The recycling of high-titanium-bearing blast furnace slag (TiO₂ > 23 wt.%) is an urgent problem that has attracted global research attention. To achieve high-efficiency, low-consumption, clean, and high value-added recycling utilization, a new process is proposed herein, which entails reacting a CH₄-H₂-N₂ gas mixture with the titanium-bearing blast furnace slag to initially produce Ti(C, N, O) at a low temperature, whereafter the product is purified and chlorinated. The effects of Fe₂O₃, urea, and sawdust on the reduction and carbonitriding characteristics are also investigated. The results indicate that the Fe₂O₃ additive can promote the formation of Ti(C, N, O), while urea and sawdust are instrumental for enhancing gas diffusion in solid powders. The proposed novel recycling process was assessed and it evinced many advantages and great feasibility.

高钛高炉矿渣（TiO ₂  > 23 wt。％）的回收是一个迫切的问题，已经引起了全球研究的关注。为了实现高效，低消耗，清洁和高附加值的循环利用，本文提出了一种新方法，该方法需要使CH ₄ -H ₂ -N ₂气体混合物与含钛高炉矿渣反应为首先在低温下生产Ti（C，N，O），然后将产品纯化和氯化。还研究了Fe ₂ O ₃，尿素和木屑对还原和碳氮共渗特性的影响。结果表明，Fe ₂ O ₃添加剂可促进Ti（C，N，O）的形成，而尿素和锯末有助于增强气体在固体粉末中的扩散。对提出的新型回收方法进行了评估，结果表明它具有许多优点和很大的可行性。