The molten Na₂CO₃-assisted carbothermic reduction followed by water leaching is a promising process to comprehensively utilize the titanomagnetite concentrate. In this study, the effects of temperature, graphite component, and Na₂CO₃ component on the iso-carbothermic reduction of titanomagnetite in argon atmosphere were investigated. Thermodynamic analysis results speculated reduction of iron oxides in titanomagnetite concentrate in Na-Fe-Ti-C-O system at 1423 K to 1523 K were feasible, and low-valence titanium oxide was not formed with the existence of Na₂O. The iso-reaction mechanisms and kinetic analyses of Na₂CO₃-titanomagnetite, Na₂CO₃-graphite, graphite-titanomagnetite, and Na₂CO₃-graphite-titanomagnetite were investigated at 1523 K. In the roasting process of Na₂CO₃ and titanomagnetite, Na₂CO₃ destroyed the crystal structure of titanomagnetite and oxidized Fe²⁺ to Fe³⁺, generating CO gas. Thus, with the assistance of Na₂CO₃, the carbothermic reduction rate of titanomagnetite was expedited. Compared with the direct reduction process, after adding Na₂CO₃, the apparent reduction activation energy of iron oxides decreased from 165.56 to 87.25 kJ·mol⁻¹.

熔融Na ₂ CO ₃辅助碳热还原然后水浸是综合利用钛磁铁矿精矿的有前景的工艺。本研究研究了温度、石墨组分和Na ₂ CO ₃组分对钛磁铁矿在氩气气氛中等碳热还原的影响。热力学分析结果推测，Na-Fe-Ti-CO体系中钛磁铁精矿中的氧化铁在1423 K~1523 K还原是可行的，在Na ₂ O的存在下没有形成低价二氧化钛。 Na ₂ CO ₃ -钛磁铁矿Na ₂的机理及动力学分析在1523 K研究了CO ₃ -石墨、石墨-钛磁铁矿和Na ₂ CO _{3 -石墨-钛磁铁矿。在Na 2} CO ₃和钛磁铁矿的焙烧过程中，Na ₂ CO ₃破坏了钛磁铁矿的晶体结构并氧化了Fe ^{2 +}到 Fe ³⁺，产生 CO 气体。因此，在Na ₂ CO ₃的帮助下，钛磁铁矿的碳热还原速率加快了。与直接还原工艺相比，加入Na ₂ CO _3后，氧化铁的表观还原活化能从165.56下降到87.25 kJ·mol ^-1。