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利用扫描电子显微镜的背散射电子像观察了3个钢厂转炉钢渣共80个试样的矿物形貌,用扫描电子显微镜、X射线能谱仪测定了这些矿物中共2613个微区的元素成分,进而用统计分析的方法确定了具有相同形貌特征相的矿物类别,并用X射线衍射分析验证了这些试样中矿物的种类。结果表明:在高碱度钢渣中,硅酸二钙(C2S)呈圆粒状和树叶状,硅酸三钙(C3S)呈六方板状,铁铝钙相和镁铁相呈不规则形貌;主要矿物相为C2S、铁铝钙及镁铁相固溶体,还含有少量的C3S,游离CaO和MgO;铁铝钙相的典型组成是铁铝酸钙,其表达式为Ca2(Al,Fe)2O5,还发现长期以来由于组成未知而被人们定名为RO相的物质成分是镁铁相固溶体,其代表性组成是MgO·2FeO。
Abstract：The microstructure of 80 converter slag samples from 3 steel plants was observed by the back scattered electron images of a scanning electron microscope. The element composition of 2 613 micro-regions in the mineral phase was determined by scanning electron microscopy with energy dispersive X-ray diffraction analysis, and then the composition data of the mineral phases with the same morphology characteristics was analyzed by statistics in order to ascertain the mineral category. The results show that the mor- phology of dicalcium silicate (C2S) in high alkalinity slag has a round or leaf shape; tricalcium silicate (C3S) is hexagonal, and the phases of Fe2O3–Al2O3–CaO and MgO–FeO both are irregular. The main phases in the slag are C2S, Fe2O3–Al2O3–CaO and MgO–FeO solid solution.The minor minerals are C3S, free-CaO and MgO. It was found that the representative composition of the Fe2O3–Al2O3–CaO phase is calcium aluminoferrite, the chemical formula of which is Ca2(Al, Fe)2O5. The RO phase, which has been unknown for a long time, is MgO–FeO solid solution, and its representative composition is MgO·2FeO.
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基本信息:
DOI：
中图分类号:TF713.3
引用信息:
[1]侯贵华,李伟峰,郭伟等.转炉钢渣的显微形貌及矿物相[J].硅酸盐学报,2008(04):436-443.
基金信息:
江苏高校自然科学重大基础研究(06KJA43009);; 江苏省生态环境材料重点实验室开放基金(XKY2006018)资助项目