Effect of bentonite on strength of raw pellets and finished pellets prepared from Baiyun Obo iron concentrate
LI Zhi-chao1, WANG Yu2, CHAI Yi-fan1, WANG Yi-ci1, LUO Guo-ping1, SONG Xi-wen1,3
1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Nei Mongol, China; 2. Ironmaking Plant, Baotou Steel Union Co., Ltd., Baotou 014010, Nei Mongol, China; 3. Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Baotou 014010, Nei Mongol, China
Abstract：Bentonites are mainly used as a binder in the production process of pellets to increase the strength of pellets. Different bentonites have different effects on the strength of the green pellets and finished pellets. Based on the determination of the physical-chemical properties and chemical composition of the two kinds of bentonites, they were mixed with Baiyun Obo iron concentrate to prepare the pellets, and the strength of the green pellets and finished pellets after calcination was determined experimentally. The analysis showed that the higher the content of the colloidal in the bentonite, the stronger the green pellets and finished pellets. The high water absorption rate of bentonite was beneficial to improve the compressive strength and falling strength of pellets. The SiO2 in bentonite can promote the formation of silicate in the pellets and improve the strength of the finished balls.
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LI Zhi-chao, WANG Yu, CHAI Yi-fan, WANG Yi-ci, LUO Guo-ping, SONG Xi-wen. Effect of bentonite on strength of raw pellets and finished pellets prepared from Baiyun Obo iron concentrate[J]. China Metallurgy, 2021, 31(4): 19-24.
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2021, Vol. 31 
