气化灰渣矿物学表征方法研究

Characterization methods of gasification ash mineralogy

煤气化作为煤化工的龙头技术在推动煤化工可持续发展中具有重要作用,而灰渣的矿物学特征是反映煤气化工况,影响煤气化过程稳定运行的关键因素。阐述了传统气化灰渣矿物成分组成和结构形貌分析表征方法的工作原理和研究现状。分析了一些新发展表征技术在灰渣矿物表征分析中的应用,如高温X射线衍射可直接获得不同温度下矿物质的衍射图谱;穆斯堡尔谱不仅可对煤和灰渣中含铁矿物质进行定性、定量分析,还可确定矿物质中Fe2+/Fe3+、晶体结构参数、固溶体种类和含量;微区分析利用SEM与X射线能谱联用确定矿物的微区成分。在气化灰渣矿物特性分析中,应根据灰渣矿物的组成特点选择适当的表征分析技术。

Coal gasification plays an irreplaceable role in promoting the sustainable development of coal chemical industry.The characteristics of ash have become the key factor to reflect the status and influence of the stable operation of coal gasification process.Introduce the current development and working principle of traditional characterization analysis of the composition,structure and morphology in gasification ash.Investigate the application of some new technologies,such as HTXRD,which can directly achieve the diffraction pattern of minerals at different temperature.M（o）ssbauer spectroscopy can determine the iron materials in coal and ash through the qualitative and quantitative analysis,it also can test Fe2＋/Fe3＋,crystal structure parameters,solid solution types and content.Microanalysis can test the micro-constitution of minerals using SEM and X-ray.The choice of analysis technologies should depend on the composition features of ash.