(東北大學(xué) 材料與冶金學(xué)院 多金屬共生礦生態(tài)化利用教育部重點(diǎn)實(shí)驗(yàn)室，沈陽 110819)
摘 要: 將高鐵一水硬鋁石礦進(jìn)行馬弗爐、強(qiáng)磁場焙燒預(yù)處理，分別考察焙燒溫度和磁場強(qiáng)度對焙燒礦溶出赤泥沉降性能的影響；利用XRD對焙燒礦溶出赤泥的物相組成變化進(jìn)行分析，并進(jìn)一步探討焙燒礦赤泥沉降性能變化機(jī)理。結(jié)果表明：焙燒預(yù)處理對礦物的沉降性能有較大影響，馬弗爐焙燒預(yù)處理?xiàng)l件為焙燒溫度550 ℃、保溫時(shí)間60 min；強(qiáng)磁場焙燒預(yù)處理?xiàng)l件為磁場強(qiáng)度9 T、500 ℃、60 min；預(yù)處理后的焙燒礦赤泥的沉降性能均較原礦有所提高，且強(qiáng)磁場焙燒礦赤泥的沉降性能優(yōu)于馬弗爐焙燒礦的。
關(guān)鍵字: 一水硬鋁石；強(qiáng)磁場；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
