Abstract
This paper presents a mathematical model for solving the blending composition problem used in the zinc smelting process. The model proposes an objective function maximizing profit in terms of the total income from the sale of zinc on the market and the cost of producing zinc. In addition to the constraints contained in the basic mathematical model, the constraints, which are in accordance with the specific production process of zinc and environmental requirements, are developed. This paper proposes a model that can align three contradictory demands (technological, economic, and environmental) present in zinc production. The results, obtained by numerical experiments, confirm the assumption that it is possible to assemble such an optimal batch that will “reconcile” all contradictory demands. This model can be applied to other similar processes of production with minor changes.
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Acknowledgments
The authors gratefully acknowledge support from the Research Projects TR34023, financed by The Ministry of Education and Science of the Republic of Serbia.
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The results shown in this paper are part of the research of the TR34023 project, financed by The Ministry of Education and Science of the Republic of Serbia.
Appendix: Implementation in MATHEMATICA
Appendix: Implementation in MATHEMATICA
This section describes the mathematica code for computing values max F(x). List P defines the contents of all 19 components contained in 10 separate concentrates. The 19th concentrate component is the “miscellaneous” group.
The initial data are defined as follows:
The objective function is defined as the following:
Constraints are defined as follows:
When you have defined all the necessary parameters, it is possible to calculate the value max F(x). To obtain an optimal solution for the first numerical experiment, it is necessary to apply step A. For the second numerical experiment, step B is applied, and step C for the third.
Step A. Calculation for the first numerical experiment (only Zn):
Step B. Calculation for the second numerical experiment (Zn + S + As):
Step C. Calculation for the third numerical experiment (Zn + all elements):
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Jovanović, I., Savić, M., Živković, Ž. et al. An Linear Programming Model for Batch Optimization in the Ecological Zinc Production. Environ Model Assess 21, 455–465 (2016). https://doi.org/10.1007/s10666-015-9485-z
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DOI: https://doi.org/10.1007/s10666-015-9485-z