| As an economic section steel,H-beam is more and more widely used in social production due to its excellent properties.Continuous casting beam blank is used as rolling billet for H-beam.Due to the complicated sectional shape,the thermal process mechanism in the heating furnace is more difficult to analyze.Therefore,there are few reports on the research of the hot process of the billet.Systematic research on the hot process of the billet is of great significance to improve the heating quality,optimize the design of the billet heating furnace,and achieve energy saving and emission reduction.Based on it,this research will focus on the study of the thermal process in the furnace of the beam blank.Based on the analysis of the heat transfer in the beam blank furnace,the mathematical model of the two-dimensional section method of the beam blank heating furnace is established.According to the applicability of Monte Carlo method to irregular geometries,this paper improves the traditional Monte Carlo method(MCM)and proposes an improved Monte Carlo method(IMCM)with higher computational efficiency and applies it to the solution of total radiative exchange area.The beam blank is meshed by non-uniform mesh and local triangular mesh respectively,and the finite difference method is used to solve the slab heat conduction equation discretely.Taking the surface heat flow of the billet as the coupling condition,the piecewise model is solved iteratively by the principal variable correction method,and the temperature field in the furnace is obtained.The results are verified by field data of a steel plant under typical working conditions.The effects of productivity,soaking section length,air consumption coefficient,preheating temperature,furnace height and blackness on the hot process of beam blank were quantitatively analyzed.The results of this study can provide a theoretical reference for the design and manufacture of beam blank heating furnace and the hot process of beam blank production. |
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