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Enhancement of the Life of Refractories through the Operational Experience of Plasma Torch Melter
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 Title & Authors
Enhancement of the Life of Refractories through the Operational Experience of Plasma Torch Melter
Moon, Young Pyo; Choi, Jang Young;
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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;
 Cited by
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).

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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.

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