【摘要】 针对当前电厂主要燃用低质煤的问题,选择冷水江岩页煤灰作为基灰,分别配制MgO含量为4wt%,8wt%,12wt%,16wt%的灰样,然后依次将其置于SDAF 2000b灰熔点测试仪,测得灰样的变形温度DT、软化温度ST、半球温度HT和流动温度FT;将灰样散布在SiC质和铝质的耐火材料上,置于1250℃马弗炉煅烧20 h,冷却观察并作XRD分析.研究结果表明,基灰的熔点随MgO含量的递增先降后升,在5wt%左右灰熔点最低,结渣强度却逐步加强;SiC和铝质耐火材料对MgO的结渣性具有相近的适应性.更多还原

【Abstract】 According to the situation that most power plants fueled mainly with ravens,the Lengshui river coal ash was elected as base-ash simple,prepared ash-simple with MgO concentration of 4%,8%,12%,16% respectively,and then placed them into SDAF2000b ash-melting-point instrument successively to measure the DT,ST,HT,FT.Put the ash-simple uniformly and loosely on SiC corundum and high-aluminum based refractory boards and then sintered them in a muffle for 20 h under 1 250 ℃.XRD analyses showed that ash fusion point decreased with the content of MgO increased,and the lowest point appeared in the content of 5%.However,the strength of slagging enhanced,while MgO still increased,the ash fusion point rose.SiC refractory and Aluminum base refractory have the same slagging adaptability with the same content of MgO.更多还原