差流量吹氩模式对150 t钢包混匀与顶渣行为的影响

胡群; 李小松; 张家泉; 连艳新; 唐海燕

doi:10.13228/j.boyuan.issn0449-749x.20200252

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钢铁 ›› 2020, Vol. 55 ›› Issue (12) : 31-38. DOI: 10.13228/j.boyuan.issn0449-749x.20200252

炼钢

差流量吹氩模式对150 t钢包混匀与顶渣行为的影响

胡群¹, 李小松¹, 张家泉¹, 连艳新², 唐海燕¹

作者信息 +

Effect of differential flowrate argon blowing mode on mixing and top slag behavior for a 150 t ladle

胡群¹, 李小松¹, 张家泉¹, 连艳新², 唐海燕¹

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文章历史 +

摘要

针对钢包传统的双孔等流量底吹氩模式在流量较大时造成的流股相互碰撞、搅拌能耗散大、钢包卷渣和钢水二次氧化倾向大的问题,提出一种双孔差流量搅拌模式,并以150 t工业钢包为原型,采用1∶3物理模型研究了两个吹氩孔分布、吹氩流量和渣层厚度对新底吹模式下钢水混匀时间与顶部渣眼面积的影响。结果表明,与传统等流量吹氩模式相比,双孔差流量搅拌钢包混匀时间和渣眼面积普遍有所减小。其中,两个底吹透气砖在包底0.6R(钢包底部半径)处、夹角为180°时,可获得较短的混匀时间和较小的渣眼,且两个渣眼出现在钢包液面两侧,避免了常见的渣层偏聚不均匀现象。研究结果为工业实践中采用新型双孔差流量搅拌模式改善钢包冶金效果、更好地抑制钢水二次氧化提供了依据。

Abstract

In view of the problems caused by the collision of flow streams, the dissipation of stirring energy, the entrapment of ladle slag and the secondary oxidation of molten steel from the traditional double-hole equal flow bottom stirring mode in ladle with large flow rate,this paper puts forwards a novel double-hole differential flow rate stirring mode, taking a 150 t industrial ladle as the model, using a 1∶3 physical model to study the effect of the bottom blowing position, gas flow rate, and slag layer thickness on the ladle mixing and top slag exposed area under this mode, and compared with the double-hole same flow rate blowing mode. The results show that the double-hole differential flow stirring mode has a shorter mixing time and smaller top flux exposed area than the same flow stirring mode for the most cases, which may become a potential new ladle mixing mode. When the bottom blow holes are at 0.6R and the relative angle is 180°, the mixing time and slag eyes are small, and the two slag eyes are distributed on both sides of the ladle, which is beneficial to active the slag layer and reduce the secondary oxidation of molten steel.

关键词

钢包 / 差流量吹气模式 / 混匀时间 / 渣眼面积 / 物理模拟

Key words

ladle / differential flow rate stirring mode / mixing time / top flux eye size / physical modelling

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胡群, 李小松, 张家泉, 等. 差流量吹氩模式对150 t钢包混匀与顶渣行为的影响[J]. 钢铁, 2020, 55(12): 31-38 https://doi.org/10.13228/j.boyuan.issn0449-749x.20200252

HU Qun, LI Xiao-song, ZHANG Jia-quan, et al. Effect of differential flowrate argon blowing mode on mixing and top slag behavior for a 150 t ladle[J]. Iron and Steel, 2020, 55(12): 31-38 https://doi.org/10.13228/j.boyuan.issn0449-749x.20200252

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