Steel-smelting continuous casting production scheduling method for taking molten steel residency time limit into account

Abstract

The invention provides a method used for steelmaking continuous casting production scheduling, which considers the dwell time of molten steel; the invention belongs to information technology filed and relates to the application of the construction of mathematical model and the solution algorithm in schedule scheme compilation. The invention is characterized in that the method consists of a model construction module, a schedule scheme compilation module and a database system. During the model construction process, the constraint of the steelmaking continuous casting production process is considered, the dwell time of molten steel is considered especially, as normal punishment is given to the dwell time of the molten steel within the limit of the dwell time and more punishment is given to the part exceeding the limit, the waiting time of every heat is balanced, and the molten steel rhythm qualified rate is improved. The method of the invention solves the problem existing in the background technology, by adopting the single parent genetic algorithm a steelmaking continuous casting production plan which is better than any existing scheduling method can be obtained, the online adjusting times are reduced, the energy and material consumption is reduced, and the method can be applied to the steelmaking continuous casting production scheduling system in iron and steel enterprises.

Description

technical field [0001] The invention relates to a scheduling method for a mixed flow shop whose final stage is batch production, in particular to a scheduling method for steelmaking and continuous casting production considering the residence time limit of molten steel, and belongs to the field of information technology. Background technique [0002] Steelmaking and continuous casting is the core process in modern steel production. The entire production process has extremely high requirements on the temperature and time of molten steel. A typical production line generally has multiple smelting equipment, refining equipment, casting equipment and corresponding production auxiliary equipment. , Molten steel is generally cast into billets through three major processes of "smelting-refining-casting". In the production process of steelmaking and continuous casting, the residence time of molten steel is the time elapsed from the end of steelmaking to the start of pouring steel by t...

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Problems solved by technology

Other scholars have also conducted research on the production scheduling of steelmaking and continuous casting. However, through literature search, it is found that all current studies have not considered the residence time of molten steel, and the scheduling scheme obtained may have the residence time of molten steel in some furnaces. Too long is not conducive to the realization of the company's cost reduction and efficiency increase goals; and in the actual production process, it is necessary to increase the number of dynamic scheduling and continuously repair the plan, which affects the stability of the production system

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