某一转炉或精炼炉故障下炼钢-连铸生产重调度方法及应用

炼钢-连铸生产中会出现某一台转炉或精炼炉故障, 目前已有的重调度方法没有考虑多重精炼或只进行了仿真研究, 难以有效应用到具有多重精炼的钢厂, 而采用人工调整方式则容易导致炉次等待时间过长或断浇. 为此,通过引入炉次生产状态参数, 建立0-1 混合整数规划重调度模型, 提出由“未加工”炉次的设备指派、“未加工”炉次的开工时间优化和浇铸时间调整3 部分组成的重调度方法. 将该方法应用于某钢铁厂炼钢-连铸生产调度过程的实际工程应用验证了所提出方法的有效性.

Rescheduling method of steelmaking and continuous casting with breakdown of converter or refining furnace

A converter or refining furnace failure upsets the plan in steelmaking-continuous casting(SCC) production, which makes the production plan infeasible. The existing methods for the SCC rescheduling do not consider multiple refining, but a simulation study, which can not be applied effectively to multi-refining steelmaking scheduling. Therefore, manual scheduling is taken to tackle the problem, which often results in the unacceptable waiting time between different facilities and breaking casting. By introducing status parameter of charges, the 0-1 mixed integer programming rescheduling model is established. A method is presented for the rescheduling problems, which includes three steps. Step one determines the allocation machines(converters and refining furnaces) for the unperformed charges. Step two determines the start time of unperformed charge on the converter, refining furnace and caster. Step three adjusts the start time of unperformed charge and performing charge on caster within a limited range. The dynamic scheduling system for SCC with the rescheduling method has been successfully applied to some steel plant, and its effectiveness is verified.