(昆明理工大學(xué) 國(guó)土資源工程學(xué)院，昆明 650093)
摘 要: 圍繞鋼渣提釩的關(guān)鍵技術(shù)和難點(diǎn)，對(duì)四川某含釩鋼渣的選礦預(yù)處理及其對(duì)后續(xù)浸出的影響進(jìn)行研究。結(jié)果表明：通過(guò)磁選手段，可獲得品位為72%的鐵精礦，不僅回收了鋼渣中的鐵，而且減少了鐵在浸出液中的累積，降低了酸浸液中釩鐵分離的難度；重選預(yù)處理雖未實(shí)現(xiàn)釩的有效富集，但可脫除輕質(zhì)鈣和部分有害雜質(zhì)，避免雜質(zhì)對(duì)后續(xù)浸出的不利影響，大幅度提高釩的浸出率；與未經(jīng)預(yù)處理原料直接酸浸相比，選礦預(yù)處理后酸浸，釩的浸出率提高11%，同時(shí)，酸浸液中鐵釩濃度比也隨之降低，為后續(xù)萃取工藝提供了有利條件。
關(guān)鍵字: 含釩鋼渣；預(yù)處理；搖床重選；磁選；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
