Fluidized bed reactor for magnetizing roasting of iron ore and its engineering implementation
Magnetizing roasting of complex iron ore has been investigated in a fluidized bed reactor. The influence of particle size, roasting temperature, roasting time and gas composition on reduction degree of different iron ores was studied in detail. The as-roasted iron ores were then subjected to magnetic separation, where the influence of magnetic field intensity, particle size and reduction time on the Tfe in the concentrate has also been investigated. We found that although the structure of iron ore can be quite different, the roasting time to onvert the iron ore to magnetite is quite close, e.g. 10-15 min at 500 °C, 8-10min at 550 °C and ~5 min at 600 °C. Depending on the ore structure, the Tfe in the concentrate can reach up to 60％ with Fe recovery rate greater than 85％. Based on these small scale investigations, a pilot plant of 100,000 tons per annual has been implemented by a private company and the commissioning of the plant is due to start early Nov. 2008.
Fluidized bed reactor magnetizing roasting iron ore beneficiation
Baolin Hou Shaotao Cao Qingshan Zhu
State Key Laboratory of Multiphase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China
国际会议
第四届中日化工学术研讨会(The 4th Joint China/Japan Chemical Engineering Symposium)(CJCES)
成都
英文
2007-12-19（万方平台首次上网日期，不代表论文的发表时间）