一种有利于提高DHCR比例的热轧批量计划编制方法

Hot-rolling batch planning method available to improve DHCR proportion

针对一体化生产过程中连铸出坯顺序与热轧轧制顺序的协调问题,提出了计划顺序协调因子,并在此基础上建立了有利于提高直接热装(DHCR)比例的热轧批量计划优化模型.模型在满足热轧轧制工艺的基础上充分考虑了铸坯连铸出坯计划与热轧轧制计划的协调.采用改进遗传算法——两交换启发交叉算法对模型进行了求解.最后,针对大批量少品种和小批量多品种两组板坯对某钢厂2250 mm和1580 mm轧线进行了仿真,仿真结果表明模型可以大大减少铸坯因顺序不协调而引起的在进入加热炉前的等待时间,进而提高板坯DHCR比例.

Acoordination factor for the sequence of plans was proposed aimed to coordinating the casting production plan with the hot rolling production plan in an integrated production process.An optimization model of the hot-rolling batch plan available to improve the direct hot charging rolling（DHCR） proportion was established.On the basis of meeting the requirements of the hot rolling process,the model considers well the coordination of the casting production plan and the hot rolling production plan.A modified genetic algorithm,the two-exchange crossover heuristic algorithm,was used to solve the model.Finally,two slab groups which are large batch quantity with seldom types and small batch quantity with multiple types were simulated in the 2 250 mm hot rolling line and the 1 580 mm hot rolling line in a steel plant.The results show that the model could greatly reduce the waiting time of slabs caused by the casting slab sequence conflicts before entering the reheating furnace,and the DHCR proportion is increased correspondingly.