矿石中银物相分析方法研究  

Study on methods for phase analysis of silver in ores

作　　者：孟宪伟 葛仲义 陈永红 逄文好 关国军 苏广东 范茹红 Meng Xianwei;Ge Zhongyi;Chen Yonghong;Pang Wenhao;Guan Guojun;Su Guangdong;Fan Ruhong(Changchun Gold Research Institute Co.,Ltd.)

机构地区：[1]长春黄金研究院有限公司

出　　处：《黄金》2024年第7期106-110,共5页Gold

基　　金：国家重点研发计划项目(2023YFC2907803)。

摘　　要：矿石中银物相分析是指分析银在各载体矿物中的含量,通过实验确定矿石中银物相主要包括菱锌矿中银、含铁锰矿物中银、自然银、硫化银、铁氧化物中银和硅酸盐中银6相。选取醋酸浸取菱锌矿中银,氯化钠-盐酸羟胺浸取含铁锰矿物中银,硝酸铁溶液浸取自然银,硫脲-硫酸溶液浸取硫化银,盐酸-氯化亚锡浸取铁氧化物中银,剩余残渣测定硅酸盐中银。本方法测定各相态银的相对标准偏差为0.22%~5.36%,各相态银加和与总银测定结果吻合良好,表明方法分相正确,测试结果准确度和精密度满足要求。Phase analysis of silver in ores refers to the determination of the content of silver in various host minerals.Through experimental analysis,it is established that the main silver phases in the ore include 6 types:silver in smithsonite,silver in minerals bearing iron and manganese,native silver,silver sulfide,silver in iron oxides,and silver in silicates.Acetic acid is used to leach silver from smithsonite,sodium chloride-hydroxylamine hydrochloride is used to leach silver from minerals bearing iron and manganese,ferric nitrate solution is used to leach native silver,thiourea-sulfuric acid solution is used to leach silver sulfide,hydrochloric acid-stannous chloride is used to leach silver from iron oxides,and the remaining residue is measured for silver in silicates.The relative standard deviation of this method for determining each silver phase ranges from 0.22%to 5.36%.The sum of the silver content from each phase closely matches the total silver content measured,indicating that the phase separation method is correct and the test results are accurate.

关 键 词：矿石 银 物相分析 自然银 硫化银 

分 类 号：TD926.3[矿业工程—选矿]