Multifunctional Refractory-lined Vessel: Ladle Aggregate  

作　　者：GUO Zongqi ZAMBONI Stefano GAN Feifang GAO Jianying 

机构地区：[1]Trasteel International SA,Lugano CH-6900,Switzerland [2]Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China [3]Imerys(China)Co.,Ltd.,Tianjin 300457,China

出　　处：《China's Refractories》2021年第1期1-6,共6页中国耐火材料（英文版）

摘　　要：A ladle primarily is a container used to transport molten steel from the steelmaking unit to the casting facility.The essential requirements are heat resistant,insulative and strong enough to hold molten steel up to 300 t,with a structure of multilayered refractory lining in a steel shell vessel.When a ladle is assembled with three-phase graphite electrodes,a ladle furnace forms,starting steel refining process with/without the vacuum tank degasser and RH circulating degasser,in order to meet the growing demand on high purity and higher quality steel.The working lining is under aggressive conditions that comprise the chemical reaction with molten steel,the severe corrosion of liquid slag,the disaggregation through oxidation,and the strong stress due to the impacting of the melts and gases and the effects of thermomechanical behaviors.Magnesiacarbon brick is one of the major materials,being indispensable for the slagline of a ladle furnace.Alumina-magnesiacarbon brick has played an important role to substantially increase the service life in the metal zone,from the early lining materials of high alumina and doloma bricks.The permanent lining must assume sufficient responsibility to allow finishing the process of the engaged charge in case of a failure in the working lining.The insulation layer must be as thin as possible in order to maximize the ladle’s capacity,and reduce the shell temperature for saving energy.In this issue,several integrant refractories are reviewed or investigated in order to compile a lining overview,and to contribute a prolonged service life under aggressive working conditions of the ladle furnace.

关 键 词：ladle furnace steel refining ladle cycle ladle lining temperature gradient 

分 类 号：TF341[冶金工程—冶金机械及自动化] TQ175.1[化学工程—硅酸盐工业]