带钢水不确定性约束的连铸机故障的炼钢-连铸动态调度

Steelmaking and Continuous Casting Dynamic Scheduling of Continuous Caster Faults with Molten Steel Uncertainty Constraints

在炼钢-连铸(SCC)生产过程中,最普遍的干扰就是连铸机的故障。现有连铸机故障的重分配模式缺乏对钢水不确定性的考虑,因此本文针对该问题,建立了考虑钢水等级及温度、因钢水不确定性导致的中间包寿命限制的调度模型。为在可承受计算时间内得到更高效率的解决方案,我们根据问题特点设计优化了NSGA-II算法,基于炉次状态设计多层编码,引入炉次重分配规则得到可行解。最后,在实际的生产数据上进行计算。实验表明,提出的炉次重分配规则对考虑钢水不确定性的连铸机故障的炼钢-连铸动态排产是有效的。

The most common disturbance in the steelmaking-continuous casting(SCC) process is the failure of the continuous caster.The existing redistribution model for continuous caster failures lacks consideration of steel uncertainty, so this paper addresses this problem by developing a scheduling model that takes into account the steel grade and temperature, and the lifetime limitations of the intermediate ladle due to steel uncertainty. In order to obtain a more efficient solution within a tolerable computation time, the NSGA-II algorithm is designed and optimized according to the characteristics of the problem, a multi-layer code is designed based on the furnace states, and furnace redistribution rules are introduced to obtain a feasible solution. Finally, the calculations are carried out on actual production data.The experiments show that the proposed furnace redistribution rule is effective for dynamic steelmaking-continuous casting scheduling considering steel uncertainty for continuous caster failures.