산화물계 SEN내화물의 슬래그 라인부 침식특성 연구

성영택; 손정훈; 이승석; 배동식; Young Taek Sung; Jeong Hun Son; Sung Seok Lee; Dong Sik Bae

Korean Journal of Materials Research, Vol.24, No.1, 53-59, January, 2014

DOI10.3740/MRSK.2014.24.1.53 Export Citation

산화물계 SEN내화물의 슬래그 라인부 침식특성 연구

Study on the Corrosion Characteristics in the Slag Line of SEN Oxide Refractory

성영택, 손정훈, 이승석¹, 배동식^†

창원대학교
¹포항산업과학연구원

Young Taek Sung, Jeong Hun Son, Sung Seok Lee¹, and Dong Sik Bae^†

School of Nano & Advanced Materials Engineering, Changwon National Univ, Gyeongnam 641-773, Korea
¹New Materials Research Department Senior Researcher, RIST, Gyeongbuk 790-330, Korea

E-mail:

The corrosion resistance of submerged entry nozzle (SEN) materials were investigated for high-class steel manufacturing. Composite samples were fabricated by mixing ZrO2, Al2O3, MgO, mullite, spinel, and carbon. The raw materials were mixed with attrition milling, compacted in a uniaxial pressure of 200MPa and calcined at 1000 oC for 3 h in N2 atmosphere. The bulk density and apparent porosity of the calcined samples were measured by the liquid displacement method in water using Archimedes’s principle. The corrosion resistance of the samples were measured by cup test with mold powder at 1550 oC for 2 h. The microstructure and elemental analysis of samples were observed by scanning electron microscopy (SEM), energy dispersive spectrum (EDS), and X-ray diffraction pattern (XRD). The XRD result shows that the starting raw materials were crystalline phase. The microstructure of fabricated specimen was investigated before and after corrosion tests at 1000 oC and 1550 oC for 2h. ZrO2-C composite showed good resistance in the slag corrosion test. Among the composite oxide materials, ZrO2-Al2O3-C and ZrO2-MgO-C showed better resistance than ZrO2-C in the slag corrosion test. The diameter variation index of ZrO2-C refractory was 16.1 at 1000 oC for 2 h. The diameter variation index of the ZrO2-Al2O3-C refractory was larger than that of the ZrO2-C refractory at 1550 oC for 2 h.

Keywords:oxide refractory;submerged entry nozzle;corrosion resistance;ZrO2-C

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[2] Apelian D, McCauley WL, I & SM, Nov., 28 (1980)

[3] Cramb AW, Byrne, I & SM, May, 27 (1986)

[4] Branion RV, I & SM, Sept. 41 (1986)

[5] McCauley WL, Koul MK, Washington D. C., 5th intern. Iron and steel Congress, Steelmaking proceedings, 69, 87 (1986)

[6] Bayly GJ, Industrial Heating, Aril, 18 (1984)

[7] Stevens R, Zirconia and Zirconia Ceram., Magnesium Elektron Ltd (1986)

[8] Alper ed AM, High Temperature Oxides Part II, Academic press, New York, 5 (1970)

[9] Sunwoo S, Kim H, Lee JK, J. Kor. A. Cryst. Growth., 10(3), 226 (2000)

[10] Cheon SH, Kong HS, Jun BS, J. Kor. Ceram. Soc., 41(9), 657 (2004)

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[12] Cho MK, Hong GG, J. Kor. Ceram. Soc., 36(4), 410 (1999)