Two-dimensional heat transfer model for secondary cooling of continuously cast beam blanks

作者：Zhao Y; Chen D F^*; Long M J; Shen J L; Qin R S

来源：Ironmaking and Steelmaking, 2014, 41(5): 377-386.

DOI：10.1179/1743281213Y.0000000164

• Heat transfer
• Beam blank continuous casting
• Finite element
• Secondary cooling process
• Cooling boundary conditions
• Water flow density distribution
• Transverse nozzle layout

A two-dimensional heat transfer model was developed for the secondary cooling system during beam blank continuous casting. The finite element method was used to calculate the heat transfer. Accurate cooling boundary conditions in the secondary cooling zone are involved, including spray water cooling, water evaporation cooling, radiation cooling and roll contact cooling in the casting direction and non-uniform distribution of spray water flow density in the cross-section. The causes of longitudinal crack at the fillet during Q235 steel continuous casting were analysed on the basis of the simulation of the developed model, and then the spray water flow and the transverse nozzle layout were optimised. Practical results show that the surface quality of the beam blank improved after optimisations. Numerical results from the present model were validated using previous experimental measurements, which show good agreement.

• 出版日期2014-6
• 单位重庆大学