• Risto V Filkoski, University “Sts. Cyril and Methodius”, Faculty of Mechanical Engineering, Skopje, Macedonia
  • Ilija J Petrovski, University “Sts. Cyril and Methodius”, Faculty of Mechanical Engineering, Skopje, Macedonia
  • Margarita Ginovska, University “Sts. Cyril and Methodius”, Faculty of Electrical Engineering and Information Technologies, Skopje, Macedonia
  • Hans Borchsenius, Norsk Energi, Norway

A Case Study of Energy Recovery in Ferro-Alloys Industry

  • The process of ferrosilicon alloy production is very complex, characterised by high consumption of energy and raw materials. The main objective of the study presented in this paper was to identify some energy efficiency projects and options in a ferro-silica production company in Macedonia and to analyse their feasibility. Another important goal was to recommend further steps and to suggest which measures to focus on in the near future that would result with energy savings, environmental and financial benefits. In the analysed facility, hard coal and lignite are added as very important input materials in the chemical reduction process and as energy resources in electric arc furnaces. Due to the technology applied, large quantities of thermal energy and dust are generated in the process and released with furnaces off-gas in the air. Energy balances of the electric arc furnaces are established, showing that significant part of energy is used for the chemical reactions, but the largest share is discharged in the atmosphere, as off-gas waste heat. Technical, financial, and environmental aspects of implementation of heat recovery system have been analysed, including potential barriers and limiting factors. The main conclusion drawn from the analysis is that, under certain conditions, the potential for implementation of energy efficiency measures is significant. With waste heat recovery system, it is possible to reduce the needs for electricity purchase for about 20%. Additionally, the waste heat recovery option qualifies for clean development mechanism project, meaning that, the sale of CO2 certified emission reduction could significantly improve the profitability of the investment.
  • Keywords
    energy recovery, fero-alloys industry, clean development mechanism projects
  • Pages
    263 - 271
  • Submitted
  • Revised
  • Accepted
  • UDC
    0350-218X, 38 (2012), 1, 263-271
  • References
    • *** State Statistical Office of the Republic of Macedonia, Skopje, Energy Balances 2006, Year XLVI, Doc. No:, Skopje, 2008
    • ***, ICEIM MANU (R.V. Filkoski – member of the expert team), Skopje, Second National Communication on Climate Change under the UNFCCC, ICEIM-MANU, Skopje, 2008
    • ***, ICEIM MANU (R.V. Filkoski – member of the expert team), Skopje, GHG Abatement Analysis in Macedonia, Final report, ICEIM-MANU, Skopje, 2008
    • Filkoski, R. V., Renewable Energy Sources: GHG Emission Mitigation Potential in the SE European Countries, International Engineering Congress on Alternative Energy Applications, Kuwait, November 2-6, 2009
    • *** Integrated Pollution Prevention and Control (IPPC), Reference Document on Best Available Techniques in the Non Ferrous Metals Industries, European Commission, Sevilla, Spain, 2001
    • *** Cleaner and More Effective Industry in Macedonia, 2009-2012, Norsk Energi, Project funded by the Government of Kingdom of Norway, Oslo
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