摘要
研究了一种从彩钼铅粗精矿碱性浸出液中回收钼的新工艺。该工艺涉及镁盐除硅、N235萃取钼、氨水溶液反萃取钼、盐酸沉淀钼等工序。试验结果表明:在溶液中ρ(Mo)=9.2g/L、ρ(SiO2)=1.01g/L,除硅温度75℃,pH=8.5,反应1h,氯化镁加入量为理论量4倍条件下,除硅率达87.31%;以15%N235-10%仲辛醇-75%煤油溶液作为萃取剂、在Va∶Vo=2.5∶1、pH为1.7～2.0条件下,混合萃取3min,钼的3级逆流萃取率为99.55%;经反萃取和沉淀钼,最终获得钼质量分数64%以上的氧化钼产品。该工艺钼回收率高,除硅效果较好。
The process for extraction molybdenum from alkaline wulfenite leaching solution was discussed. The process involved desiliconization by magnesium salt, extraction molybdenum by N235 in kerosene,stripping molybdenum by ammonia and precipitating molybdenum by HC1 solution. In the alkaline leaching solution,Mo concentration was of 9.2 g/L and SiOz concentration was of 1.01 g/L. At the conditions of desiliconization temperature of 75℃, pH of 8. 5, reaction time of 1 h and magnesium chloride dosage of 4 times to theoretical dosage, desiliconization rate was of 87. 31%. During extraetion process, the organic phase consists of 15% N235 ＋10% 2-octanol ±75 % kerosene. V, ： Vo=2.5 ： 1,water phase pH=1.7-2.0, mixture time was 3 min,three stage eountercurrent extraction,the extraction rate of molybdenum reached 99. 55%. The molybdenum oxide production was achieved. Mo content was more than 64% in the molybdenum oxide production. By the new process,reeovery of molybdenum was higher and the desiliconization rate was higher too.
出处
《湿法冶金》
CAS
北大核心
2012年第2期118-121,共4页
Hydrometallurgy of China
基金
国土资源部公益性行业科研专项经费资助项目(200811062)
关键词
彩钼铅矿
碱性浸出液
除硅
萃取
沉淀:氧化钼
wulfenite
alkaline leaching solution
desiliconization
solvent extraction
precipitation molybdenum oxide
