摘要:本實驗采用昆鋼125t轉爐的1∕10為模型，利用相似原理建立水力學模型，實型與模型的費勞德(Froude)準數相等，利用自來水模擬鋼液，空氣模擬氮氣，通過轉爐底部的兩個底吹孔吹入空氣。實驗中通過改變底吹孔個數、底吹氣流量以及液面高度觀察對熔池攪拌、噴濺量、混勻時間的影響，從而找出合理較佳的工藝參數。

　　　本次實驗表明:單純的底吹中，液面高度在熔池深度一半以下（約41.5cm），底吹氣流量在最大值2.50 m ³/h以下時，無論是由一孔還是兩孔，也無論如何改變液面高度，熔池的噴濺在液面以上3cm~15cm左右，偶有噴濺至爐口的現象。而在不同的孔數、液高下，隨著氣流量的改變形成了對熔池內液體的不同的攪拌形式，因而影響了熔池內液體的混勻時間。經實驗發現在所選13cm~23cm的液面高度內，在17cm~23cm液高以及1.50m ³/h~2.00m ³/h的底吹氣流量時采用兩孔底吹將對熔池形成最佳的攪拌效果。

關鍵詞：水力學模型；底吹氣流量；液面高度；熔池攪拌；混勻時間

ABSTRACT:The experiment use one-tenth of Kunming iron-steel 125t converter as the patterns. Hydraulics model is built by using similar theories . Solid model and the model’ Froude number equation. Use water simulation steel liquid nitrogen from air simulation of converter, via the bottom of converter’ two elements blowing air. This experiment by changing the number of bottom component、bottom blowing air flow and liquid level discuss the effect of pool mixing、splashing capacity and blending time in bath. So as to find out the best technological parameters.

    Experiments have found that in pure bottom blowing, when the liquid level at the half of weld pool (about 41.5cm) and bottom blowing air flow under the maximum 2.5m³/h, no matter one or two and how to change the liquid level, weld pool splashing capacity in liquid surface 3cm~15cm or so, by chance there to the phenomenon of the throat. And in different bottom component、liquid level , with the change of gas flow of molten pool formation of liquid in the form of different agitation, thus affecting the pool of liquid in the time blender . From the experiment we found that when the liquid in 13cm~23cm, control the liquid level at 17cm~23cm and 1.50 m³/h ~2.00m³/h bottom blowing air flow use two bottom components may to the weld pool formation optimal mixing effect. 

Keywords: Hydraulics model ; Bottom blowing air flow ; Liquid level ; Pool mixing ; Blending time