Abstract:The reasons and control measures of inclusion in first wide heavy slab produced by BOF-LF-RH-CCM were studied by means of [N] content analysis, aluminum burning loss analysis, Sulfur Print, etc. It is found that the inclusion contents of first slab obviously decreasing and the defect rate of surface inclusion was reduced from 42.1% to 10.5% through optimization of soft blowing process,Argon blowing in tundish , minimizing mould filling time, promoting operating level of start casting and accelerating casting speed fast.The distribution of inclusions was non-homogeneous along both thickness and wideness direction of slab. The inclusions assembled in 1/2 position and in 1/4 at board base thickness and width direction.
曹磊,王玉民,丁中,刘飞,张辉. 开浇第一炉连铸坯夹杂物形成原因与控制措施[J]. 中国冶金, 2014, 24(2): 9-13.
CAO Lei,WANG Yu-min,DING Zhong,LIU Fei,ZHANG Hui. Reasons and Control Measures of Inclusion in First Slab. China Metallurgy, 2014, 24(2): 9-13.