TiC was examined as a starting material for Ti metal production by sulfidation and electrochemical reduction in molten salt. The sulfur evaporation temperature, sulfidation temperature, and time were optimized in a dual-zone furnace for the efficient and sustainable formation of TiS2 as well as carbon removal from TiC by S2 gas sulfidation. A mixture of TiS2 and Ti2.45S4 powders was synthesized from TiC at 1200 °C, and a perfect carbon removal was achieved to a very clean level as low as 0.025 mass pct C. The sulfides derived from TiC were then electrochemically reduced in molten CaCl2-0.5 mol pct CaS salt. The spherical shape Ti powder consisting of high-purity Ti sheets was obtained from TiS2 without the carbon contamination. This method might be applied for sustainable recycling of waste carbides and for production of low-cost Ti powders via TiC or TiOxCyNz from the titanium ore.

中文翻译：

---

从 TiC 生产 Ti 和 TiS2 的可持续方法

TiC 被用作在熔盐中通过硫化和电化学还原生产 Ti 金属的起始材料。在双区炉中优化硫蒸发温度、硫化温度和时间，以有效和可持续地形成 TiS2 以及通过 S2 气体硫化从 TiC 中去除碳。TiS2 和 Ti2.45S4 粉末的混合物在 1200 °C 下由 TiC 合成，并且实现了完美的碳去除，达到了低至 0.025 质量 pct C 的非常清洁的水平。然后将源自 TiC 的硫化物在熔融 CaCl2 中电化学还原-0.5 mol pct CaS 盐。由高纯度 Ti 片组成的球形 Ti 粉末是从没有碳污染的 TiS2 中获得的。