3D numerical investigation of effects of density and surface tension on mixing time in bottom-blown gas-stirred ladles

作     者：Matin GHADIMI REZAEI Pooyan HASHEMI TARI Mohammad EMAMZADEH Leili TAFAGHODI KHAJAVI Matin GHADIMI REZAEI;Pooyan HASHEMI TARI;Mohammad EMAMZADEH;Leili TAFAGHODI KHAJAVI

作者机构：Mechanical Engineering DepartmentShahid Beheshti UniversityTehran16589-53571Iran Material Science and Engineering DepartmentMcMaster UniversityHamilton L8S 4L7Canada 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2021年第31卷第10期

页      面：3177-3191页

核心收录：

学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 

主　　题：gas-stirred ladle mixing time density surface tension tracer concentration numerical simulation 

摘      要：In molten phase metallurgical processes,mixing via gas injection has a vital role in obtaining a homogeneous *** efficiency of mixing depends on operational variables such as gas flow rate and slag height as well as physical properties of the molten phases.A numerical simulation is conducted to study the above parameters in the flow behavior of a bottom-blown *** molten metal and the slag are modeled by water and oil,*** numerical results,particularly the mixing time,are validated against experimental *** results show that mixing time increases as the slag height increases and decreases as the density of the slag material *** mixing time decreases with an increase in the density of the primary phase;however,it increases as the surface tension between air and water increases.A case with properties close to a real molten metal is also *** performance of the system is influenced by the momentum rather than the dissipative ***,the effect of the density of the molten phase on the mixing process is more pronounced compared to the effect of the surface tension between the air and the molten phase.