Research and application of fluorine-free environment friendly KR desulfurizer
HAN Bao1, DENG Yong1, YANG Li-bin2, WANG Long-xing2
1. No.4 Steel Making and Rolling General, Masteel, Ma'anshan 243001, Anhui, China; 2. Department of Metallurgical Technology Research, Central Iron and Steel Research Institute, Beijing 100081, China
Abstract:Fluorine-free environmental protection desulfurizer is significance for the protection of environmental and fluorine resources. Through the calculation and analysis of the desulfurization mechanism of molten iron, it is concluded that using Al2O3 micro powder instead of fluorite as flux for KR molten iron desulfurization can promote the flux, reduce the oxygen activity of molten iron and increase the reaction temperature.Through melting point and process research, the optimum ratio of fluoride-free desulfurizer is 15∶85.The experimental results showed that adding a certain amount of Al2O3 into the desulfurizer is beneficial to accelerate the speed of desulfurization reaction, reduce the melting point of lime, increase the desulfurization rate of desulfurizer, and improve the utilization rate of lime particles. The average consumption of free-fluorine desulfurizer is decreased more than 0.3 kg/t, the average sulfur content was 0.003 1%, and the average desulfurization rate was 86.13%. It can meet the demand of hot metal desulfurization task and realize the complete replacement of fluorine desulfurizer.
韩宝, 邓勇, 杨利彬, 王龙星. 无氟环保型KR脱硫剂的研究与应用[J]. 连铸, 2022, 41(5): 120-124.
HAN Bao, DENG Yong, YANG Li-bin, WANG Long-xing. Research and application of fluorine-free environment friendly KR desulfurizer. CONTINUOUS CASTING, 2022, 41(5): 120-124.