Abstract：The carbon pick-up effects of ladle lining， covering agent， tundish lining and continuous casting heats on the BH molten steel of were analyzed from refining end to tundish process. The results are shown that the carbon pick-up effect is suppressed significantly when the carbon in ladle liling and bottom is controlled to be under 0.5% and the carbon in slag-line is controlled to be under 5%. Based on the heat-transfer model， the composition of covering agent is controlled in the region[（wSiO2≤5%，][wCaO/Al2O3＝1-1.5，][wCaF2＝5%）]to avoid the contact between enriched carbon layer and molten steel by enlarging melting layer. The carbon pick-up decreased by 1.4×10－6-1.5×10－6 and the percentage of carbon pick-up under 3×10－6 increased to 60% from 36%-44% by using new working layer in tundish and using the carbon-free long nozzle.
董文亮， 季晨曦， 关顺宽， 潘宏伟， 邓小旋， 罗 磊. BH钢精炼结束到中间包过程增碳控制研究[J]. , 2017, 36(5): 23-28.
DONG Wen-liang， JI Chen-xi， GUAN Shun-kuan，PAN Hong-wei， DENG Xiao-xuan， LUO Lei. Contol of carbon pick-up in the bh steel from refining end to tundish process. , 2017, 36(5): 23-28.
Okamoto A, Takahashi M, Hino T.Development of Bake-hardenable Al-killed Steel Sheet by Box-annealing Process[J].Transactions of the Iron & Steel Institute of Japan, 1981, 21(11):802-811
[2]
Chirstine Escher, Volker Brandenburg, Ilse Heckelmann.Bake Hardening and Ageing Properties of Hot-Dip Galvanized ULC Steel Grades．[J]., 2006, :-
Nagata K, Susa M, Goto K.Thermal Conductivities of Slags for Ironmaking and Steelmaking[J].Tetsu- to- Hagane, 1983, 69:1417-1424
[10]
Glaser B, Du S.Thermal Conductivity Measurements of Ladle Slag Using Transient Hot Wire Method[J].Metallurgical & Materials Transactions Part B, 2013, 44(1):1-4
2017, Vol. 36 
