镁铝尖晶石的铝铬渣与用后镁碳砖低温合成

Low temperature synthetic magnesium aluminum spine by using aluminum chromium slag and wasted MgO-C brick

用铝铬渣和转炉用后镁碳砖细粉为主要原料,通过固相烧结反应合成MgAl_2O_4材料。用X射线衍射、扫描电镜及XPert plus软件对材料中主晶相进行表征。结果表明:当烧成温度为1 400℃,镁碳砖与铝铬渣摩尔比为5:1时,生成的镁铝尖晶石晶粒发育完整清晰,排列致密,外貌呈典型的八面体形貌。镁铝尖晶石质量百分数达到92%。

The aluminum chromium slag and wasted MgO-C brick powder are taken as the main starting materials,the magnesium aluminum spine（MgAl_2O_4） is obtained by solid state reaction.The main crystalline phase and microstructure are examined by X ray diffraction,scanning electron microscopy and X Pert plus software.The result shows that the grain growth of magnesium aluminum spine is complete and clear,the appearance is typical octahedral morphology,the arrangement is dense and the content of MgAl_2O_4 is 92%when the ratio of wasted MgO-C brick and aluminum chromium slag is 5： 1 and firing temperature is 1 400℃.