摘要:
为了推断高压条件下气体在液体金属中的存在形态和运动形态,通过水模拟试验研究压强、底吹流量对气泡形状、尺寸、数量及"渣眼"尺寸的影响,结果表明:随着底吹流量增加,高压条件下的气泡比常压条件下的气泡更趋向于正圆形,气泡直径平均值变小,气泡数量增多,气泡形状和直径在底吹流量为4 L/h时变化最为明显;当底吹位置和底吹流量不变时,随着压强的增加,气泡形状逐渐趋向于正圆形,气泡直径逐渐变小,气泡数量逐渐增多,"渣眼"面积逐渐减小。在常压和高压条件下,底吹流量超过5 L/h之后,气泡形状和直径平均值就不再有明显变化。当底吹流量为4 L/h时,压强升高到0.5 MPa后,气泡形状和直径平均值变化幅度较小。为高压条件下冶炼提供数据参考。
Abstract:
In order to explore the existence form and movement form of the gas in liquid metal under the condition of high pressure,a serial of water model experiments had been carried to obtain the effect of pressure and bottom flow rate on the shape,diameter,quantity of bubble and slag eye area.The experimental results indicate that compared with atmospherica pressure,when increasing bottom blowing flow rate,high pressure cause air bubbles generated tend to be much round,and the average bubble diameter decreases and the number of bubbles increases.When the bottom blowing flow rate is 4 L/h,the change of bubble diameter and shape is most remarkable.When at constant flow rate and bottom blowing position,with the increase of the pressure,the bubble shape gradually tend to round,air bubble diameter became smaller,the the number of bubble increase gradually, "slag eye" area gradually decreases.Under the condition of normal pressure and high pressure,when bottom blowing flow after excesses 5 L/h,the change of bubble diameter and shape is not obvious.When the bottom blowing flow rate is at 4 L/h and pressure is at 0.5 MPa,the change of average bubble diameter and shape is very small.This research result can provid reference for the development of high pressure metallurgy.
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