(1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083,China 2. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China)
Abstract:In order to clarify the influences of chlorine on smelting process of BF dry dedusting technology, the occurrence, behavior and effect of chlorine carried in by raw materials are summarized. Further, the source of chlorine in Guofeng No.1 1 780 m3 BF dry dedusting technology were investigated by ion chromatography, with the consequence of 45.4 % chlorine from coke and 29.48 % from pulverized coal, while the main chlorine source in three other BFs dry dedusting technology from Baosteel, Tangsteel and Qian’ansteel is sinter, accounting for 47.12 %, 43.59% and 44.89%, respectively, which mainly derives from the difference in species, quantity and chlorine content of raw materials, so it should be given concrete BF to analyze the chlorine source. The chlorides in raw materials react into HCl in BF through thermodynamic analysis. Based on previous research, measures for decreasing chlorine in BF system are put up forward, as well as related directions for future research.
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