配碳比对TiO2真空碳热还原的影响  

Effect of Carbon Ratio on Vacuum Carbon Thermal Reduction of TiO_2

作　　者：周玉昌[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,攀枝花617000

出　　处：《钢铁钒钛》2012年第6期6-10,共5页Iron Steel Vanadium Titanium

基　　金：国家973计划资助项目,项目编号2010CB735502

摘　　要：以钛白粉和石墨为原料,开展TiO2/C真空碳热还原试验,考察配碳比对TiO2/C真空碳热反应历程和还原产物的影响。研究结果表明:TiO2/C真空碳热还原表现出阶段性反应特征,各阶段反应程度取决于配碳比;不同配碳比还原产物的表观差异在于游离碳含量及其赋存状态;随着配碳比升高还原产物颗粒尺寸减小、孔隙率增大;不同配碳比还原产物的电阻率介于2.61×10-3～4.20×10-3Ω.cm,导电性能介于导体和半导体之间。By using titanium dioxide and graphite as raw material, TiO2/C vacuum carbon thermal reduction experiments were carried out to investigate the effect of carbon ratio on the TiOJC vacuum earbothermic reaction process and the reduction product. The experimental results indicates that the reduction process exhibits a characteristic of staged reduction and the extent of reaction at each stage depends on car bon ratio; apparent differences of the reduction products obtained at different carbon ratio lie in free carbon contents and their existing state; with the increase of carbon ratio, particle size of the reduction products decreases and porosity of the product increases; resistivity of the reduction products ranges from 2. 61 x 10 -3 . cm to 4.20 x 103 Ω. cm with conductivity varvin between conductor and semiconductor.

关 键 词：TIO2 真空碳热还原 配碳比 固溶体 

分 类 号：TF823[冶金工程—有色金属冶金]