硬线钢LF增铝理论计算及水口结瘤分析  

Theoretical calculation for aluminum pick-up of high carbon steel in LF refining process and study on tundish nozzle clogging

作　　者：张祥艳[1] 陈兴伟[1] 张春燕[1] 陈春生[1] 张晓香[1] 李毅平[1] 

机构地区：[1]河北钢铁集团唐山钢铁集团有限责任公司技术中心长材研究所,河北唐山063016

出　　处：《炼钢》2012年第5期56-60,共5页Steelmaking

摘　　要：以热力学计算为基础,探讨了唐山钢铁集团有限责任公司硬线钢LF精炼过程中,钢水中Si、C与精炼渣中的Al2O3反应导致钢水增铝的可能性;通过理论计算分析LF精炼工艺参数对钢水平衡含铝量的影响,确定了最佳的LF精炼工艺。并结合文献分析了唐钢硬线钢小方坯连铸中间包水口结瘤原因。通过理论计算得出:目前硬线钢LF精炼工艺,满足钢水可浇性的要求;高牌号硬线钢LF精炼工艺采用精炼渣碱度R≤1.0,精炼渣中的w(Al2O3)≤5%,精炼温度t<1 600℃,同时严格控制原材料的含铝量,LF精炼过程中钢水平衡w(AlS)<3.5×10-6。Probability analysis of silicon and carbon in steel and A1203 in refining flux re- acting on the acid soluble aluminum content pick-up of the high carbon steel have been researched through thermodynamic calculation during LF refining. LF refining factors related to influence aluminum content were studied theoretic to determine the better LF refining process. Mechanism and countermeasures of high carbon steel are summarized to solve nozzle clogging. The theoretical results show that the present LF refining process can eliminate the tundish nozzle clogging, and the proper LF refining process should be controlled that the basicity of the slag （R≤1. 0） and w（A12O3）≤5 % and re- fining temperature （t〈 1 600 ℃）, then aluminum content in the molten steel can be controlled under 3.5 ＊10-6.

关 键 词：LF精炼 增铝 水口结瘤 硬线钢 

分 类 号：TF763[冶金工程—钢铁冶金]