Abnormal reduction swelling mechanisms of pellets from Bayan Obo iron ore
SHEN Mao-sen1, LÜ Zhi-yi2, KANG Wen-ge2, BAI Xiao-guang2, LI Yu-zhu2, MENG Wen-xiang1
1. Mine Research Institute, Baotou Steel Group, Baotou 014030, Nei Mongol, China; 2. Technical Center, Baotou Steel Group, Baotou 014010, Nei Mongol, China
Abstract：The abnormal reduction swelling mechanisms of pellets from Bayan Obo iron ore was investigated by comparing the microstructure of the iron ore, concentrates and pellets before and after reduction. The results showed that the outburst of volatiles in the pores of pellets increased the gap between the matrix grains, speeded up the diffusion of reducing gas, increased the reaction area, and accelerated the reduction speed, which resulted in the abnormal swelling of pellets. The "volatile swelling theory of Bayan Obo pellets" was a new theory, which had important guiding significance to restrain the abnormal swelling of the Bayan Obo pellet.
沈茂森, 吕志义, 康文革, 白晓光, 李玉柱, 孟文祥. 白云鄂博铁球团矿异常还原膨胀的机理[J]. 中国冶金, 2021, 31(3): 17-21.
SHEN Mao-sen, LÜ Zhi-yi, KANG Wen-ge, BAI Xiao-guang, LI Yu-zhu, MENG Wen-xiang. Abnormal reduction swelling mechanisms of pellets from Bayan Obo iron ore[J]. China Metallurgy, 2021, 31(3): 17-21.
2021, Vol. 31 
