論文ID: ISIJINT-2025-069
In this paper, the oxygen lance of a steel plant is taken as the research object. The jet behavior under the influence of two factors of oxygen nozzle deflection angle and oxygen flow is studied by combining numerical simulation with industrial experiment. The results show that the coalescence behavior of the oxygen jet is obvious, and the oxygen jet basically completes the coalescence at about 0.9m at the outlet of the oxygen lance. When the nozzle deflection angle of oxygen lance is 12°, the surface of liquid steel fluctuates greatly. When the oxygen flow is increased, the impact crater area of scheme 3 is effectively expanded and the stability is increased. Under the three experimental schemes, the maximum exposed area of liquid steel are 7.18m2, 7.08m2 and 7.42m2 respectively. The reflection jet angle(θ) changes the most at low position, from 68.0° to 54.8°, 67.2° to 48.9°, 67.6° to 59.8°, respectively. When the oxygen lance position exceeds 1750mm, the θ changes are less than 50°, the slag diffusion area is the largest, and the liquid steel reaction is dynamically stable. The industrial test shows that the composition of liquid steel and slag fluctuates greatly when 12° oxygen lance is used for blowing. When the nozzle deflection angle of oxygen lance increases to 13° and the oxygen flow increases to 42000Nm3/h, the average oxygen content of liquid steel can be controlled to 573.28ppm, the average total iron content in the slag can be reduced to 16.35%.
