微波碳热还原钛铁矿扩试研究  

Pilot Research on Microwave Carbothermic Reduction of Ilmenite

作　　者：李磊[1,2,3] 朱红波[1,2,3] 张利波[1,2,3] 彭金辉[1,2,3] 贾景岩 代林晴[1,2,3] 

机构地区：[1]微波能工程应用及装备技术国家地方联合工程实验室,昆明650093 [2]非常规冶金省部共建教育部重点实验室(昆明理工大学),昆明650093 [3]昆明理工大学冶金与能源工程学院,昆明650093

出　　处：《材料导报》2015年第10期124-127,共4页Materials Reports

基　　金：国家自然科学基金(51090385;51404114)

摘　　要：在小试已获得最佳工艺条件的基础上,通过微波推板窑设备,进行微波碳热还原钛铁矿的扩大实验.钛铁矿、复合还原剂、添加剂混合物料依次经过微波推板窑的预热段、加热段、保温段,到达冷却段时,完成还原反应.实验结果表明：碳热还原温度1150℃,还原时间80 min,腔体内微负压条件下,FeTiO3中的氧化铁90％被还原成Fe,TiO2含量提高至60％～65％,TiO2、FeO、C、S、P含量都符合制备焊条药皮原料标准,微波推板窑的利用系数为25.8φ t/（m3·d）,采用复合还原剂还原每吨钛铁矿成本可降低184～490元,并且微波推板窑可以实现连续生产.Under optimum process conditions obtained from small scale test, the pilot research on microwave carbothermic reduction of ilmenite was conducted in the microwave slab kiln. The mixed material composed of ilme- nite, compound reducing agents and additive passed through the preheating zone, heating zone and heat insulation zone of the microwave slab kiln in turn. When it arrived in cooling zone, the reduction reaction had finished. The experi- mental results showed that under these conditions of reduction reaction temperature of 1150 ℃, roast time of 80 rain and the negative pressure, about 90% of the iron oxide in FeTiO3 was reduced to Fe and the content of TiO2 was raised to 60%-65%. TiO2 ,FeO,C,S and P all met the standard of welding rod. The milization factor of slab kiln was 25.8φ t/（m3·d）. Reducing per ton of ilmenite, the compound reducing agents can be reduced by 184 to 490 yuara The microwave slab kiln could achieve continuous production.

关 键 词：微波推板窑 碳热还原 钛铁矿 焊条药皮 

分 类 号：TF19[冶金工程—冶金物理化学]