镍钼矿全湿法浸出工艺研究  

Study on Hydrometallurgical Leaching of Ni-Mo Ore

作　　者：肖朝龙[1] 肖连生[1] 龚柏藩[1] 郭超[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《稀有金属与硬质合金》2010年第4期1-5,23,共6页Rare Metals and Cemented Carbides

基　　金：国家"863"高新技术研究发展计划项目(2007AA06Z129)

摘　　要：采用酸性氧化浸出-酸渣碱浸工艺对镍钼矿进行了浸出回收。结果表明：在盐酸用量为0.52 mol（每100 g原矿）,固体氧化剂N1用量为原矿质量的60%,液固比为3∶1,温度90℃左右,浸出时间2 h的条件下,镍、钼浸出率分别为92%、60%;在氢氧化钠用量为酸浸氧化后干渣质量的45%,液固比为3∶1,温度40~50℃左右,浸出时间15 min的条件下,钼浸出率可达90%以上,钼的总回收率在96%以上。该工艺流程简单、能耗较少、镍钼回收率高,可避免火法脱硫的烟气污染。Ni-Mo ore was recovered by acid oxidation leaching and then alkaline leaching of acid residue.The results show that the leaching rates of Ni and Mo are 92% and 60% respectively,when HCl dosage is 0.52 mol per 100 g raw ore,solid oxidant N1 dosage 60% mass of raw ore,liquid-solid ratio 3∶1,leaching temperature 90 ℃ and time 2 h.The Mo leaching rate can be above 90% and its total recovery over 96%,when NaOH dosage is 45% mass of the dry residue from acid oxidation leaching,liquid-solid ratio 3∶1,leaching temperature 40~50 ℃ and time 15 min.The process has the advantages of simple process flowsheet,less energy consumption,and high recovery of Ni and Mo,and it can avoid the smoke pollution problem caused by pyrometallurgical desulphurization.

关 键 词：镍钼矿 酸性氧化浸出 酸渣碱浸 固体氧化剂 工艺研究 

分 类 号：TF803.21[冶金工程—有色金属冶金]