Multi-target optimization method for casting sequence selection, ranking and casting time policy of continuous casting machine

Abstract

The present invention provides a multi-target optimization method for casting sequence selection, ranking and a casting time policy of a continuous casting machine. The method includes the following steps of establishing a multi-target optimization model, wherein the multi-target optimization model takes minimum total punishment, accumulated metal on the production line and non-effective use amount of high-quality molten iron of production batch plan execution conditions of a steel plant as a target function, and the multi-target optimization model is formed by constraint equations of related processing requirements; acquiring a production batch plan of the steel plant, coding based on casting sequence selection and performing population initialization; decoding based on a main constraint satisfaction method, calculating an adaptability value, and acquiring an initial solution set; performing non-dominated ranking and crowding distance ranking; selecting some individuals in the population as parents; performing crossing and variation on the parents; decoding a calculation result and calculating adaptability; determining an elitist solution set, and calculating a crowding distance and ranking; and outputting the elitist solution set, selecting the most satisfied scheme and transmitting the most satisfied scheme to a steelmaking-continuous casting production operating control system. Through adoption of the multi-target optimization method, a furnace casting period of continuous casting production is controlled stably, the algorithm efficiency is better than that of a traditional non-dominated ranking genetic algorithm and a strength pareto evolutionary algorithm.

Description

technical field [0001] The invention relates to the technical field of iron and steel production control, in particular to a multi-objective optimization method for selection, sorting and decision-making of pouring times of a continuous casting unit. Background technique [0002] In the continuous casting production, the composition of furnaces to be started and the decision-making time of the casting time are not only the problem of determining the specific casting operation plan of the continuous casting machine, but also the premise of formulating a reasonable steelmaking and continuous casting production operation plan. The core task is to start from the batch Select the appropriate heats in the planning pre-selection pool as the selected heats in the continuous casting machine to be poured during the planning period (including furnace selection and sorting), and determine whether continuous casting between each heat and the start-up time. At present, in response to this...

AI Technical Summary

Problems solved by technology

However, due to the lack of understanding of the importance of this type of problem, and the difficulty of modeling and solving, the scheduler is determined by manual experience in production practice, which brings a lot of uncertainty to production and affects The realization of the production goal of "orderly, stable and efficient"

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