关键词: 钒渣, 提钒尾渣, 中间渣, 钠化焙烧, 钒水浸率

Abstract: To solve problems in vanadium recovery with high efficiency and low consumption from vanadium-extracted tailings，taking vanadium slags from a steel company as raw material，vanadium-bearing intermediate slag was concentrated by adopting the process of the acid leaching of vanadium-extracted tailings and vanadium deposition with acid leaching solution，and then the influence of the amount of intermediate slags mixed into tailings to the sodium roasting with vanadium-bearing slag and water leaching rate of vanadium was studied. The mechanism of generating this law was discussed. The results showed that the vanadium-bearing intermediate slag replacing the vanadium-extracted tailings back to the process of vanadium extraction with sodium roasting could decrease the decomposition temperature of vanadium-bearing spinel，and reduce the degree of sintering on roasting slag. It also makes the oxidation of vanadium and promote the reaction of vanadium in vanadium-bearing spinel with Sodium carbonate to generate soluble sodium vanadate more easily,and finally realize vanadium recycling with high efficiency and low consumption.

Key words: Vanadium-bearing slag, Vanadium-extracted tailings, Intermediate slag, Sodium roasting, Water leaching rate of vanadium