钒钛铁精矿内配碳球团低温焙烧特性研究  

Study on the Characteristics for Low Temperature Roasting Process of Vanadium and Titanium Iron Concentrate Carbon-containing Pellets

作　　者：马兰[1] 杨绍利[2,3] 曾扬州 

机构地区：[1]攀枝花学院材料工程学院,四川攀枝花617000 [2]四川省钒钛材料工程技术研究中心,四川攀枝花617000 [3]攀枝花学院攀西科技创新中心,四川攀枝花617000

出　　处：《钢铁钒钛》2014年第6期60-65,共6页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金项目"钒钛铁精矿内配碳球团传热-还原-钒走向的机理研究"(51174122)

摘　　要：将钒钛铁精矿内配碳球团分别进行干燥、750℃和1 000℃焙烧,采用XRD、SEM/EDS、化学分析及强度测试方法,研究了球团在低温焙烧条件下的物相、微观形貌、成分及强度的变化。结果表明:钒钛铁精矿粉、煤粉、水和复合黏结剂按照质量比100∶9∶9∶1.0混合压球,干球团强度较湿球团强度有明显提高;750℃焙烧球团与干球的主要物相差别不大,但Fe3O4衍射峰强度增加,矿粉颗粒空隙增大,球团强度急剧下降;1 000℃焙烧球团主要物相为钛铁晶石(Fe2TiO4)和还原铁,球团收缩,强度增大。Vanadium and titanium iron concentrate pellets conaining carbon after drying, 750 ℃ and1 000 ℃ roasting had been used to investigate phase, microstructure, composition and intensity changeunder low temperature calcination by means of XRD, SEM/ EDS, chemical analysis and strength testing.The results show that the vanadium and titanium iron ore concentrate, pulverized coal, water, and com-posite binder mix in accordance with the mass ratio of 100 ∶ 9 ∶ 9 ∶ 1.0, the resulted dry pellets strengthis significantly higher than wet pellets. While main phase of pellet roasted at 750 ℃ show no observeddifference with that of dry pellet, but XRD result indicate increasing Fe3O4 peak intensity. The gap be-tween the mineral powder particles increases and strength of pellets dramastically decreases. Roastingtemperature of 1 000 ℃ generates main phase of pellet composing of Fe2TiO4 and reduced iron, and cau-ses pellets shrinkage and thus strength increase.

关 键 词：钒钛铁精矿 内配碳球团 低温焙烧 强度 成分 

分 类 号：TF046[冶金工程—冶金物理化学]