RH精炼喂CaSi线去除无取向硅钢中的非金属夹杂物-钢铁钒钛.PDFVIP

第34卷第1期 钢摇 铁摇 钒摇 钛 Vol.34,No.1 2013年2月 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 IRON STEEL VANADIUM TITANIUM 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 February2013 RH精炼喂CaSi线去除无取向硅钢中 的非金属夹杂物 宗震宇,张摇 峰 (宝山钢铁股份有限公司,上海201900) 摘摇 要:结合工业化生产的无取向硅钢,进行了RH精炼喂 CaSi 线去除钢中的非金属夹杂物试验研究。 针对不同 的钙处理条件,分析了CaS夹杂生成热力学,观察了夹杂物的形貌和尺寸分布,确定了夹杂物的类型、数量,探讨了 钙处理后钢中夹杂物的变化规律。 结果表明,本试验条件下,钙处理可以有效抑制 MnS、AlN 夹杂物的生成,有效 促进钢中微细夹杂物的聚合、上浮、去除,钢质纯净度明显提高。 经过合适的钙处理后,钢中的夹杂物以独立存在 的CaO为主,同时有少量含CaO、SiO 、MgO 的复合夹杂,没有发现CaS夹杂存在。 这部分夹杂物的尺寸集中分布 2 5 3 在2~20 滋m,数量约为1.8伊10 个/ mm 。 关键词:无取向硅钢;RH精炼;钙处理;夹杂物 中图分类号:TF769郾4摇 摇 文献标志码:A摇 摇 文章编号:1004-7638(2013)01-0058-06 DOI:10.7513/ j.issn.1004-7638.2013.01.012 Removal of Non鄄metallic Inclusions in Non鄄oriented Silicon Steel by CaSi Wire Feeding During the RH Refining Zong Zhenyu ,Zhang Feng (Baoshan Iron Steel Co. ,Ltd. ,Shanghai201900,China) Abstract:Experimental study on removal of non鄄metallic inclusions in non鄄oriented silicon steel obtained from industrial production by CaSiwirefeeding during RH refining processwas carried out. The thermo鄄 dynamics of CaS inclusion formation was analyzed,the morphology and the size distribution of inclusions were observed,and the numbers and types of inclusions were also determined for the steel specimens treated under different calcium treatment conditions. Furthermore,the variation of inclusion characteris鄄 ticsafter calcium treatment wasdiscussed. The results show that due to calcium treatment,theformation of MnS and AlN inclusions can be restrained,and the aggregation,flotation an