티타늄 첨가강의 연주 노즐막힘 기구

정우광; 권오덕; 조문규; Woo-Gwang Jung; Oh Duck Kwon; Mun-Kyu Cho

Korean Journal of Materials Research, Vol.19, No.9, 473-480, September, 2009

DOI10.3740/MRSK.2009.19.9.473 Export Citation

티타늄 첨가강의 연주 노즐막힘 기구

Nozzle Clogging Mechanism in Continuous Casting for Titanium-Containing Steel

정우광 ^†, 권오덕¹, 조문규²

국민대학교 공과대학 신소재공학부
¹POSCO 기술연구소 제강연구그룹
²포항산업과학연구원 원천소재연구본부

Woo-Gwang Jung^†, Oh Duck Kwon¹, and Mun-Kyu Cho²

School of Advanced Materials Engineering, Kookmin University, Korea
¹Steelmaking Research Group, POSCO Technical Research Laboratories, Korea
²New Materials & Components Research Division, Research Institute of Industrial Science & Technology, Korea

E-mail:

In order to provide the mechanism of nozzle clogging, recovered nozzles for high strength steel grade were examined carefully after continuous casting. The thickness of clogged material in SEN is increased in the following order: from the bottom to the top of the nozzle, upper part of slag line, and the pouring hole. Nozzle clogging material begins to form due the adhesion of metal to nozzle wall, the decarburization, and reduction of oxide in the refractory by Al and Ti in the melt. The reduction of oxide in the refractory by Al and Ti improves the wettability of the melt on the refractory and forms a thin Al-Ti-O layer. Metal containing micro alumina inclusions is solidified on the Al-Ti-O layer, and the solid layer grows due to the heat evolution through the nozzle wall. Thermodynamic calculation has been made for the related reactions. The effect of superheat to the nozzle clogging is discussed on ultra low carbon steel and low carbon steel.

Keywords:Ti containing steel;continuous casting;nozzle clogging;mechanism;wettability;oxide;thermodynamics

[References]

Shikano H, Harada T, Iitsuka S, Kataoka S, Taikabutsu, 42, 2 (1990)
Kurata K, Matsui T, Nakai M, Fukunaga S, Taikabutsu, 42, 47 (1990)
Kasai N, Kawasaki M, Hayashi Y, Kawai H, Sumitomo Kinzoku, 42, 1 (1990)
Sugino T, Kawamura T, Hayamizu K, Taikabutsu, 44, 279 (1992)
Sasai K, Mizukami Y, Yamamura H, Tetsu to Hagane, 79, 1067 (1993)
Ogibayashi S, Taikabutsu Overseas, 15, 3 (1995)
Ikemoto T, Sawano K, Taikabutsu Overseas, 15, 15 (1995)
Mukai K, Tsujino R, Sawada I, Zeze M, Mizoguchi S, Tetsu to Hagane, 85, 307 (1999)
Tsujino R, Mukai K, Yamada W, Zeze M, Mizoguchi S, Tetsu to Hagane, 85, 362 (1999)
Basu S, Choudhary SK, Girase NU, ISIJ International, 44, 1653 (2004)
Takahashi I, Mineura K, Sudo T, Yoshida S, Nihon Stainless Kiho, 20, 45 (1985)
Nakano T, Matsumura S, Yanai T, Kusano A, Nakajima K
The 19th Committee on Steelmaking, The Japan Society for the Promotion of Science, Steelmaking Data Sourcebook, Gordon and Breach Science Publishers, New York, USA (1988). (1988)
Barin I, Knacke O, Thermochemical Properties of Inorganic Substances, Springer, Berlin (1973); supplement with O. Kubaschewski (1977). (1977)
Slag Atlas, 2nd Ed., p. 522-524, p. 532, ed. VDEh, Verlag Stahleisen GmbH, Dsseldorf, Germany (1995). (1995)

[Related Articles]

[1] Shikano H, Harada T, Iitsuka S, Kataoka S, Taikabutsu, 42, 2 (1990)

[2] Kurata K, Matsui T, Nakai M, Fukunaga S, Taikabutsu, 42, 47 (1990)

[3] Kasai N, Kawasaki M, Hayashi Y, Kawai H, Sumitomo Kinzoku, 42, 1 (1990)

[4] Sugino T, Kawamura T, Hayamizu K, Taikabutsu, 44, 279 (1992)

[5] Sasai K, Mizukami Y, Yamamura H, Tetsu to Hagane, 79, 1067 (1993)

[6] Ogibayashi S, Taikabutsu Overseas, 15, 3 (1995)

[7] Ikemoto T, Sawano K, Taikabutsu Overseas, 15, 15 (1995)

[8] Mukai K, Tsujino R, Sawada I, Zeze M, Mizoguchi S, Tetsu to Hagane, 85, 307 (1999)

[9] Tsujino R, Mukai K, Yamada W, Zeze M, Mizoguchi S, Tetsu to Hagane, 85, 362 (1999)

[10] Basu S, Choudhary SK, Girase NU, ISIJ International, 44, 1653 (2004)

[11] Takahashi I, Mineura K, Sudo T, Yoshida S, Nihon Stainless Kiho, 20, 45 (1985)

[12] Nakano T, Matsumura S, Yanai T, Kusano A, Nakajima K

[13] The 19th Committee on Steelmaking, The Japan Society for the Promotion of Science, Steelmaking Data Sourcebook, Gordon and Breach Science Publishers, New York, USA (1988). (1988)

[14] Barin I, Knacke O, Thermochemical Properties of Inorganic Substances, Springer, Berlin (1973); supplement with O. Kubaschewski (1977). (1977)

[15] Slag Atlas, 2nd Ed., p. 522-524, p. 532, ed. VDEh, Verlag Stahleisen GmbH, Dsseldorf, Germany (1995). (1995)