Reaction kinetics during direct alloying of manganese ore cored wire
Wei Wu1, Qi Gao1, Bo Zhang1, Hua-dong Meng1, Lu Lin1,2, Jia-qing Zeng
1Metallurgical Technology Research Department, Central Iron and Steel Research Institute, Beijing 100081, China; 2 State Key Laboratory of Refractory and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
Reaction kinetics during direct alloying of manganese ore cored wire
Wei Wu1, Qi Gao1, Bo Zhang1, Hua-dong Meng1, Lu Lin1,2, Jia-qing Zeng
1Metallurgical Technology Research Department, Central Iron and Steel Research Institute, Beijing 100081, China; 2 State Key Laboratory of Refractory and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
摘要 In order to increase the reaction rates between the molten steel and the slag and cut down the reduction time when the top slag of manganese ore is added into the molten steel, a method of directly alloying manganese ore has been experimented in a 500-kg induction furnace. The results show that the manganese yield is greater than 90% when the wire feeding method is used. The manganese yield is 43.26% within 1 min. In contrast, the manganese yield for the top-slag adding process is only 10.98% for the same duration. The mass transfer rate of the manganese is greater in the molten steel than in the slag, and the limiting factor is the mass transfer rate of the manganese in the slag in the period of 10?30 min. The slag composition area is closer to the area of high melting point for the wire feeding method than for the top-slag adding process. During the slagging process, refining slag composed of CaO and SiO2 is formed after 15 min; after 25?30 min, refining slag with a high basicity is formed and consists of CaO, SiO2 and Al2O3.
Abstract：In order to increase the reaction rates between the molten steel and the slag and cut down the reduction time when the top slag of manganese ore is added into the molten steel, a method of directly alloying manganese ore has been experimented in a 500-kg induction furnace. The results show that the manganese yield is greater than 90% when the wire feeding method is used. The manganese yield is 43.26% within 1 min. In contrast, the manganese yield for the top-slag adding process is only 10.98% for the same duration. The mass transfer rate of the manganese is greater in the molten steel than in the slag, and the limiting factor is the mass transfer rate of the manganese in the slag in the period of 10?30 min. The slag composition area is closer to the area of high melting point for the wire feeding method than for the top-slag adding process. During the slagging process, refining slag composed of CaO and SiO2 is formed after 15 min; after 25?30 min, refining slag with a high basicity is formed and consists of CaO, SiO2 and Al2O3.
Wei Wu,Qi Gao,Bo Zhang, et al. Reaction kinetics during direct alloying of manganese ore cored wire[J]. Journal of Iron and Steel Research International, 2020, 27(3): 282-294.
2020, Vol. 27 
