Study On The Mechanism Of Iron Reduction And Volatilization During Vacuum Carbothermic Reduction Of Fe-Ti-O System

The thermodynamic results show that the pressure can reduce the reduction temperature and facilitate the volatilization of iron in the reduction products.Fe C₂O₄·2H₂O and TiO₂synthesize much better.The increase of reduction temperature and the extension of insulation time both promote the weight loss rate of reduced samples,the volatile rate of iron,and the metallicization rate,and are conducive to the aggregation of metal iron.After adding SiO₂,the volatile rate of iron decreases with the increase of SiO₂ addition,and the increase of the iron phase particles at the same insulation time, indicating that the addition of silicon can inhibit the aggregation and increase;under the same SiO₂ addition,the insulation time facilitates the increase of iron,and reduces the metallication rate in the reduction products.The volatile rate of iron increases with the increase of MgO addition,but the volatile rate of iron is less than the iron unadded.After MgO,Mg_xTi_3-xO₅ reduces the reduction reaction progress,inhibit the aggregation of iron;prolong the insulation time,Mg_xTi_3-xO₅,and the iron continues to grow;with the reduction time,generate(Fe,Mg)TiO₃ solid solution and reduce the metalliczation rate of the reduction sample.