一、前言连铸时钢包至中间包钢流的二次氧化是铸坯中非金属夹杂的重要来源,钢包铸流实行保护浇注是减少夹杂产生的积极技术措施。由于不少钢种均含有铝、铬、钛等易氧化元素,这些元素在浇注过程中产生的二次氧化物,熔点高,常常是水口堵塞的主要 I. Introduction Continuous casting ladle to tundish steel secondary oxidation is an important source of non-metallic inclusions in billet, ladle casting flow protection casting is to reduce the inclusion of active technical measures. Since many steels contain easily oxidizable elements such as aluminum, chromium and titanium, these secondary oxides produced during the pouring process have high melting points and are often the main cause of blockage in the nozzle