Cause Analysis and Control Measures of Steel Leakage in Medium-thin Slab Caster

Author of the article:LIU Xin, WANG Shuai, ZHAO Jianping, WU Zhijie, JIN Yu

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

Key Words：medium-thin slab caster; submerged nozzle; slide surface; slide surface steel leakage

Abstract：The reason of steel leakage between plate in medium-thin slab caster was analyzed. The results show that the main cause of steel leakage between plates is oxidation of nozzle surface. By optimizing the nozzle surface material, to improve the nozzle surface accuracy, to improve the slide baking process, to ensure that the gate on the up and down, argon gas pressure above 0.01 MPa, to improve the quick change institutions hydraulic cylinder speed and guarantee the accuracy of the quick change and cooling effect, fast in submerged nozzle measures such as operation, it can make in the thin slab continuous caster without plate between the steel.