钒钛球团矿熔滴过程中有价元素及物相的变化  

Change of phase composition and valuable elements in V-Ti pellet during softening-melting and dripping process

作　　者：谢洪恩[1,2] 郑魁 黄楚 朱凤湘 刘娟 Xie Hong’en;Zheng Kui;Huang Chu;Zhu Fengxiang;Liu Juan(Pangang Group Research Institute Co.,Ltd.,Panzhihua 617000,Sichuan,China;State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China;Xichang Steel and Vanadium Co.,Ltd.,Pangang Group,Xichang 615000,Sichuan,China)

机构地区：[1]攀钢集团研究院有限公司,四川攀枝花617000 [2]钒钛资源综合利用国家重点实验室,四川攀枝花617000 [3]攀钢集团西昌钢钒有限公司,四川西昌615000

出　　处：《钢铁钒钛》2024年第4期105-112,128,共9页Iron Steel Vanadium Titanium

摘　　要：模拟高炉冶炼气氛,对攀钢酸性钒钛球团矿在软熔和滴落过程中的物相组成和有价元素的变化进行了定量化的研究。结果表明,在钒钛球团矿的软熔滴落过程中,Ti和V逐渐从钛赤铁矿和钛铁矿迁移至渣相中。TiO_(2)既可生成Ti进入金属铁,也可大量生成碳氮化钛。滴落试验中V在金属铁中的收得率为36.03%,远高于Ti和Si的3.13%和17.20%。炉渣和金属铁吸收焦炭中的S与渣铁间的脱硫反应同时进行,金属铁中S所占的比例由软熔时的72.84%降低至滴落时的50%。软熔液泛渣中辉石和黑钛石超过80%,渣中超过70%的V和Ti分布于黑钛石中。软熔未滴落渣中辉石明显减少,橄榄石和尖晶石明显增加,尖晶石中的V和Ti明显增加。滴落试验过程中TiO_(2)逐渐被还原,TiC和TiN的质量分数之和超过20%,炉渣逐渐由TiO_(2)质量分数超过30%的高钛渣转变为TiO_(2)质量分数低于10%的低钛渣,未滴落渣中黑钛石以及分布于其中的V和Ti明显减少,橄榄石以及分布于其中的V和Ti增加。The change of phase composition and valuable elements in the process of softening-melting and dripping of acidic V-Ti pellet of Pangang were quantitatively studied by simulating the smelting atmosphere in blast furnace.The results show that Ti and V gradually migrated from titanohematite and ilmenite to slag phase during the softening-melting and dripping process of V-Ti pellet.TiO_(2)could not only be reduced to Ti into metal iron,but also generate a large amount of titanium carbonitride.In the dripping test,the yield of V in metallic iron was 36.03%,which was much higher than 3.13%of Ti and17.20%of Si.The absorbing S from coke by slag and metallic iron and the desulfurization reaction between them were carried out simultaneously,and the ratio of S in metallic iron decreased from72.84%after softening-melting test to 50%after dripping test.Pyroxene and anosovite were more than80%in the flooding slag of softening-melting test,and more than 70%of V and Ti in this slag were distributed in anosovite.While in residual slag of softening-melting test,pyroxene decreased obviously,olivine and spinel increased obviously,and V and Ti increased obviously in spinel.During the dripping test,TiO_(2)was gradually reduced until the sum of TiC and TiN mass fraction exceeded 20%,so the slag was gradually transformed from high titanium-type slag with TiO_(2)mass fraction over 30%to low titanium-type slag with TiO_(2)mass fraction less than 10%,and anosovie and its V and Ti in the residual slag were significantly reduced,while olivine and its distribution of V and Ti were increased.

关 键 词：高炉 钒钛球团矿 软熔滴落 物相组成 有价元素 碳氮化钛 

分 类 号：TF046[冶金工程—冶金物理化学] TF533