Optimization of Integrated Scheduling of Heating and Rolling in Steel-making Processes

To optimize the integrated scheduling of rolling stage of steel-making production with the collaborative process requirements of heating stage, the effect of heating time of slabs in heating stage and variation of slab specifications and completion time in rolling stage should be essentially considered. In this paper, an optimization model of integrated scheduling of heating and rolling processes in steel-making production is established, and the algorithm solving the model is designed and implemented by CPLEX optimizer. The computational experiments are conducted based on the simulated production data, a variety of comparative experiments of various problem scales are designed to verify the effectiveness of the model. Furthermore, the influence of slab parameters in heating and rolling scales with respect to solution efficiency and quality was analyzed.