Abstract:According to the flow field and mixing characteristics of molten steel in ingot mould, the eccentric bottom blowing process of ingot was proposed, the Fluent software was used to study the influence of blowing argon flow rate and bottom blowing position on the flow field and mixing characteristics of molten steel in a 40 t steel ingot. The result shows that non-symmetric circulating flow is formed in the eccentric bottom-blown argon steel ingot. The two-phase region continuously expands in the radial direction before the gas-liquid two-phase flow reaches the riser zone, while after it reaches the riser zone, the two-phase region becomes smaller. When the bottom blowing flow rate (argon flow rate) is less than 40 L/min, no obvious complete circulating flow is formed in the ingot mould. A complete circulating flow is formed until the bottom blowing flow rate increases to 60 L/min. As a whole, the mixing time decreases with the increase of blowing argon flow rate, but the mixing flow has an optimum value. As the distance between bottom blowing position and the bottom center of ingot increases, the mixing time decreases. In this work, the optimum bottom blowing position is the position at a half of steel ingot radius.
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