Research and development for direct reduction of vanadium-bearing titanomagnetite
WANG Xinyu1,2, ZHAO Haiquan2, QI Yuanhong1, WANG Feng1
1. State Key Laboratory of Advanced Iron and Steel Processes and Materials, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China; 2. School of Vanadium and Titanium, Panzhihua University, Panzhihua 617000, Sichuan, China
Abstract：Vanadium-bearing titanomagnetite is an important characteristic resource in China, and its efficient and clean utilization is of great significance. Due to its complex structure and close symbiosis of iron, vanadium, titanium and other minerals, it is difficult to smelt and utilize. At present, although iron and vanadium have been utilized by blast furnace-converter smelting vanadium-titanium magnetite, the recovery rate of vanadium resources is low, the environmental pollution is large, the operation cost is high, and the titanium resources have not been utilized. Direct reduction process can enrich vanadium and titanium while extracting iron, which is considered as a feasible process to realize comprehensive utilization of iron, vanadium and titanium. From the aspects of reduction mechanism, reduction efficiency and reduction result, different solid reducing agents and gaseous reducing agents are compared respectively, the effect and mechanism of reduction strengthening are expounded, the exploration and research progress of the new coupling process of reduction-sodiumziation-melting are introduced. Based on the concept of low carbon, energy conservation and high efficiency, the idea of applying hydrogen metallurgy technology to the reduction-sodiumziation-melting coupling process is proposed, that is, the hydrogen reduction-sodiumziation-melting coupling process, and the research content needed to be carried out. The development prospect of hydrogen reduction-sodiumziation-melting coupling process with low carbon, short flow and high efficiency is promising.
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2024, Vol. 34 
