Dynamic scheduling for steelmaking and continuous casting based on the programming model with varying constraints
基于变约束规划模型的炼钢连铸动态调度

In deal with the disturbances in the production of steelmaking and continuous casting, the manual scheduling responses slowly and gives un-optimal results. After examining various patterns of manual adjustment of schedule against the disturbances, we propose a non-linear programming model for online dynamic scheduling, in which the required adjustment is realized by changing the constraints. The model is solved by converting it into a linear programming model. This method has been applied to a large steel plant; resulting in an efficient reduction of the dynamic scheduling time and the redundant waiting time for molten steel, and an improvement of the load ratio of facilities.