(东北大学 材料与冶金学院 多金属共生矿生态化利用教育部重点实验室，沈阳 110819)
摘 要: 将高铁一水硬铝石矿进行马弗炉、强磁场焙烧预处理，分别考察焙烧温度和磁场强度对焙烧矿溶出赤泥沉降性能的影响；利用XRD对焙烧矿溶出赤泥的物相组成变化进行分析，并进一步探讨焙烧矿赤泥沉降性能变化机理。结果表明：焙烧预处理对矿物的沉降性能有较大影响，马弗炉焙烧预处理条件为焙烧温度550 ℃、保温时间60 min；强磁场焙烧预处理条件为磁场强度9 T、500 ℃、60 min；预处理后的焙烧矿赤泥的沉降性能均较原矿有所提高，且强磁场焙烧矿赤泥的沉降性能优于马弗炉焙烧矿的。
关键字: 一水硬铝石；强磁场；溶出性能；沉降性能
（Key Laboratory for Ecological Utilization of Multimetallic Mineral, Ministry of Education,
School of Materials and Metallurgy, Northeastern University, Northeastern University, Shenyang 110819, China）
Abstract:The diasporic bauxite with high-iron content was pre-roasted in muffle furnace and strong magnetic field, respectively, to investigate the effects of roasting temperature and magnetic field intensity on the settling performance of red mud from roasted diasporic bauxite. The changes of phase composition of the diasporic bauxite with high-iron content were analyzed by XRD, and the change mechanism of the settling performance of the red mud was discussed. The results indicate that pre-roasting has considerable effect on the settling performance of the ore. The suitable pre-roasting conditions by using muffle furnace and strong magnetic field are 550 ℃ for 60 min and 500 ℃ for 60 min in 9 T, respectively. Under these conditions, the settling performance of red mud is improved. The settling performance of the red mud treated in the strong magnetic field is better than that of red mud treated in muffle furnace.
Key words: diasporic bauxite; intense magnetic field; digestion performance; settling performance
