(昆明理工大学 国土资源工程学院，昆明 650093)
摘 要: 围绕钢渣提钒的关键技术和难点，对四川某含钒钢渣的选矿预处理及其对后续浸出的影响进行研究。结果表明：通过磁选手段，可获得品位为72%的铁精矿，不仅回收了钢渣中的铁，而且减少了铁在浸出液中的累积，降低了酸浸液中钒铁分离的难度；重选预处理虽未实现钒的有效富集，但可脱除轻质钙和部分有害杂质，避免杂质对后续浸出的不利影响，大幅度提高钒的浸出率；与未经预处理原料直接酸浸相比，选矿预处理后酸浸，钒的浸出率提高11%，同时，酸浸液中铁钒浓度比也随之降低，为后续萃取工艺提供了有利条件。
关键字: 含钒钢渣；预处理；摇床重选；磁选；浸出
beneficiation methods and its effect on followed leaching procedure
（Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China）
Abstract:In view of the key technique and difficulty regarding extracting vanadium from steel slag, the pretreatment of a V-bearing slag from Sichuan province by beneficiation method and its effect on the followed leaching were investigated. The results indicate that an iron concentrate with grade of 72% can be obtained by magnetic separation method, which not only helps to recover the iron from slag, but also reduces the accumulation of iron ions in the leaching solution and cuts down the difficulty of Fe-V separation; light calcium compounds and part of harmful impurities can be removed by pretreatment of gravity separation which minimizes the adverse effects of impurity on downstream leaching despite low enrichment of V. Hence, V-leaching rate increases greatly. Compared with the direct acid leaching without pretreatment, V-leaching rate after pretreatment is increased by 11%, while the concentration ratio of Fe to V in acid-leaching solution is decreased which is favorable for the followed extraction procedure.
Key words: V-bearing steel slag; pretreatment; gravity separation by tabling; magnetic separation; leaching
