胺基磷酸钠在卡林型金矿高效分选中的应用  

Application of Sodium Aminophosphate in the High-efficiency Separation of Carlin-type Gold Deposits

作　　者：赵海平 刘敬智 胡学平 段文权 高立强 于梓丰 王辉 谭巧义[3,4] 刘志伟 阮仁满 ZHAO Haiping;LIU Jingzhi;HU Xueping;DUAN Wenquan;GAO Liqiang;YU Zifeng;WANG Hui;TAN Qiaoyi;LIU Zhiwei;RUAN Renman(Management Committee of Zhongguancun Science Park′s Xicheng Park,Postdoctoral Programme,Norin Mining Limited Branch,Beijing 100053,China;Norin Mining Limited,Beijing 100053,China;CAS Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;National Engineering Research Center of Green Recycling for Strategic Metal Resources,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中关村科技园区西城园管理委员会,博士后科研工作站,北方矿业有限责任公司分站,北京100053 [2]北方矿业有限责任公司,北京100053 [3]中国科学院过程工程研究所绿色过程与工程重点实验室,北京100190 [4]中国科学院战略金属资源绿色循环利用国家工程研究中心,北京100190

出　　处：《有色金属工程》2024年第6期90-98,共9页Nonferrous Metals Engineering

基　　金：国家重点研发计划(2020YFC1908805);中国科学院绿色制造创新研究院(IAGM-2019A08)。

摘　　要：卡林型金矿的高效分选是金矿回收面临的重要挑战。卡林型金矿中的金以微细粒的形式赋存于黄铁矿中,降低了晶体的有序性。早期的研究证明:氧化后的黄铁矿和白云石间会发生同质化效应,导致颗粒间的异相团聚,从而恶化卡林型金矿的分选效果。基于黄铁矿和白云石间的相互作用机理,提出了“强化分散”的原型技术,并筛选出胺基磷酸钠来实现原型技术的应用,在实验室实验中取得了良好的效果。通过浊度试验对药剂强化分散作用进行了验证,利用人工混合矿和高低品位卡林型金矿实际矿石的浮选来验证药剂在矿物分选过程中的作用。结果显示:胺基磷酸钠的加入可实现提高精矿中Fe、Au回收率,降低MgO上浮比例的预期目标,同时将Au的富集比提高到3.5左右。结果证明:胺基磷酸钠可通过强化氧化黄铁矿和白云石颗粒的分散来提高黄铁矿和白云石间的分选效率,从而优化卡林型金矿的浮选指标,该原型技术为含黄铁矿和白云石类矿物间高效分选技术的开发提供了相应的借鉴,具有推广应用的潜力。Efficient separation of Carlin-type gold deposits is a challenge for the utilization of gold ores.The majority of gold in Carlin-type gold ores occurs as invisible gold within pyrite,resulting in the poor crystallization of pyrite.The previous investigation has shown that oxidation caused the homogenization effect,thereby resulting in adhesion,thus,deteriorating the separation results of Carlin-type gold deposits.Based on the understanding of interactions mechanism between pyrite and dolomite,a technical prototype of“strengthening dispersion”to optimize the separation index of Carlin-type gold deposits was preliminarily proposed and highly selective reagents sodium amino phosphate was selected to realize the application of the technical prototype,good separation indicators have been obtained in the laboratory.In this paper,the turbidity test was used to verify the effects of selected reagents on strengthening dispersion,meanwhile,the artificial mixed ore and the real ores of high-and low-grade Carlin-type gold deposit were used to demonstrate the effect of reagent on mineral separation.The results showed that:sodium aminophosphate can achieve the expected goal of increasing the Fe and Au recovery in the concentrate,and decreasing the MgO floating ratio,while,increasing the Au enrichment ratio to about 3.5.The above results show that sodium amino phosphate can improve the separation efficiency between pyrite and dolomite by strengthening the dispersion of oxidized pyrite and dolomite particles,so as to optimize the flotation index of Carlin-type gold mine.The prototype technology provides a reference for the development of efficient separation between pyrite and dolomite minerals,and has the potential for popularization and application.

关 键 词：卡林型金矿 胺基磷酸钠 分选 黄铁矿 白云石 

分 类 号：TD923.1[矿业工程—选矿]