转炉双联炼钢工艺热态渣再利用脱磷的工业试验  

Research on recycling of hot slag in dephosphorization furnace of duplex process

作　　者：白雪峰 张一民 孙彦辉 罗磊[2] 赵长亮 BAI Xuefeng;ZHANG Yimin;SUN Yanhui;LUO Lei;ZHAO Changliang(Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China;Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063200,China)

机构地区：[1]北京科技大学钢铁共性技术协同创新中心,北京100083 [2]首钢京唐钢铁联合有限责任公司,河北唐山063200

出　　处：《炼钢》2018年第5期31-36,共6页Steelmaking

基　　金：中国自然科学基金(项目批准号51574026;51774030)对本研究的资助

摘　　要：通过对双联工艺生产汽车板中300 t脱磷转炉进行脱碳转炉热态渣循环工艺的研究,分析了热态渣循环利用过程对脱磷转炉脱磷效率以及辅料消耗的影响。结果表明,热态渣循环工艺能够充分利用脱碳转炉热态渣高CaO、低P_2O_5以及成渣快的特点,从而实现脱磷炉的高效脱磷。采用热态渣循环工艺以后,热态渣试验炉次钢种半钢终点磷质量分数平均降低0. 003 7%,平均脱磷率提升至63. 55%。试验炉次石灰使用量较常规炉次平均每炉降低2. 18 t。Hot decarburization converter slag was studied in 300 t dephosphorization furnace of duplex process for auto sheet, and the effect of recycling process on dephosphorization efficiency and auxiliary material consumption in dephosphorization furnace was analyzed. The results showed that the recycling process of hot decarburization converter slag with high CaO, low P2O5 content and rapid slag forming rate, could achieve efficient dephosphorization in dephosphorization furnace. Mter adopting the hot slag recycling process, the end point dephosphorus mass fraction in semi-steel on average decreased by 0.003 7 %, and average dephosphorus rate increased to 63.55 % in test furnaces. Besides, lime consumptionin of test furnaces reduced by average 2.18 t per furnace comparing with normal furnaces.

关 键 词：脱磷炉 脱碳炉热态渣 脱磷率 循环 

分 类 号：TF704.4[冶金工程—钢铁冶金]