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Indexed by:期刊论文

Date of Publication:2009-06-01

Journal:CONTROL ENGINEERING PRACTICE

Included Journals:SCIE、EI

Volume:17

Issue:6

Page Number:629-641

ISSN No.:0967-0661

Key Words:Hot rolling production scheduling; Vehicle routing problem with time windows; Heuristics; Intelligent search algorithms

Abstract:Hot rolling scheduling is a difficult problem in the steel processing industry. It involves many objectives and constraints in both technical and practical respects. A two-stage scheduling method is proposed in this paper. Batch planning of staple material is formulated as a VRPTW, which is solved with a modified PGA. Then, batches of the established units are optimized by adjusting rolling sequences using intelligent search algorithms to reach higher hot charge ratios. This method has been applied to a hot strip mill belonging to Baosteel in China. Our results demonstrate that the proposed technique can improve production efficiency and offer significant economic benefits. (C) 2008 Elsevier Ltd. All rights reserved.