A technology for suspension magnetization roasting−magnetic separation was proposed to separate iron minerals for recovery.The optimum parameters were as follows:a roasting temperature of 650℃,a roasting time of 20 m...A technology for suspension magnetization roasting−magnetic separation was proposed to separate iron minerals for recovery.The optimum parameters were as follows:a roasting temperature of 650℃,a roasting time of 20 min,a CO concentration of 20%,and particles with a size less than 37μm accounting for 67.14%of the roasted product.The total iron content and iron recovery of the magnetic concentrate were 56.71%and 90.50%,respectively.The phase transformation,magnetic transition,and microstructure evolution were systematically characterized through iron chemical phase analysis,X-ray diffraction,vibrating sample magnetometry,X-ray photoelectron spectroscopy,and transmission electron microscopy.The results demonstrated the transformation of hematite to magnetite,with the iron content in magnetite increasing from 0.41%in the raw ore to 91.47%in the roasted product.展开更多
基金Project(CNMRCUKF2301)supported by the Open Foundation of State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,ChinaProject(52174240)supported by the National Natural Science Foundation of China+1 种基金Project(2021YFC2902404)supported by the National Key Research and Development Program of ChinaProject(N2101023)supported by the Fundamental Research Funds for the Central Universities,China。
基金Project(2021YFC2902404)supported by the National Key Research and Development Program of ChinaProject(2023JH3/10200010)supported by the Excellent Youth Natural Science Foundation of Liaoning Province,China+2 种基金Project(XLYC2203167)supported by the Liaoning Revitalization Talents Program,ChinaProject(CNMRCUKF2301)supported by the Open Foundation of State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,ChinaProject(52274253)supported by the National Natural Science Foundation of China。
基金financially supported by the National Natural Science Foundation of China (Nos.51904058,52174240)the Fundamental Research Funds for the Central Universities,China (No.2101023)。
文摘A technology for suspension magnetization roasting−magnetic separation was proposed to separate iron minerals for recovery.The optimum parameters were as follows:a roasting temperature of 650℃,a roasting time of 20 min,a CO concentration of 20%,and particles with a size less than 37μm accounting for 67.14%of the roasted product.The total iron content and iron recovery of the magnetic concentrate were 56.71%and 90.50%,respectively.The phase transformation,magnetic transition,and microstructure evolution were systematically characterized through iron chemical phase analysis,X-ray diffraction,vibrating sample magnetometry,X-ray photoelectron spectroscopy,and transmission electron microscopy.The results demonstrated the transformation of hematite to magnetite,with the iron content in magnetite increasing from 0.41%in the raw ore to 91.47%in the roasted product.