钢包底吹氩中非金属夹杂物分布的水力学模拟  

Hydraulic model experiment of non-metallic inclusion distribution in a bottom-blown argon ladle furnace

作　　者：巨建涛[1] 韦建庆 刘文果 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《钢铁》2017年第10期45-50,88,共7页Iron and Steel

基　　金：国家自然科学基金资助项目(51574190)

摘　　要：为了研究夹杂物在不同工艺参数条件下以及其本身性质对夹杂物去除的影响,确定最优的底吹参数和夹杂物分布规律,通过水力学模拟试验,利用高速摄像仪和专业的图像处理软件(Image Pro Plus)研究了某钢厂60 t精炼炉吹气量、时间、粒径大小对夹杂物的去除影响以及在不同高度上夹杂物的空间分布规律。结果表明,钢包底吹过程中,吹气时间对夹杂物的去除影响规律相同,14 min时夹杂物基本去除,流量为0.08 m^3/h,去除率最高;200~355μm的夹杂物比105~150μm的微型夹杂物更容易被去除;夹杂物在气液两相区的数量分布比其他区域少,且特征尺寸较大,在距离透气砖较远的底部存在一个弱流区,此区域夹杂物的密度较大,不易去除。In order to investigate the optimum bottom blowing parameters and inclusion distribution, the influence of in- clusion removal under different process parameters and their own properties were studied. Based on the hydraulic model experiment of the 60 t refining furnace, the effects of air blowing, time and particle size on the removal of inclusions and spatial distribution of inclusions were studied by using high-speed camera and professional image processing soft- ware （Image Pro Plus）. The results show that the best flow rate is 0.08 m3/h in the ladle bottom blowing process. The in- clusion removal rate is similar with the time and the inclusions are basically removed for fourteen minutes.The inclusions of 200 to 355 pan are easier to be removed than the micro-inclusions of 105 to 150 ~tm. The number of inclusions in gas-liq- uid two-phase region is less than that in other regions, and the characteristic size is larger. There is a weak flow zone at the far bottom of the ~zas oermeable brick. The density of inclusions in this area is larger and, it is not easy to be removed.

关 键 词：夹杂物 水模拟 钢包 空间分布 去除 

分 类 号：TF769.2[冶金工程—钢铁冶金]