- Volume 14 Issue 2
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Enhancement of the Life of Refractories through the Operational Experience of Plasma Torch Melter
플라즈마토치 용융로 운전경험을 통한 내화물 수명 증진 방안
- Received : 2016.01.05
- Accepted : 2016.03.22
- Published : 2016.06.30
The properties of wastes for melting need to be considered to minimize the maintenance of refractory and to discharge the molten slags smoothly from a plasma torch melter. When the nonflammable wastes from nuclear facilities such as concrete debris, glass, sand, etc., are melted, they become acid slags with low basicity since the chemical composition has much more acid oxides than basic oxides. A molten slag does not have good characteristics of discharge and is mainly responsible for the refractory erosion due to its low liquidity. In case of a stationary plasma torch melter with a slant tapping port on the wall, a fixed amount of molten slags remains inside of tapping hole as well as the melter inside after tapping out. Nonmetallic slags keep the temperature higher than melting point of metal because metallic slags located on the bottom of melter by specific gravity difference are simultaneously melted when dual mode plasma torch operates in transferred mode. In order to minimize the refractory erosion, the compatible refractories are selected considering the temperature inside the melter and the melting behavior of slags whether to contact or noncontact with molten slags. An acidic refractory shall not be installed in adjacent to a basic refractory for the resistibility against corrosion.
Refractory;Nonflammable waste;Plasma torch;Slag;Basicity
- J.K. Park, Y.P. Moon, B.C. Park, M.C. Lee, M.J. Song, K.S. Koh, J.M. Cho, and J.W. Lee, LILW Vitrification Technology Development(I), Korea Electric Power Co. Final Report, 3-4, 96NJ17 (1999).
- H.R. Lee, History of Refractory Materials, 1st ed., 88-89, The Korean Ceramic Society e-book, December 31 (2015).
- H.J. Engell(Joint translation by J.D. Shim and B.C. Ban), Schlacken in der Metallurgie, 1st ed., 13-86, Dae- Kwang-Moon-Wha company, May (1991).
- H. Kim, K.C. Park, Y.H. Paek, K.D. Oh, J.K. Lee, H.R. Lee, M.O. Ju, and S.W. Choi, Refractory Materials Engineering, 1st ed., 3-4, Korea Refractory Industry Cooperative, July (1991).
- H.S. Park, K.I. Gee, J.S. Chang, S.K, .H.J. Bae, H.J. Kim, S.C. Lee, S.J. Ju, and B.S. Shin, "Slagging treatment of MSW incineration ash by plasma system", Proc. of Korean Society of Soil and Environment, 66-67, Oct. 29,1999, JeJu Unversity.
- B.C. Ban, Y.B. Kweon, S.J. Kim, and H.S. Park, Advanced Melting Technology for Waste Treatment, 1st ed., 179-186, Whan-Kyung-Kong-Eop publishing company, Oct. 13 (2003).
- H.S. Park, H.J. Kim, J.S. Chang, K.I. Jee, and H.N. Lee, Melting Technology for Municipal Waste and Sewage Sludge, 1st ed., 52-53, Engineering & Technology Research Center of Industrial Waste for Advanced Materials, August (1998).
- Y.P. Moon, T.W. Kim, H.S. Kim, S.W. Shin, and M.C. Lee, "Melting Experiment in Concrete Waste using a Hollow Type Plasma Torch mounted on Furnace", 601-609, Proc. of Korean Nuclear Society, Spring, 2000, Kori.
- M.J. Song, Y.P. Moon, and C.H. Cho, K.S. Ko, S.Y. Keum, Y.S. Yang, and J.M. Cho, Vitrification and Plasma Technology for LLW Volume Redudction, Korea Electric Power Research Institute 3rd Report, 15-17 (1997).
- D.M. Kim, A Study on Electrical conductivity of High temperature Melts with Noncombustible Wastes in Furnace by Plasma , Master's theis, Chung-Nam National University,18-19, (2011).
- J.K. Park, Y.P. Moon, B.C. Park, M.J. Song, K.S. Ko, and J.M. Cho, J. of Environmental Science and Health, Vol. A36, 861-871(2001).
- T.G. Kim, J.S. Park, K.H. Kim, K.J. Kim, and H.S. Kim, "Effect of Inorganic Additive Contents on the Thermal Properties of Al2O3-SiC-C System Refractories", Proc. of the Fall Meeting of The Korean Ceramic Society, P1-G7-3, 198, November 4-6, 2015, Song-do.
- H.S. Park, Y.K. Hong, K.S. Kim, D.k. Kim, and S.O. Moon, Project for utilization of contagious & hazardous waste pyrolysis melting system by entended arc plasma, Young Engineering Company Project Report, 239-252 (2007).