Rolling scheduling of reheating furnaces in steel production when some furnaces may not be available at times

QIAN Peng; WU Cheng; SONG Shiji; DING Jianya

doi:10.16511/j.cnki.qhdxxb.2020.26.036

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Journal of Tsinghua University(Science and Technology) ›› 2021, Vol. 61 ›› Issue (10) : 1166-1176. DOI: 10.16511/j.cnki.qhdxxb.2020.26.036

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Rolling scheduling of reheating furnaces in steel production when some furnaces may not be available at times

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Abstract

A model is presented here for scheduling of reheating furnaces that are used after continuous casting and before hot-rolling when some of the furnaces may not be available at certain times which leads to constraints on the scheduling. The constraints that occur in actual production lines are modeled in a mixed-integer programming model to minimize the combined costs of the adjusted schedule, select the transport path for each job and determine the furnace allocations. A heuristic algorithm for rolling scheduling is used to update the model and decompose the problem with partial reuse of existing results to improve the dynamic scheduling efficiency. Simulations show that the algorithm can provide real-time and effective scheduling.

Key words

reheating furnace / temperature holding pit / machine non-availability / rolling scheduling / mixed-integer programming

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QIAN Peng, WU Cheng, SONG Shiji, DING Jianya. Rolling scheduling of reheating furnaces in steel production when some furnaces may not be available at times[J]. Journal of Tsinghua University(Science and Technology). 2021, 61(10): 1166-1176 https://doi.org/10.16511/j.cnki.qhdxxb.2020.26.036

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