Abstract：Based on a physical modeling of argon-stirred refining ladle，the effect of argon flow rate on the removal of non-metallic inclusions and its removal mechanism were studied. The results indicated that the floatation of inclusions to the steel-slag interface was mainly due to the rising movement of liquid steel. Argon blowing rate was one of the most important factors to remove inclusions at the steel-slag interface. When the argon flow rate was relatively low，inclusions would be absorbed at the steady steel-slag interface with the help of buoyancy force and other forces. With the increase of argon flow rate，a fluctuant steel-slag interface occurred，and some slag droplets were entrapped into steel close to the open eye. Some inclusions would be captured by these slag droplets and then float up into top slag. When the gas flow rate was high enough，some slag droplets containing some gas bubbles formed. inclusions were captured by these slag bubbles and then removed into top slag as well. When the gas flow rate increased to a certain value，the absorption of inclusions at the steel-slag interface became the controlling step of inclusion removal，and the removal result became worse. The results of present study could provide a guidance for the control of argon flow during industrial refining process.
收稿日期: 2015-08-13
出版日期: 2016-06-06
引用本文:
周业连，朱苗勇，刘建斌，陈晶晶，郑淑国. 吹氩精炼钢包内非金属夹杂物去除机理[J]. 钢铁, 2016, 51(6): 39-46.
ZHOU Ye-lian，ZHU Miao-yong，LIU Jian-bin，CHEN Jing-jing，ZHENG Shu-guo. Mechanism of nonmetallic inclusion removal in argon-stirred refining ladles. Iron and Steel, 2016, 51(6): 39-46.
Yang H L, He P, Zhai Y C.Removal behavior of inclusions in molten steel by bubble wake flow based on water model experiment[J].ISIJ International,2014,54(3):578-581
[4]
Yang H L, He P, Zhai Y C.Removal behavior of inclusions in molten steel by bubble wake flow based on water model experiment[J].ISIJ International,2014,54(3):578-581
[5]
Wang L, Hae-Geon L E, Hayes P.Prediction of the optimum bubble size for inclusion removal from molten steel by flotation[J].ISIJ International,1996,36(1):7-16
[5]
Wang L, Hae-Geon L E, Hayes P.Prediction of the optimum bubble size for inclusion removal from molten steel by flotation[J].ISIJ International,1996,36(1):7-16
[6]
Murthy G G K, Ghosh A, Mehrotra S P.Characterization of two-phase axisymmetric plume in a gas stirred liquid bath–A water model study[J].Metallurgical and Materials Transactions B,1988,19(6):885-892
[6]
Murthy G G K, Ghosh A, Mehrotra S P.Characterization of two-phase axisymmetric plume in a gas stirred liquid bath–A water model study[J].Metallurgical and Materials Transactions B,1988,19(6):885-892
[7]
Sahai Y, Guthrie R I L.Hydrodynamics of gas stirred melts: Part I. Gas-liquid coupling[J]. Metallurgical and Materials Transactions B,1982,13(2):193-202
[7]
Sahai Y, Guthrie R I L.Hydrodynamics of gas stirred melts: Part I. Gas-liquid coupling[J]. Metallurgical and Materials Transactions B,1982,13(2):193-202
[8]
Tse-Chiang H, Lehner T, Kjellberg B.Fluid flow in ladles–experimental results[J]. Scandinavian Journal of Metallurgy, 1980, 9(3): 105-110
[8]
Tse-Chiang H, Lehner T, Kjellberg B.Fluid flow in ladles–experimental results[J]. Scandinavian Journal of Metallurgy, 1980, 9(3): 105-110
[9]
S?der M, J?nsson P, Alexis J.Most relevant mechanisms of inclusion growth in an induction–stirred ladle[J]. Scandinavian Journal of Metallurgy, 2002, 31(3): 210-220
[9]
S?der M, J?nsson P, Alexis J.Most relevant mechanisms of inclusion growth in an induction–stirred ladle[J]. Scandinavian Journal of Metallurgy, 2002, 31(3): 210-220
[10]
Ek M, Wu L, Valentin P, et al.Effect of inert gas flow rate on homogenization and inclusion removal in a gas stirred ladle[J]. Steel Research International, 2010, 81(12): 1056-1063
[10]
Ek M, Wu L, Valentin P, et al.Effect of inert gas flow rate on homogenization and inclusion removal in a gas stirred ladle[J]. Steel Research International, 2010, 81(12): 1056-1063
[11]
Cho J S, Lee H G.Cold model study on inclusion removal from liquid steel using fine gas bubbles[J]. ISIJ International, 2001, 41(2): 151-157
[11]
Cho J S, Lee H G.Cold model study on inclusion removal from liquid steel using fine gas bubbles[J]. ISIJ International, 2001, 41(2): 151-157
[12]
Valdez M, Shannon G S, Sridhar S.The ability of slags to absorb solid oxide inclusion[J]. ISIJ International, 2006, 46(3): 450-457
[12]
Valdez M, Shannon G S, Sridhar S.The ability of slags to absorb solid oxide inclusion[J]. ISIJ International, 2006, 46(3): 450-457
[13]
Mazumdar D.On the estimation of plume rise velocity in gas-stirred ladles[J]. Metallurgical and Materials Transactions B, 2002, 33(6): 937-941
[13]
Mazumdar D.On the estimation of plume rise velocity in gas-stirred ladles[J]. Metallurgical and Materials Transactions B, 2002, 33(6): 937-941
Strandh J, Nakajima K, Eriksson R, et al.A mathematical model to study liquid inclusion behavior at the steel-slag interface[J]. ISIJ international, 2005, 45(12): 1838-1847
[15]
Strandh J, Nakajima K, Eriksson R, et al.A mathematical model to study liquid inclusion behavior at the steel-slag interface[J]. ISIJ international, 2005, 45(12): 1838-1847
[16]
Shannon G N, Sridhar S.Modeling Al2O3 inclusion separation across steel–slag interfaces[J].Scandinavian Journal of Metallurgy, 2005, 36(6): 353-362
[16]
Shannon G N, Sridhar S.Modeling Al2O3 inclusion separation across steel–slag interfaces[J].Scandinavian Journal of Metallurgy, 2005, 36(6): 353-362
2016, Vol. 51 
