New Technology and Magnetic Property of Fast Reducing Roasting for Fine Iron-Bearing Materials
The technological features of the techniques of fast reducing roasting (FRR) and conventional magnetic roasting are briefly described. The test equipment suitable for FRR of fine-grained materials is introduced. The results of tests of low-grade refractory iron ore and the used equipment are introduced. It is the first time that a magnetic roasting process achieves FRR. In a weakly reducing atmosphere and at 740-800 ℃, refractory powder ferrous material (-0.30 mm) which is rich in specularite, limonite and Mg-Mn siderite was subjected to FRR for a few seconds to one minute. Weakly magnetic iron concentrates with iron grade of 55.67%-55.21% (due to high content of Mg and Mn in the ore) and iron yield of 81.66%-86.57% were used The results of magnetism detection of the material, before and after the FRR, indicated that weakly magnetic material was mainly converted into strongly magnetic material Fe3O4 with specific saturation magnetic moment. It indicates that it is practicable to use the FRR technique to improve the utilization of iron ore resources that are of marginal grade.
iron material fast reduction reducing roasting thermal decomposition magnetic separation
LUO Li-qun YU Yong-fu ZHANG Jing-sheng
College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hu College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hu Changsha Research Institute of Mining and Metallurgy, Changsha 410012, Hunan, China
国际会议
The 5th International Congress on the Science and Technology of Ironmaking(第五届国际炼铁科技大会 ICSTI09)
上海
英文
488-493
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）