A new concept for producing highly pure Ti metal powder from ilmenite (FeTiO₃) is proposed in this article. Titanium nitride (TiN) or titanium oxycarbonitride (TiO_xC_yN_z) could be synthesized in the first step via the simultaneous carbothermal reduction and nitridation (CTRN) of FeTiO₃ to remove oxygen roughly. To separate oxygen completely, high-quality TiS₂ samples were then synthesized from TiN and TiC using S₂ gas, and the clean sulfides were finally reduced to α-Ti powders with spherical morphology using electrolysis in molten CaCl₂. X-ray diffraction (XRD), scanning electron microscopy (SEM) in conjunction with energy-dispersive X-ray spectroscopy (EDS), and elemental LECO analysis were used to study the phases and microstructures of the sulfides and the electrochemically reduced powders. The Ti powder showed no carbon contamination and consisted of high-purity foil-like Ti sheets with very low oxygen, carbon, and nitrogen contents of less than 0.15wt% O, 0.02wt% C, and 0.003wt% N, respectively. The quality of the Ti powder was much higher than that of the powder obtained using the conventional OS process (proposed by K. Ono and R.O. Suzuki) starting directly from the oxides.

本文提出了一种从钛铁矿（FeTiO ₃）生产高纯钛金属粉末的新概念。第一步，可通过同时进行碳热还原和氮化FeNO ₃（CTRN）粗略地除去氧气来合成氮化钛（TiN）或碳氮氧化钛（TiO _x C _y N _z）。为了完全分离氧，然后使用S ₂气体从TiN和TiC合成高质量的TiS ₂样品，最后在熔融CaCl _2中电解将纯净的硫化物还原为球形的α-Ti粉末。。X射线衍射（XRD），扫描电子显微镜（SEM）结合能量色散X射线光谱（EDS）和元素LECO分析被用来研究硫化物和电化学还原粉末的相和微观结构。Ti粉没有碳污染，由高纯度的箔状Ti片组成，氧，碳和氮的含量极低，分别小于0.15wt％的O，0.02wt％的C和0.003wt％的N。Ti粉末的质量远远高于直接从氧化物开始使用传统OS工艺（由K. Ono和RO Suzuki提出）获得的粉末质量。