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Generating of Electric Energy by a Declined Overburden Conveyor in a Continuous Surface Mine

Author

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  • Witold Kawalec

    (Faculty of Geoengineering, Mining and Geology, Department of Mining, Wroclaw University of Science and Technology, Na Grobli 15, 50-421 Wroclaw, Poland)

  • Robert Król

    (Faculty of Geoengineering, Mining and Geology, Department of Mining, Wroclaw University of Science and Technology, Na Grobli 15, 50-421 Wroclaw, Poland)

Abstract

Exploitation of lignite in continuous surface mines requires removing masses of overburden, which are hauled to a dumpsite. There are some technological arrangements where the overburden is transported several dozen meters down to a spreader operating on a lower located dumping level. Depending on an angle of a declined transportation route, there is a possibility to convert the potential gravitational energy of conveyed down overburden masses into electric energy. To recover the maximum percentage of stored energy, an energy-effective and fully loaded belt conveyor should work in a generator mode. Due to the implementation of such a solution, a lignite continuous surface mine, which is a great electric energy consumer, can obtain the status of an electricity prosumer and reduce its environmental impact, in particular demonstrating significant savings in primary energy consumption. Though lignite surface mining is phasing out in Europe, the recuperative, overburden conveyors for downhill transport match up the targets of sustainable mining, understood as getting the maximum benefits from the exploited natural resources. According to the analyzed case study, an investment into the installation of regenerative inverters for the electric power supply of the declined overburden conveyor would pay off within 3–4 years.

Suggested Citation

  • Witold Kawalec & Robert Król, 2021. "Generating of Electric Energy by a Declined Overburden Conveyor in a Continuous Surface Mine," Energies, MDPI, vol. 14(13), pages 1-11, July.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:13:p:4030-:d:588277
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    References listed on IDEAS

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    1. Justyna Woźniak & Katarzyna Pactwa, 2018. "Responsible Mining—The Impact of the Mining Industry in Poland on the Quality of Atmospheric Air," Sustainability, MDPI, vol. 10(4), pages 1-16, April.
    2. Witold Kawalec & Robert Król & Natalia Suchorab, 2020. "Regenerative Belt Conveyor versus Haul Truck-Based Transport: Polish Open-Pit Mines Facing Sustainable Development Challenges," Sustainability, MDPI, vol. 12(21), pages 1-15, November.
    3. He, Daijie & Pang, Yusong & Lodewijks, Gabriel, 2017. "Green operations of belt conveyors by means of speed control," Applied Energy, Elsevier, vol. 188(C), pages 330-341.
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    Cited by:

    1. Krzysztof Czajka & Witold Kawalec & Robert Król & Izabela Sówka, 2022. "Modelling and Calculation of Raw Material Industry," Energies, MDPI, vol. 15(14), pages 1-6, July.
    2. Pihnastyi, Oleh & Burduk, Anna, 2022. "Analysis of a Dataset for Modeling a Transport Conveyor," MPRA Paper 116161, University Library of Munich, Germany, revised 26 Nov 2022.
    3. Mirosław Bajda & Monika Hardygóra, 2021. "Analysis of the Influence of the Type of Belt on the Energy Consumption of Transport Processes in a Belt Conveyor," Energies, MDPI, vol. 14(19), pages 1-17, September.
    4. Zbigniew Krysa & Przemysław Bodziony & Michał Patyk, 2021. "Discrete Simulations in Analyzing the Effectiveness of Raw Materials Transportation during Extraction of Low-Quality Deposits," Energies, MDPI, vol. 14(18), pages 1-19, September.

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