.80.
作者
徐美玲
钟梦洁
李风海
樊红莉
XU Mei-ling;ZHONG Meng-jie;LI Feng-hai;FAN Hong-li(School of Chemistry and Chemical Engineering,Heze University,Heze Shandong 274015,China)
出处
《菏泽学院学报》
2024年第2期18-24,共7页
Journal of Heze University
基金
山东省自然科学基金面上项目(ZR2021MB011)
国家自然科学基金面上项目(21875059)
中国博士后科学基金面上项目(2021M691983)
山东省博士后创新项目(202103069)
江苏省博士后科研资助项目(2021K580C)
菏泽学院博士基金(XY20BS04)。
