Role of ammonium sulfate in sulfurization flotation of azurite:Inhibiting the formation of copper sulfide colloid and its mechanism  

作　　者：Jinpeng Cai Chao Su Yinyu Ma Xingcai Yu Rong Peng Jiangli Li Xiaolin Zhang Jianjun Fang Peilun Shen Dianwen Liu 

机构地区：[1]State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Metal Resources,Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China [2]Shandong Gold Group Co.,Ltd,Jinan 250014,China [3]Yunnan Posphate Group Co.,Ltd,Kunming 650600,China

出　　处：《International Journal of Mining Science and Technology》2022年第3期575-584,共10页矿业科学技术学报（英文版）

基　　金：This research project was supported by the National Natural Science Foundation of China(No.52074138);Basic research project of Yunnan Province(No.202001AS070030);Open Foundation of State Key Laboratory of Mineral Processing(No.BGRIMM-KJSKL-2020-03).

摘　　要：In this study,the role of(NH_(4))_(2)SO_(4)during the sulfurization of azurite and its response to flotation were investigated.The flotation results showed that adding(NH_(4))_(2)SO_(4)prior to sulfurization decreased the formation of colloid in flotation pulp,and the floatability of the suppressed azurite caused by excess sodium sulfide was restored.After adding(NH_(4))_(2)SO_(4)prior to sulfurization,the formation of Cu(NH_(3))_(n) ^(2+)intermediate products changed the path of the sulfurization reaction,which slowed the direct impact of HSon the azurite surface.The nucleation rate was reduced,and the growth of copper sulfide crystal was improved.Covellite(syn,CuS)with larger crystal grains was formed on the azurite surface,thereby enhancing the mechanical stability of copper sulfide products onto the mineral surface.Therefore,the generated copper sulfide colloid significantly reduced,ultimately promoting the effective adsorption of xanthate on the azurite surface.

关 键 词：AZURITE Sulfurization flotation Ammonium sulfate COLLOID Inhibition Crystal growth 

分 类 号：TD952[矿业工程—选矿] TD923