添加剂强化攀枝花钛精矿固相还原研究  

Research on Solid-phase Reduction of Panzhihua Titanium Concentrate Strengthened by Additives

作　　者：乔平 Qiao Ping(State Key Laboratory of Advanced Special Steel ＆ Shanghai Key Laboratory of Advanced Ferrometallurgy ＆School of Materials Science and Engineering,Shanghai University,Shanghai 200072,Chin)

机构地区：[1]省部共建高品质特殊钢冶金与制备国家重点实验室、上海市钢铁冶金新技术开发应用重点实验室和上海大学材料科学与工程学院,上海200072

出　　处：《上海金属》2018年第4期74-78,84,共6页Shanghai Metals

摘　　要：将攀枝花钛精矿在900℃氧化60 min后,配上过量的石墨粉,并加入不同种类的添加剂在高温下氩气气氛中进行固相还原。结果表明,添加剂能够提高还原产物的金属化率,硼砂的作用效果最好;2%(质量分数,下同)硼砂与氧化矿、石墨粉在1 100℃处理120 min后,金属化率达到了94.58%;加入2%硼砂的氧化矿的固相还原动力学曲线表明,在1 000~1 150℃还原反应初期的反应速率主要由固体界面化学反应速率控制。Panzhihua titanium concentrate which oxidized at 900 ℃ for 60 min,coupled with excessive amount of graphite powder and different kinds of additives was reduced at high temperature in argon atmosphere. The results showed that the additives could improve percent of metallization of the reduction products,and the borax was the best one. After 2%（ by mass,the same below） borax,oxidized ore and graphite powder were treated at 1 100 ℃ for 120 min,percent of metallization of the reduced products reached 94. 58%. The solidification kinetics curve of the 2% borax and oxidized ore showed that the reduction rate at the initial stage of reduction at 1 000 ℃ to 1 150 ℃ was mainly controlled by interfacial chemical reaction rate.

关 键 词：钛精矿 添加剂 固相还原 动力学 

分 类 号：TF823[冶金工程—有色金属冶金]