Design of a Water-Cooling System for the Inside Roof of 20t Electric Arc Furnace for Oxygen Blow Decarburization Using CFD Analysis


Year : 2024 | Volume : 11 | Issue : 03 | Page : 11-17
    By

    Chung-Hyok Oh,

  • Kwang-Hyok Song,

  • Song-Hua Chon,

  • Jong-Mun Rim,

  • Song-Il Ra,

  1. Student,, Department of Metal engineering, Kim Chaek University of Technology, Kyogu Dong, Central District, Pyongyang, DPRK
  2. Student,, Department of Metal engineering, Kim Chaek University of Technology, Kyogu Dong, Central District, Pyongyang, DPRK
  3. Student,, Department of Metal engineering, Kim Chaek University of Technology, Kyogu Dong, Central District, Pyongyang, DPRK
  4. Student,, Department of Metal engineering, Kim Chaek University of Technology, Kyogu Dong, Central District, Pyongyang, DPRK
  5. Student,, Department of Metal engineering, Kim Chaek University of Technology, Kyogu Dong, Central District, Pyongyang, DPRK

Abstract

An electric arc furnace (EAF) roof usually works at high temperature for a long time, undergoes not only heat radiations from electric arc, molten metal, and lining of high temperature, but also is washed and affected by chemical erosion due to high temperature and gas flow. In addition, it might be eroded by slag with high temperature. In, inside roof of EAF is more severely affected by heat load than outside roof. Thus, the life of the EAF roof built of refractory materials is not so long. Furthermore, the higher the input power to the EAF is, the larger the thermal load exerted on the roof is. It follows from this that the refractive roof could not be satisfied with the requirements of the EAF. Therefore,a water-cooling system should be installed so that it can endure thermal load of high temperature. The previous water-cooling system had disadvantage that heat load of cooling tube gets so much bigger due to the arc heat of electrode, waste gas heat when decarbonizing and refining, and carbon oxidation reaction heat that with lower safety of inside roof it is often broken, and its life gets lowered. In this study the previous cooling system is first investigated by means of CFD and causes of bad points are considered, because of that, appropriate water – cooling system for 20t EAF inside roof is designed and a cooling condition is determined. Secondly the safety test of the newly designed water-cooling system is done. After that, comparing to the previous cooling system, with new cooling system outlet the temperature falls from 64℃ to 43℃ and the inside roof is safe even after smelting 3~15 times. Outlet temperature of inside roof ranges from 43 to 49℃ and it can melt up to 3~15 times.

Keywords: Electric arc furnace (EAF), water-cooling, furnace roof, oxidation refining, outlet temperature, CFD

[This article belongs to Journal of Thermal Engineering and Applications (jotea)]

How to cite this article:
Chung-Hyok Oh, Kwang-Hyok Song, Song-Hua Chon, Jong-Mun Rim, Song-Il Ra. Design of a Water-Cooling System for the Inside Roof of 20t Electric Arc Furnace for Oxygen Blow Decarburization Using CFD Analysis. Journal of Thermal Engineering and Applications. 2024; 11(03):11-17.
How to cite this URL:
Chung-Hyok Oh, Kwang-Hyok Song, Song-Hua Chon, Jong-Mun Rim, Song-Il Ra. Design of a Water-Cooling System for the Inside Roof of 20t Electric Arc Furnace for Oxygen Blow Decarburization Using CFD Analysis. Journal of Thermal Engineering and Applications. 2024; 11(03):11-17. Available from: https://journals.stmjournals.com/jotea/article=2024/view=184009


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Regular Issue Subscription Original Research
Volume 11
Issue 03
Received 03/10/2024
Accepted 14/10/2024
Published 19/11/2024


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