Effect of two-step slag making refining on sulfur and aluminum in C82DA steel
LIU Zong-hui1, QIN Feng-ting2, REN Jian-zhong3, ZHU Miao-yong1
1. School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China; 2. Department of Metallurgical and Chemical Engineering, Jiyuan Vocational and Technical College, Jiyuan 459000, Henan, China; 3. Technology Management Department, Henan Jiyuan Iron and Steel (Group) Co., Ltd., Jiyuan 459000, Henan, China
Abstract：In order to study the effect of technology on sulfur and aluminum in C82DA steel. The process of desulfurization and aluminum control of cord steel in LF was studied. The results show that with the decrease of refining basicity, the desulfurization rate becomeslower. When basicity is about 1.6, w((FetO)+(MnO)) in slag is about 1%, basically reaching the critical value of desulfurization.When basicity is about 1.2, sulfur recovery begins with refining time. The decrease of w([Als]) in molten steel gradually decreases with the decrease of basicity. When basicity is greater than 2.2, the decrease of w([Als]) is significant. When basicity is less than 1.6, the effect on w([Als]) is no longer obvious. The LF adopts two-step slag making process, high basicity desulfurization in the early stage and low basicity aluminum reduction in the later stage. When basicity is reduced from 2.2 to about 1.2, w([S]) and w([Als]) are controlled at the lower level of 0.011% and 0.001 6% respectively.
刘宗辉, 秦凤婷, 任建忠, 朱苗勇. LF两步造渣工艺对C82DA钢中硫和铝的影响[J]. 钢铁, 2020, 55(7): 78-84.
LIU Zong-hui, QIN Feng-ting, REN Jian-zhong, ZHU Miao-yong. Effect of two-step slag making refining on sulfur and aluminum in C82DA steel[J]. Iron and Steel, 2020, 55(7): 78-84.
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2020, Vol. 55 
