Xuetao Wu¹, Rong Zhu¹, Guangsheng Wei¹, Kai Dong¹, Lingzhi Yang²; ¹University of Science and Technology, Beijing, ²Central South University

A hydraulic model with a similarity ratio of 1:4 was used to simulate the blowing parameters of 65t electric arc furnace (EAF). The molten bath stirring effects of different bottom blowing arrangements and flow rates under different combined blowing conditions were studied. On this basis, orthogonal experiments were designed to study the effects of bottom blowing rate, side blowing rate and bottom blowing arrangement on the mixing time of molten bath. The results showed that the bottom blowing arrangement has little effect on the mixing time of molten pool. Under the condition of combined blowing, the degree of influencing factors on mixed time from big to small was the side blowing rate, bottom blowing rate and bottom blowing arrangement. The industrial experiment showed that, compared with traditional process, the combined blowing process can increase the decarbonization rate and reduce the consumption of iron and steel materials.