SiO_2还原机理及过还原控制措施  

Reduction mechanism of SiO_2 and counter measures of overreduction

作　　者：秦洁[1,2] 齐建玲[1] 刘功国[1] 李占军[1] 

机构地区：[1]攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]重庆大学材料科学与工程学院,重庆400030

出　　处：《钢铁》2017年第12期28-35,共8页Iron and Steel

基　　金：国家重点基础研究发展(973)计划资助项目(2013CB632603)

摘　　要：为了解决工艺难题,提高生产效率,针对电炉冶炼钒钛矿金属化球团过程中由出现SiO_2过还原导致的电炉冶炼不顺畅、含钒铁水提钒困难等一系列难题开展研究,分析了反应物、冶炼温度、冶炼时间等因素对SiO_2还原过程的影响。在此基础上,提出了优化黏结剂种类、严格控制还原剂加入量、适当降低反应温度和缩短冶炼时间等措施。通过实施以上措施,熔分电炉第六炉役的技术指标明显好转,含钒铁水中同时满足w(V)≥0.35%、w(Si)≤0.5%的炉次比例超过85%,有效解决了SiO_2过还原问题。In order to solve technical problems and improve production efficiency,works have been carried out in time.In the smelting process of V-Ti metallized pellets with EAF,SiO2 can be over reducted easily,which will lead to a series of problems,such as unsmooth smelting process in EAF,difficult vanadium recovering from the hot metal,etc. In order to solve these problems,the effects of reactants,smelting temperature and smelting time on SiO2 reduction were studied. Then countermeasures were proposed,including binder optimization,control of deoxidizer adding amount,reduction of reaction temperature and smelting time. With these countermeasures,the technical indicators were improved obviously in the sixth campaign of the furnace. The accepted ratio of hot metal composition is above 85%,w（V） and w（Si） in vanadium-bearing hot metal are not less than 0.35% and not more than 0.5%,respectively.

关 键 词：SIO2 过还原 钒钛 金属化球团 提钒 

分 类 号：TF841.3[冶金工程—有色金属冶金]