氧化对含钛高炉渣含钛相演变规律的影响

氧化条件下含钛高炉渣中含钛矿相的改变是含钛高炉渣综合利用的关键.通过扫描电子显微技术、X射线能谱分析、X射线物相分析和图像分析等手段,对氧化前的含钛高炉渣及其氧化改性后渣的形貌像进行分析.结果表明,氧化后渣中含钛相的形貌、成分和相结构等发生变化;钛的赋存状态也发生相应的改变,渣中攀钛透辉石和富钛透辉石几乎消失,渣中弥散分布的钛组分大部分转移到钙钛矿相,而且实现长大和粗化.

Effects of Oxidation on Evolution of Ti-Bearing Mineral Phasesin Ti-Bearing Blast Furnace Slag

Changing the Ti-bearing mineral phases in Ti-bearing blast furnace slag under oxidizing condition is crucial to the comprehensive utilization of the slag.The morphologies of the Ti-bearing slag before and after oxidation/modification were analyzed by means of SEM,XRD,X-ray spectrum and back scattered image analysis.The results indicated that the morphology,composition and phase structure of the Ti-bearing mineral phases after oxidation all change,as well as the existence condition of titanium.In the slag both the titanaugite and Ti-rich diopside almost vanish and most of the dispersed Ti component has been transferred into perovskite phase and then fully grows and coarsens.