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A Study on the Properties and Methods of Electrode System for Tapping of Melts
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 Title & Authors
A Study on the Properties and Methods of Electrode System for Tapping of Melts
Moon, Young-Pyo; Choi, Jang-Young;
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 Abstract
For safety and economy reasons, hazardous waste including radioactive waste is desired to be converted into stable waste forms with a maximum volume reduction. High temperature melting technology using a plasma torch system can effectively treat even the non-flammable waste as desired. By far, one of the most difficult process for melting the non-flammable waste is a tapping of melts because the melting point of a residual slag in the tapping hole is high and because the viscosity of the melt increases sharply when tapping out. In case of a stationary furnace with a slant tapping port on the side of furnace, a certain amount of melts is left in the tapping hole after tapping out. Because of this, at every end of a melting cycle, the tapping hole needs to be opened by tapping device. The developed tapping device of melts based on both a guide electrode and auxiliary electrode is adequate for the application to discharge of melts except that the consumption of the guide electrode is somewhat faster than expected. Melt is collected in the water cooled vessel.
 Keywords
Electrode;Plasma torch;Melt;Furnace;Tapping hole;Slag;
 Language
Korean
 Cited by
 References
1.
Young-pyo Moon, Tae-won hwang, Chan-kook Moon, "Plasma Melter System for Noncombustible Waste Treatment", ANS Winter Meeting, pp. 99(2008).

2.
Jong kil Park, et al., "Non-combustible Waste Vitrification with Plasma torch melter", Journal of Environmental science and Health, Volume A36, pp. 861-871, 2001

3.
Myung Jae Song and young Pyo Moon, "A Plasma Melting Technology for Volume Reduction of Noncombustible Radioactive Waste in Korea", The 11th Pacific Basin Nuclear Conference, Vol.1, pp. 627-634, PBNC 98(1998)

4.
Young Pyo Moon, Jong Kil Park, Tae Won Whang, "An Examination on Operational Characteristics of Dual mode Plasma torch", The Korean Radioactive Waste Society, Vol. 6, No.1, pp. 79-80(2008)

5.
Young Suk Kim, et al., "Development of A Plasma Torch Melting System for Nonflammable LLRW", International Symposium on Radiation Safety Management(2007).

6.
Deuk Man Kim, Master's thesis "A study on the Conductivity Properties of the High temperature Melts in Melter during the Plasma treatment of Noncombustible waste", Chungnam National University (2011).

7.
Young Pyo Moon, Soon Mo Whang et al., "Patent registration No. 10-1032055 "Tapping device and method of melts in Plasma torch melter", Korean Intellectual Properties Office(2011. 4. 22)

8.
Hyun Seo Park, Il Rock Chung, Hyung Jin Kim, R&D Report titled "Treatment of fly ash Melting by Extended Arc Plasma" Samsung heavy Industries Co., Ltd, central R&D center(2005)