Optimization strategies of steel strip continuous heat treatment based on feasible sets
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摘要: 在帶鋼連續熱處理熱過程機理數學模型的基礎上,提出了帶鋼連續熱處理過程中的穩定工況和變工況過程的優化策略.根據穩定工況過程的啟發式優化策略,得到了各鋼簇(由鋼種、規格確定)的可行工況集,基于各鋼簇可行工況集之間的關系,研究開發了變工況條件下帶鋼連續熱處理過程優化控制策略.該策略通過調整機組的操作參數,使得帶鋼溫度與熱處理目標溫度之間的誤差最小.通過對現場實際采用的變工況控制策略與本文開發的策略的對比分析表明,基于可行工況集的變工況策略可以在更短時間內實現變工況過程,更精準地控制變工況期間的帶鋼溫度.Abstract: Based on the heat transfer model, optimization strategies were proposed for the steady and transition operating modes during steel strip continuous heat treatment processes. Feasible sets for every steel group (classed by steel grade and size) can be obtained by a heuristic optimization strategy in the steady operating mode. Based on the relations of feasible sets of different steel groups, an optimization strategy for the transition operating mode was developed, which minimized the differences between the steel strip temperature and target temperature of heat treatment by the adjustment of operating parameters. A comparison between the control strategy used in steelmaking plants and the new developed shows that the optimization strategy based on feasible sets can fulfill the transition operating mode more rapidly and control the temperature of steel strips more accurately.
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Key words:
- steel strips /
- heat treatment /
- working procedure /
- optimization /
- feasible sets
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