提高钒铌元素收得率的转炉冶炼脱氧工艺探讨  

Discussion on BOF Steelmaking Deoxidization Technology for Increasing Yield Rate of Vanadium and Niobium Elements

作　　者：龙雨[1] 胡友红[2] 伍从应 谢祥[2] 刘立德[3] 高长益[3] 

机构地区：[1]首钢水城钢铁(集团)有限责任公司 [2]首钢水城钢铁(集团)有限责任公司炼钢厂 [3]首钢水城钢铁(集团)有限责任公司技术中心,贵州六盘水553028

出　　处：《四川冶金》2017年第3期30-33,共4页Sichuan Metallurgy

摘　　要：分析了转炉冶炼过程中钒铌元素的氧化特征、钢水中钒铌与碳元素的选择性氧化原理和钒铌微合金化建筑螺纹钢的脱氧工艺。为了提高钒铌元素的收得率,对转炉冶炼脱氧工艺进行了以下优化:转炉冶炼采用顶底复吹,提高终点碳命中率,有效挡渣出钢,钢包内脱氧剂以硅锰合金为主,钒合金化选用氮化钒铁,铌合金化选用50铌铁,钒铌合金在钢水脱氧后直接加入钢包,采用钢包吹氮精炼钢水。The characters of oxidation of vanadium and niobium elements during basic oxygen furnace （BOF） steel-making process, the selective oxidation principle of vanadium and niobium and carbon elements and the deoxidation technology of vanadium and niobium micro-alloying reinforced steel arc analyzed. In order to increase yield rate of vanadium and niobium elements,BOF stcclmaking deoxidation technology is optimized as follows： top and bottom combined blowing is taken in BOF stcclmaking, end point carbon hit rate increases, slag is effectively cut off tap-ping, Si-Mn alloy is used as a main deoxidizing agent added into ladle, vanadium VFc nitride is used for vanadium alloying,50 NbFc is used for niobium alloying, vanadium or niobium alloy is directly added to ladle after deoxida-tion of molten steel, nitrogen blowing in ladle is used for refining of molten steel.

关 键 词：钒 铌 微合金化 钢筋 转炉冶炼 

分 类 号：TF713[冶金工程—钢铁冶金]