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Using column generation to solve a coal blending problem

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  • AURAY, Stéphane
  • DE WOLF, Daniel
  • SMEERS, Yves

Abstract

In this paper, we formulate and solve a real life coal blending problem using a Column Generation Approach. The objective of the model is to prescribe optimal mixes of coal to produce coke. The problem is formulated as a mixed integer program. It involves various types of constraints arising from technical considerations of the blending process. The model also incorporates nonlinear constraints. It results in a large-scale problem that cannot be solved by classical operations research methods. Defining three heuristic methods based on column generation techniques, this paper proposes reasonable solutions for the industry.
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Suggested Citation

  • AURAY, Stéphane & DE WOLF, Daniel & SMEERS, Yves, 2015. "Using column generation to solve a coal blending problem," LIDAM Reprints CORE 2713, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    • Handle: RePEc:cor:louvrp:2713
    Note: In : RAIRO Operations Research, 49, 2015, p. 15-27
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