Article ID: ISIJINT-2019-799
Based on the theory of heat transfer, parametric modeling is established for the heat transfer model of copper cooling stave, which appears in recent years, with special-shaped tubes (elliptical, rectangular, double circular, three circular and ortho hexagonal) in a blast furnace (BF) bosh and the optimal tube for the cooling pipe is selected on the basis of the heat transfer characteristics of the stave. The heat transfer model of the hot end of stave embedded bricks which are not covered by slag, is analyzed using thermal-structural coupling method at the initial stage of blow-in under the normal working condition. The mutual influence of various parameters on the mechanical properties of copper stave is obtained using the response surface method. This method is combined with NSGA-II genetic algorithm to optimize the structure parameters and longevity technology of the bosh. The optimized structure of the furnace bosh is improved in heat transfer characteristics and mechanical properties, which proves the model and parameterized calculation program can be used as an optimized design and evaluation of the longevity technology of the bosh structure.