含稀土磷精矿酸解过程稀土的分布规律  

Distribution of RE during Acid Leaching of RE-bearing Phosphorus Concentrates

作　　者：赵平[1] 金会心[2,3] 毛小浩[2,3] 王眉龙 杨松[2] 郑晓倩[2] 

机构地区：[1]贵州省地质矿产中心实验室,贵阳550000 [2]贵州大学材料与冶金学院,贵阳550025 [3]贵州省冶金工程与过程节能重点实验室,贵阳550025

出　　处：《有色金属（冶炼部分）》2015年第11期33-35,共3页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51364005);贵州省地矿局基金项目(黔地矿科合[2014]05)

摘　　要：研究了富集稀土的磷精矿酸浸过程在不同溶液初始磷酸浓度和液固比浸出时稀土的富集及分布规律。结果表明,高的初始磷酸浓度和液固比有利于提高稀土在溶液中的回收率,但稀土在溶液中的富集程度随液固比的增加先增加后降低。最佳浸出条件为:溶液初始磷酸浓度25%、硫酸过量系数1.0、液固比6、反应温度75℃、反应时间3h、矿浆浓度58%,在此条件下,∑REO的总回收率达到68.01%,P2O5总的回收率达90%以上。Enrichment and distrih concentrates under different i ution of rare earth （RE） during acid leaching of RE-hearing phosphorus ial phosphoric acid concentration and ratio of liquid to solid （L/S） were investigated. The results show that high initial phosphoric acid concentration and L/S can improve recovery of RE from solution, but enrichment RE in solution tends to rise firstly and then drop along with rising of L/S. Total recovery of ∑REO and P205 is 68.01% and 90% above respectively under the optimum leaching conditions including initial phosphoric acid concentration of 25 sulfate of 1.0, L/S of 6, reaction temperature of 75℃, reaction duration of 3 h, of 58%. , excessive coefficient of and slurry concentration

关 键 词：磷精矿 稀土 酸浸 回收率 

分 类 号：TF845[冶金工程—有色金属冶金]