考虑铸轧协调的炼钢-连铸-热轧一体化生产计划

Integrated production planning of steelmaking-continuous casting-hot rolling considering coordination between casting and rolling

炼钢-连铸-热轧生产计划编制是一个多目标、多约束的复杂组合优化问题。从有利于多工序生产组织的角度,提出了一种可分工序独立编制工序计划,并且按铸轧衔接关系进行系统协调的一体化生产计划编制方法。即首先以铸坯作为热轧与炼钢-连铸不同工序生产阶段统一的生产计划对象,并将炼钢、连铸与热轧的生产目标和约束进行归类抽象,使得炼钢炉次计划、连铸浇次计划和热轧单元计划的制定模型具有内在的逻辑相关性;以缩小铸轧时间差作为铸轧界面衔接关系的协调控制目标,来优化连铸与热轧之间的生产衔接,进而获得一体化生产计划。采用某钢厂的生产订单数据和生产计划目标、约束条件,通过模型仿真计算与生产实绩数据的对比检验了该一体化生产计划编制方法的有效性。

Integrated production planning of steelmaking-continuous casting-hot rolling is a complex combinatorial optimization problem with multi-objectives and multi-constraints.From the perspective of facilitating a multi-process production organization,an integrated production planning strategy that is planned separately by sub-process and coordinated by casting and rolling is proposed.From the strategy,charge plan,casting plan,and hot rolling plan are respectively made according to the production targets and constraints of steel-making,continuous casting and hot rolling with the slab as the basic unit.Then,the casting and rolling coordination optimization is carried out to obtain an integrated production plan from the casting and rolling connection relationship.In the coordination of casting and rolling,the goal of reducing the time difference between casting and rolling,which would increase the hot charging ratio,is used to optimize and coordinate the interface between continuous casting and hot rolling.According to the production order data,production plan objectives,and constraints of a steel plant,the effectiveness of the integrated production planning method is verified by comparing model simulation calculation and production performance data.