大钢锭浇铸过程双底吹氩钢液流动数学模拟
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- 英文论文题名：Mathematical Simulation on Molten Steel Flow in Large Ingot Mold with Double Bottom Ar Bubbling Beams during Casting
- 论文作者：钟良才 ; 杨凯军 ; 周小宾 ; 王洪亮 ; 蒋鹏 ; 刘国强 ; 郝培峰
- 英文论文作者：Zhong Liangcai ; Yang Kaijun ; Zhou Xiaobin ; Wang Hongliang ; Jiang Peng ; Liu Guoqiang ; Hao Peifeng ; Metallurgy School ; Northeastern University ; Baoshan Iron and Steel Co. ; Ltd.
- 年：2016
- 作者机构：东北大学冶金学院;宝山钢铁股份有限公司;
- 论文关键词：大钢锭 ; 模铸 ; 底吹氩 ; 钢液流动 ; 速度场 ; 温度场 ; 数学模拟
- 英文论文关键词：large ingot ; ingot casting ; bottom Ar bubbling ; molten steel flow ; velocity field ; temperature distribution ; mathematical simulation
- 会议召开时间：2016-05-19
- 会议录名称：第十九届（2016年）全国炼钢学术会议大会报告及论文摘要集
- 语种：中文
- 分类号：TF775
- 学会代码：ZGJS
- 会议名称：第十九届（2016年）全国炼钢学术会议
- 会议地点：中国湖南长沙
- 主办单位：中国金属学会炼钢分会
- 学会名称：中国金属学会
- 页数：1
- 文件大小：57k
- 原文格式：O
- 会议级别：全国
摘要
建立了钢锭浇铸过程底吹氩模内流体流动数学模型,对钢锭模型和实际钢锭浇铸过程流体在模内的流动分别进行了模拟计算。结果表明,物理模拟和数学模拟的模内浇铸初期流股凸起高度、浇铸期间的气体流动形态和混匀时间的模拟结果吻合良好,不吹气时铸模内流场的速度相比吹气时小,其涡心相对比较靠近液面,并偏向壁面一侧。而吹气时,涡心有所下移,并靠近吹气侧,与壁面的距离变远。不吹气时,锭模内钢液速度低于0.06m/s的区域占了对称面的大部分区域;而吹气时,锭模内流场速度明显增加,大部分区域的速度在0.06m/s以上。钢锭模内不吹氩时,在下部存在一个较大的大约为80℃温差的温度梯度区域,而钢锭模吹氩流量在0.253m~3/h的条件下,钢水温度低且比较均匀,具有温度梯度的区域明显减小,温差约为40℃。
A mathematical model of fluid flow during ingot casting with Ar bubbling was set up and fluid flow in ingot mold model and industrial mold on casting was numerically calculated,respectively.The results show that the spout height at initial casting,bubble flow shape and mixing time from numerical calculation are good agreement with those from physical modeling.The velocity of flow field in mold without gas bubbling is smaller than that with gas bubbling.The vortex is near to liquid level and mold wall without gas bubbling,while the vortex moves downward and is near to bubbling side,far from the mold wall.In the case without Ar bubbling,the velocity of molten steel in most area at symmetrical plane in the ingot mold is lower than 0.06 m/s,while with Ar bubbling,the velocity obviously increase and is over 0.06 m/s in most area.There exists a larger region with temperature gradient,being about 80 temperature difference without Ar bubbling,while the molten steel temperature is low and homogeneous,the area with temperature gradient evidently decreases,and its temperature difference is about 40,with Ar bubbling at 0.253 m3/h flow rate.
A mathematical model of fluid flow during ingot casting with Ar bubbling was set up and fluid flow in ingot mold model and industrial mold on casting was numerically calculated,respectively.The results show that the spout height at initial casting,bubble flow shape and mixing time from numerical calculation are good agreement with those from physical modeling.The velocity of flow field in mold without gas bubbling is smaller than that with gas bubbling.The vortex is near to liquid level and mold wall without gas bubbling,while the vortex moves downward and is near to bubbling side,far from the mold wall.In the case without Ar bubbling,the velocity of molten steel in most area at symmetrical plane in the ingot mold is lower than 0.06 m/s,while with Ar bubbling,the velocity obviously increase and is over 0.06 m/s in most area.There exists a larger region with temperature gradient,being about 80 temperature difference without Ar bubbling,while the molten steel temperature is low and homogeneous,the area with temperature gradient evidently decreases,and its temperature difference is about 40,with Ar bubbling at 0.253 m3/h flow rate.
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