Study on the Initial Formation Behavior of Argon Bubbles in Porous Permeable Brick in Tundishes
Study on the Initial Formation Behavior of Argon Bubbles in Porous Permeable Brick in Tundishes
复制标题
中间包多孔透水砖中氩气泡初始形成行为的研究
DOI：
10.1007/s11663-021-02404-2
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发表时间：
2022-01
期刊：
影响因子：
--
通讯作者：
Yan Jin
中科院分区：
文献类型：
--
作者：
Xufeng Qin;Changgui Cheng;Yang Li;Weili Wu;Yan Jin
多孔透气砖具有透气性好、成泡稳定性好、耐火性能好等优点，在中间包吹氩工艺中得到了广泛的应用。本文采用颗粒堆积法制备了不同骨料临界粒径的多孔透水砖。通过对多孔透水砖微观结构的表征，利用水模型实验分析了多孔透水砖中气泡的生成行为和气泡尺寸分布。基于灰色系统理论，研究了活化孔数和气泡尺寸与孔结构参数和压力梯度的相关性。结果表明，当气体流量较低时，气泡群中气泡尺寸呈双峰或多峰分布。随着气体流量的增加，多孔透气砖内部的压力梯度和活化孔的数量增加。同时，气泡的尺寸范围增加，并改变为正态分布。具有小的临界骨料尺寸的多孔透水砖可以产生许多小气泡。在所考虑的参数中，透气性直接影响多孔透水砖内部的压力梯度，并与活化孔数的相关系数最大。孔径分布是影响气泡群尺寸分布和索特平均直径（SMD）的关键因素。
Porous permeable bricks have been widely used in the process of argon bubbling in tundishes due to their gas permeability, stable bubble formation ability and their refractory performance. In this article, the particle packing method was used to prepare porous permeable bricks with different critical sizes of the aggregate particles. Through characterization of the porous permeable brick microstructure, the bubble formation behaviors and bubble size distributions from the porous permeable bricks were analyzed by water model experiments. Correlations of the number of activated pores and the bubble size with the pore structure parameters and pressure gradient were then studied based on a gray system theory approach. The results showed that when the gas flow rate was low, the sizes of the bubbles in a bubble group presented a bimodal or multimodal distribution. As the gas flow rate increased, the pressure gradient inside the porous permeable bricks and the number of activated pores increased. Simultaneously, the size range of the bubbles increased and changed to a normal distribution. Porous permeable bricks with small critical aggregate sizes can produce many small bubbles. Among the parameters considered, the gas permeability directly affected the pressure gradient inside the porous permeable bricks and had the maximum correlation coefficient with the number of activated pores. The pore size distribution was the key factor affecting the size distribution and Sauter mean diameter (SMD) of a bubble group.
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影响因子：
8.4
作者：
Joseph W. K. Chan;T. L. Tong
通讯作者：
Joseph W. K. Chan;T. L. Tong
影响因子：
2.2
作者：
Sheng Chang;S. Ge;Z. Zou;M. Isac;R. Guthrie
通讯作者：
Sheng Chang;S. Ge;Z. Zou;M. Isac;R. Guthrie
超厚板坯连铸中间包堰及气幕水力学及数学模拟
DOI：
10.1007/s11663-013-9941-6
发表时间：
2014-04-01
影响因子：
3
作者：
Chen, Dengfu;Xie, Xin;Liao, Qi
通讯作者：
Liao, Qi
DOI：
10.1002/srin.199905630
发表时间：
1999-06
期刊：
Steel Research
影响因子：
--
作者：
S. C. Koria;S. Srivastava
通讯作者：
S. C. Koria;S. Srivastava
DOI：
10.1007/s11663-016-0776-9
发表时间：
2016-08
期刊：
Metallurgical and Materials Transactions B
影响因子：
--
作者：
Ningzhen Wang;Xiang Chen;Jianyu Yuan;Guiquan Wang;Yanxiang Li;Huawei Zhang;Yuan Liu
通讯作者：
Ningzhen Wang;Xiang Chen;Jianyu Yuan;Guiquan Wang;Yanxiang Li;Huawei Zhang;Yuan Liu