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控制含硫钢A类夹杂的生产实践
Production Practice of Controlling Class A Inclusion in Sulfur-containing Steel
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- DOI:
- 作者:
- 李虹 魏巍
LI Hong;WEI Wei
- 作者单位:
- 石钢京诚装备技术有限公司技术中心
Technology Center,Shi Gang Jing Cheng Equipment Development and Manufacturing Co.,Ltd.,Yingkou 115000,China
- 关键词:
- 含硫钢 钙处理 非金属夹杂物
sulphur-containing steel calcium treatment non-metallic inclusion
- 摘要:
- "BOF-LF-VD-CC"工艺流程生产含硫钢,在VD真空处理前,钢中[O]含量≤10×10-4%,[S]含量≤0.005%。钢液温度≥1 600℃时,按0.02 kg/t进行钙处理,VD真空保持时间≥10 min,软吹时间≥15 min,VD破空后按0.035%~0.040%喂入硫磺线。结果表明,连铸过程保护浇注、禁止下渣,可控制含硫钢轧材A类夹杂细系/粗系级别分别≤2.0级。
Sulfur-containing steel was produced by the process of "BOF-LF-VD-CC", before VD vacuum treatment, the content of [O] in the steel was no more than 10×10-4%, and the content of [S] was no more than 0.005%. When the molten steel temperature was greater than or equal to 1 600 ℃, calcium was treated at 0.02 kg/t, VD vacuum holding time was ≥10 min, soft blowing time was ≥15 min, and the sulfur line was fed at 0.035%~0.040% after VD caving. The results show that in the process of continuous casting, casting and slag removal are protected and prohibited, and the grade of class A inclusions of sulfur-containing steel rolling materials is ≤2.0.