Practice of Improving Tundish Life of Medium-thin Slab Caster

Author of the article:LIU Xin, WANG Shuai, ZHAO Jianping, WU Zhijie, CUI Jiafeng

Author's Workplace：Tangshan Iron and Steel Company, Hebei Iron and Steel Group, Tangshan 063016, China

Key Words：medium-thin slab caster; tundish; tundish life

Abstract：The reasons affecting the tundish life of medium-thin slab caster were analyzed. The results show that the tundish life of medium thin slab caster is mainly affected by the corrosion rate of tundish resistant materials and the abnormal condition on site. To reduce the oxidation of molten slag in the tundish, to control the liquid level of the tundish by changing slag line, to choose the baking system of the tundish reasonably, to strictly control the slag from the large tundish, to optimize the composition of dry materials and the operation of ladle loading, effectively prevent the plug rod from loosening and improve the pouring ability of low carbon and low silicon aluminum killed steel, it can solve the problem of steel crossing between plates at the water change port, so that the service life of the tundish of the casting machine is increased from 13 h to 17 h.