低碳铝镇静钢LF精炼过程钢中非金属夹杂物的研究  

Investigation on Nonmetallic Inclusions of LCAK Steel in LF Secondary Refining

作　　者：徐志荣[1,2] 杨文[1] 曹晶[1] 王新华[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]唐山钢铁股份有限公司第一炼钢厂,河北唐山063000

出　　处：《钢铁》2010年第10期33-36,共4页Iron and Steel

摘　　要：对LF精炼过程低碳铝镇静钢水中非金属夹杂物的变化进行了研究,发现在采用高碱度、强还原性炉渣条件下,Al2O3类夹杂物先向MgO-Al2O3系夹杂物并进而向CaO-MgO-Al2O3系夹杂物和CaO-CaS-Al2O3系夹杂物转变。在LF精炼结束时,钢中已基本没有对钢水可浇性影响最大的Al2O3系夹杂物,因此可以减少LF精炼后对钢水进行钙处理用的钙线量,以降低生产成本并减少由于钙处理而生成的大尺寸钙铝酸盐夹杂物的数量。Investigation was made on change of non-metallic inclusions in LCAK steel during LF secondary refining.It was found that,when high basicity and highly reductive slag was used in the refining,transfer of inclusions of Al2O3 in liquid steel took place first to inclusions of MgO-Al2O3 system and then to inclusions of CaO-MgO-Al2O3 and CaO-CaS-Al2O3 system.At the end of refining,there were almost no Al2O3 inclusions in the liquid steel.Therefore,the amount of calcium used for modifying Al2O3 inclusions in later Ca treatment to ensure the castability of the steel could be reduced,by which both the production cost and the amount of large inclusions of calcirm aluminates aroused by calcium treatment can be reduced.

关 键 词：低碳铝镇静钢 薄板坯连铸 LF精炼 非金属夹杂物 

分 类 号：TF777[冶金工程—钢铁冶金]