改善套管钢冶炼过程浸入式水口的堵塞  

Improvement of Submerged Nozzle Clogging During the Process of Smelting Casing Steel

作　　者：姚同路[1] 杨勇[1] 贺庆[1] 杨利彬[1] 谭清元[1] 

机构地区：[1]钢铁研究总院冶金工艺研究所,北京100081

出　　处：《钢铁研究学报》2011年第2期17-20,24,共5页Journal of Iron and Steel Research

摘　　要：通过金相分析、扫描电镜、能谱分析等手段对国内某钢厂生产石油套管钢的水口堵塞物进行了分析,对冶炼过程Al2O3夹杂的控制问题从热力学角度进行了研究。热力学计算结果表明,当钢中的酸溶铝含量为0.025%(质量分数,余同)时,若钙处理时钢中钙含量高于22×10-6,硫含量低于0.008%,可较容易地将Al2O3夹杂变性为低熔点易上浮的C12A7。在热力学计算基础上,通过强化钢水钙处理,钢中钙含量提高至25×10-6～40×10-6,夹杂物变性上浮容易,连浇炉数由3～4炉提高至大于8炉。Analytical techniques such as metallographic examination, SEM, EDS were applied to research the clogging substance during oil casing steel production in some steel work. The thermodynamics of controlling oxidation inclusions were analyzed. The thermodynamic calculation results show that when the dissolved aluminum is about 0. 025 %, if the content of calcium more than 22×10^-6 , sulphur less than 0. 008 %, it can easily modify Al2O3 in to low melting point C12 A7. By strengthening the calcium treatment, the actual content of calcium is distributed from 25 X 10 6 to 40 ×10^-6 , the inclusions modality and floatation are easier, continuous heats of tundish is increased from 3--4 to more than 8.

关 键 词：石油套管 浸入式水口 堵塞机理 热力学 

分 类 号：TF701[冶金工程—钢铁冶金]