Abstract：Large amount of iron-bearing dust could be generated in the steel production process. At present，the best way of effective utilization of iron-bearing dust in China is pelletizing using the dust and to producemetallized pellet using the rotary hearth furnace. The basic characteristics of iron-bearing dust，including sintering，blast furnace and electric furnace dust，are investigated through the chemical analysis，laser particle size，BET specific surface area and X-ray diffraction. Furthermore，the pelletizing experiment ofthree kinds of dust is carried out，and the optimal pelletizing parameters are investigated based on the balling dynamics and the green pellet strength. The results show that the dust from sintering has good forming dynamics，while its green pellet strength can not meet the requirement under the current experimental condition. The dust from electric furnace has a relative large adhension，hence，tends to stick on the wall. The dust from blast furnace has not only a good forming dynamics，but has a large green pellet strengh. To ensure the yield and quality of the pellet，the appropriate pelletizing parameters of BFD are 12.5%～13.0%moisture，2% bentonite，20 min pelletizing time，27～31 r/min rotating speed and 5 kg feeding amount.
收稿日期: 2016-07-19
出版日期: 2017-05-04
引用本文:
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