Analysis on effects of multiple MgO-bearing additive on pellet production
WANG Xin-yu1, ZENG Yu2, LI Lin-chun2, LI Guang-sen3
1. School of Applied Technology, University of Science and Technology Liaoning, Anshan 114045, Liaoning, China; 2. Ironmaking Plant, Angang Steel Co., Ltd., Anshan 114001, Liaoning, China; 3. Jidong Development Group International Trading Co., Ltd., Beijing 100124, China
Abstract：Pellet is one kind of iron-making raw material with high quality, and its proportion in the blast furnace charge is increasing gradually. Effects of multiple MgO-bearing additive replacing bentonite to improve MgO content in finished pellet on the pellet quality and metallurgy properties were investigated. The result indicated that after the replacement, the compression strength of green pellet decreased slightly, drop times changed little and bursting temperatures were all above 600 ℃, the low-temperature reduction disintegration index changed little and was all above 92% which could satisfy the requirement of blast furnace melting. The reduction degree and reduction expansion performance were significantly improved. The MgO content and reduction degree (RI) of the pellet increased from 0.2% to 2.0% and from 67.58% to 71.47%, respectively. The reduction expansion performance (RSI) decreased from 23.51% to 19.25%.
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2021, Vol. 31 
