Characterization and collaborative evaluation of material flow and energy flow in steel manufacturing process
HE Dongfeng1, HU Zhengbiao2
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China
Abstract：In the steel manufacturing process, material flows dynamically and orderly along a predetermined "process" within a specific "network" under the driving and influence of energy flows. In practical production, material flows and energy flows are coupled, interconnected, and mutually constrained, collectively maintaining the normal operation of production. Therefore, the quantitative characterization and synergistic evaluation of material and energy flows play a crucial role in achieving their harmonious coordination. Graph theory is used to abstractly describe the operational structure of mass and energy flows in the steel manufacturing process. The adjacency matrix is introduced to quantitatively characterize the operational characteristics of mass and energy flows, which includes the process path of mass flow operation, the input-output relationship of different process material flows, as well as the interrelationships between energy flow operation structure and equipment. In addition, the complex steel system is divided into two subsystems of mass and energy flows. The characteristics of steel flow program parameters are proposed, and 3 parameters such as continuity are determined as order parameters of the material flow subsystem, and 5 parameters such as the comprehensive energy consumption of tons of steel are used as the order parameters of the energy flow subsystem. The power value and entropy weight method of order parameters are used to calculate the weights of order parameters and subsystems, so as to calculate the order degree and overall system synergy of different subsystems. Finally, an analysis is conducted on a steel enterprise as an example, and the results show that in the T1-T6 period, the energy flow subsystem dominates the synergy of the system. Among them, the synergy degree of the system in T1 period is the smallest, which is 0.266, while the synergy degree of the system in T4 period is the largest, which is 0.708. The synergy of the entire system is the result of the joint action of the two subsystems.
贺东风, 胡正彪. 钢铁制造流程物质流与能量流表征与协同评价[J]. 钢铁, 2023, 58(11): 32-42.
HE Dongfeng, HU Zhengbiao. Characterization and collaborative evaluation of material flow and energy flow in steel manufacturing process[J]. Iron and Steel, 2023, 58(11): 32-42.
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