多金属异型磁铁矿生产铅精矿中银含量的测定  

Determination of Silver Content in Lead Concentrate in the Production of Polymetallic Heteromagnetite

作　　者：温建安 吴慧君 WEN Jian-an;WU Hui-jun(Qinghai Hongxin Mining Industry Co.,Ltd,Golmud,Qinghai 817000,China)

机构地区：[1]青海鸿鑫矿业有限公司,青海格尔木817000

出　　处：《云南冶金》2021年第2期85-88,共4页Yunnan Metallurgy

摘　　要：采用盐酸、硝酸分解铅精矿试样,在2.5%的硝酸介质中,加入0.5%的酒石酸在抗坏血酸存在条件下掩蔽试样中的铜离子,加入0.2%硫脲与银络合,在微酸介质中生成稳定的络合物,在火焰原子吸收分光光度计测定铅精矿中银的含量。该方法的加标回收率为91%~104%,相对标准偏差为0.86%~1.30%;适用于检测银含量为(250~1000)g/t的铅精矿。The lead concentrate samples were decomposed by hydrochloric acid and nitric acid,0.5% of tartaric acid was added into 2.5% nitric acid medium for sheltering of the copper ion in sample under the condition of ascorbic acid existence,0.2% of sulfourea was added for complexing with silver,the stable complex was generated in slightly acidic medium,and the determination of silver content was done by flame atomic absorption spectrophotometer.By using the method,the recovery rate is 91%~104%,the relative standard deviation is 0.86%~1.30%,it can appropriate for determination of the lead concentrate with the silver content is(250~1000)g/t.

关 键 词：铅精矿 银 火焰原子吸收 硝酸-硫脲介质 

分 类 号：TD451[矿业工程—矿山机电]