矿渣微晶玻璃的析晶行为与性能  

Crystallization behavior and properties of glass ceramic of ferrous tailings and slag

作　　者：史培阳[1] 张影[1] 张大勇[1] 王媛媛[1] 姜茂发[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004

出　　处：《中国有色金属学报》2007年第2期341-347,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50204005)

摘　　要：以铁尾矿、硼泥和粉煤灰制备矿渣微晶玻璃,利用X射线衍射仪、扫描电镜和穆斯堡尔谱对微晶玻璃的微观结构进行研究。结果表明:矿渣微晶玻璃的主析晶相为钙铁辉石,次晶相为普通辉石和紫苏辉石;随着硼泥配入量的增加,矿渣微晶玻璃中晶体的析出量和尺寸均逐渐增加,晶体形态由枝晶向球晶及块状晶体过渡;枝晶向球晶转变可以明显改善矿渣微晶玻璃的性能,而球晶向块状晶体的转变则恶化了微晶玻璃的性能。在本实验研究的条件下,Fe2+主要分布在析晶相中,起到促进晶体析出的作用;随着硼泥配入量的增加,Fe3+含量也逐渐增加,Fe2+和Fe3+共同促进了熔体内部的晶体析出。The slag glass-ceramic was prepared from ferrous tailing, boron mud and fly ash. The microstructure of glass-ceramic was investigated by X-ray diffractometry, scanning electron microscope and Moessbauer spectrum. The results show that, Main crystallization phase of glass ceramic was hedenbergite, and the minor crystallization phases were augite and hypersthene. With increasing boron mud addition, the amount and the size of crystallization phases both gradually increased, the configure of crystallization phases transformed from the branch, the ball, to the block. The transformation from the branch to the ball could improve the properties of glass ceramic, and the transformation from the ball to the block could worsen the properties of glass ceramic. On the experimental condition, most of Fe^2＋ was distributed in crystal phase, which promoted the crystal precipitation. As increasing of boron mud, the concentration of Fe^3＋ was increased. Fe^2＋ and Fe^3＋ promoted the crystal precipitation together.

关 键 词：微晶玻璃 铁尾矿 微观组织 穆斯堡尔谱 

分 类 号：TQ171[化学工程—玻璃工业]