超声波强化低品位氧化锌矿在NH_3-(NH_4)_2SO_4-H_2O体系中的浸出  

LEACHING OF LOW GRADE ZINC OXIDE IN NH_3-(NH_4)_2SO_4-H_2O SYSTEM STRENGTHENING BY ULTRASONIC WAVE

作　　者：朱兴彩 杨坤[2] ZHU Xing-cai;YANG Kun(Yunnan Tin Vocational&Technical College,Gejiu 661000,Yunnan,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]云南锡业职业技术学院,云南个旧661000 [2]昆明理工大学冶金与能源工程学院,昆明650093

出　　处：《矿冶》2018年第1期37-40,共4页Mining And Metallurgy

基　　金：云南省教育厅科学研究基金资助性项目(2016zzx291)

摘　　要：研究了低品位氧化锌矿在NH_3-(NH_4)_2SO_4-H_2O体系中的浸出,并利用超声波进行了浸出过程的强化。结果表明,超声波能够强化低品位氧化锌矿在氨性浸出剂中的浸出。在总氨浓度为7.5mol/L,n[NH_4^+]∶n[NH_3]为2∶1,反应温度为40℃,反应时间为60 min,超声波浸出,液固比为5∶1的条件下,锌的浸出率可以达到92.1%。当NH3与(NH4)2SO4的摩尔比为1∶1时,此低品位氧化锌矿在浸出Zn2+所形成的配位化合物为[Zn(NH_3)_4]^(2+)。适当增加氨浓度及反应温度可有效提高锌的浸出率。In this paper,a process of leaching low grade zinc oxide ore in a NH3-(NH4)2SO4-H2O system strengthening by ultrasonic wave is present.The results demonstrated that ultrasonic wave can improve the leaching of low grade zinc oxide ore in ammonia solution.And under conditions of ultrasonic-wave assisted leaching,total ammonia concentrations 7.5 mol/L,2∶1 molar ratio of NH 4+and NH 3,leaching temperature 40℃,leaching 60 mins,and 5∶1 ratio of liquid and solid,the leaching rate of zinc can reach 92.1%.This low grade zinc oxide ore will chelate with ammonia forming[Zn(NH3)4]2+in the leaching process,when molar ratio of NH3 and(NH4)2SO4 being 1∶1.Increasing ammonia concentration and reaction temperature appropriately can improve leaching of zinc effectively.

关 键 词：低品位氧化锌 NH3-(NH4)2SO4-H2O体系 超声波 浸出 

分 类 号：TF813[冶金工程—有色金属冶金]