Experiment on cold performance of fluxed pellets prepared from Zhongguan iron ore powder
LUO Lin-gen1, PANG Jian-ming1, SONG Yao-xin1, SHI Xue-feng2, CHEN Ze-yu2, HU Qi-chen3
1. CISRI Engineering Design Co., Ltd., China Iron and Steel Research Institute Group, Beijing 100081, China; 2. School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China; 3. Technology Research Institute, HBIS Group Co., Ltd., Shijiazhuang 050023, Hebei, China
Abstract:By increasing the proportion of molten pellets into the furnace, the structure of the furnace charge is improved, the energy consumption of the ironmaking system is reduced, and the emission of pollutants in the ironmaking process is reduced through the "source reduction" approach. The core link to achieve high pellet ratio smelting is to prepare flux pellets, and the quality of flux pellets depends on the performance of raw balls, so ensuring the quality of raw balls is an important part of exploring the preparation process of flux pellets. Due to the low silicon content and suitable magnesium content of Zhongguan iron ore, which is suitable as the raw material for low silicon flux pellets, Zhongguan iron ore was used as raw material to explore the preparation process of flux pellets, and on this basis, the factors affecting the quality of flux pellets (particle size, time, moisture, bentonite, SiO2 content, alkalinity and MgO content) are analyzed. The test results show that the compressive strength, falling strength and bursting temperature of raw pellets are not greatly affected by the changes of alkalinity, SiO2 and MgO content. The compressive strength, falling strength and bursting temperature of raw pellets are mainly affected by the pellet making time, moisture, binder dosage, physicochemical properties of iron ore powder and melt, and the compressive strength, falling strength and bursting temperature of raw pellets are better and meet the transportation and furnace requirements when the pellet making time is maintained at 12 min, moisture is maintained between 8% and 9%, and bentonite dosage is 2%.
罗林根, 庞建明, 宋耀欣, 师学峰, 陈泽宇, 胡启晨. 中关铁矿制备熔剂性球团生球性能试验[J]. 钢铁, 2022, 57(12): 32-40.
LUO Lin-gen, PANG Jian-ming, SONG Yao-xin, SHI Xue-feng, CHEN Ze-yu, HU Qi-chen. Experiment on cold performance of fluxed pellets prepared from Zhongguan iron ore powder[J]. Iron and Steel, 2022, 57(12): 32-40.
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