摘要
钢铁企业产品制造流程的铁素物质流运行优化是实现节能降耗、降本增效的重要手段。针对当前钢铁行业“能耗”与“能效”概念混用,以吨钢能耗、工序能耗为基础的评价指标不能区分不同产品与流程差异等问题,提出了以阶段产品为基准的钢铁产品制造过程与流程能效的评价方法,用于量化铁素物质流与能量流的动态耦合关系。提出“过程有效能”概念,将其定义为在流程各工序设备的冶金过程中,铁素物质流携带的能量流为达成冶金目标的单位产品产出所获取的能量与过程回收可再利用的能量之和。过程能效为有效能除以进入过程所带入的能量和供给总能量,以此来描述铁素物质流经历各工序冶金过程的能量转换与利用效果。通过分析多工序物质流与能量流的输入输出关系,结合冶金过程特征,构建了化学冶金(转炉、精炼等)、物理冶金(连铸凝固等)过程能效的计算模型,并给出工序界面能效和流程能效的计算方法。通过多工序物质流与能量流的输入输出分析,结合热力学平衡关系,实现了从工序到全流程的能效动态追踪。以中国某转炉炼钢厂相关生产数据为例,量化分析了不同工艺路径、冶金设备及产品的能效差异。研究表明,基于铁素物质流运行特征的能效评价方法可为钢铁企业优化工艺控制与路径选择、实施生产动态运行优化及节能降碳提供决策依据。
Optimization of the ferruginous mass flow operation within the steel manufacturing process is a critical approach to achieving energy conservation,cost reduction,and efficiency enhancement.Addressing the prevailing confusion in the steel industry between the concepts of"energy consumption"and"energy efficiency",where evaluation metrics based on energy consumption per ton of steel or per procedure fail to account for differences across products and process paths,an evaluation method for energy efficiency in the steel product manufacturing process and its workflows were proposed.This method used intermediate products as a benchmark to quantify the dynamic coupling relationship between the ferruginous mass flow and energy flow.The concept of"process effective energy"was introduced,defined as the sum of the energy acquired to produce a unit of product meeting metallurgical targets and the reusable energy recovered from the process,within the metallurgical operations of each procedure through which the energy flow carried by the ferruginous mass flow passes.Process energy efficiency was calculated as the ratio of effective energy to the total energy input and supplied to the process,thereby characterizing the energy conversion and utilization effectiveness of the ferruginous mass flow across the metallurgical processes of each procedure.By analyzing the input-output relationships of mass flow and energy flow in multi-procedure operations,combined with the characteristics of metallurgical processes,computational models were developed for the energy efficiency of chemical metallurgical processes(converter and refining)and physical metallurgical processes(continuous casting solidification),alongside methods for calculating interface energy efficiency between procedures and overall process energy efficiency.Through the input-output analysis of mass flow and energy flow across multiple procedures,combined with thermodynamic equilibrium relationships,dynamic tracking of energy efficiency from individual procedures to the entire process was achieved.Using production data from a specific converter steel plant in China as a case study,the energy efficiency variations across different process paths,metallurgical equipment,and products were quantitatively analyzed.The results demonstrate that the energy efficiency evaluation method based on the operational characteristics of the ferruginous mass flow provides a decision-making foundation for steel enterprises to optimize process control and path selection,implement dynamic operation optimization in production,and achieve energy saving and carbon reduction.
作者
郑忠
杨永杰
张开天
杨治朋
王永周
陈素君
刘雪莹
ZHENG Zhong;YANG Yongjie;ZHANG Kaitian;YANG Zhipeng;WANG Yongzhou;CHEN Sujun;LIU Xueying(School of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;Intelligent Manufacturing Division,CISDI Chongqing Information Technology Co.,Ltd.,Chongqing 401147,China;Ministry of Energy and Environment,Shougang Jingtang Iron and Steel Co.,Ltd.,Tangshan 063210,Hebei,China;Digital Intelligent Operation Department,Shougang Jingtang Iron and Steel Co.,Ltd.,Tangshan 063210,Hebei,China)
出处
《钢铁》
北大核心
2025年第7期180-192,共13页
Iron and Steel
基金
国家自然科学基金资助项目(52334008,51734004)。
关键词
钢铁制造流程
物质流
能量流
运行优化
化学冶金与物理冶金
过程能效
流程能效
节能降碳
steel manufacturing process
mass flow
energy flow
operation optimization
chemical metallurgy and physical metallurgy
process energy efficiency
overall process energy efficiency
energy saving and carbon reduction
