关键词: 拉曼光谱;助熔剂;灰渣结构;特征峰;XRD

Abstract: In a reducing atmosphere,the mineral conversion behavior of high melting temperature coal ash adding different flux was studied by Raman spectroscopy . Effects of flux on the conversion of minerals in coal ash and slag were analyzed by X-ray diffraction (XRD). The results show that Raman characteristic peaks of ZJX coal ash are large in number and more complex at 1000℃. With the temperature increasing from 1200 ℃ to 1500 ℃,the minerals such as anorthite,quartz and forsterite in coal ash form eutectic mineral gradually,and content of amorphous increases,which results in significant decrease in the number of Raman characteristic peaks. Coal ash with addition of 6% single calcium-based flux forms eutectic at 1421 ℃;Coal ash with addition of 6% single magnesium-based flux forms eutectic at 1355℃;When added with calcium-magnesium complex(WCaO:WMgO=1)flux,coal ash slag forms eutectic at 1290 ℃. Therefore,calcium-magnesium complex flux has promoting effect on the formation of eutectic minerals.

Key words: Raman spectra;flux;slag structure;characteristic peak;XRD