摘要
铜锍,也称冰铜,主要成分为Cu2 S和FeS,能够捕集精矿石中金、钯、铂等贵金属,其中金、钯、铂等的测定意义重大,目前行业标准中缺少铜锍中钯、铂的测定方法。本文在铜锍样品成分分析的基础上,针对铜锍中高铜量和高硫量,优化了火试金富集参数(铜锍样品称取量10 g、无水碳酸钠加入量20 g、熔渣硅酸度为0.75、氧化铅加入量200 g、硝酸钾加入量10 g),通过加入30 mg纯银作为保护剂可以有效避免铜锍中金、钯、铂等贵金属的损失,创新性采用无水硫酸钠作为覆盖剂,并采用电感耦合等离子体原子发射光谱法(ICP-AES)同时测定贵金属合粒溶液中的金、钯、铂含量。结果表明,本方法测定金、钯、铂的相对标准偏差(RSD,n=11)分别为0.46%~3.66%、0.68%~4.68%、3.19%~4.87%;测定金属的加标回收率在97.9%~105.6%之间。本研究所建立的方法无产生明显的基体效应和谱线干扰,具有较高的准确性和可操作性,可满足企业生产过程中对于铜锍中金、钯、铂的质量控制要求和第三方检测机构的日常分析检测要求。
Copper matte,also known as matte,mainly composed of Cu2 S and FeS,can trap gold,palladium,platinum and other precious metals in refined ore,of which the determination of gold,palladium,platinum and so on is of great significance,the current industry standard lacks the determination method of palladium and platinum in copper matte.In this paper,based on the composition analysis of copper matte samples,the enrichment parameters of copper matte samples were optimized for high copper content and high sulfur content(copper matte sample weighing 10 g,anhydrous sodium carbonate content 20 g,slag silicate content 0.75,lead oxide content 200 g,potassium nitrate content 10 g).By adding 30 mg pure silver as a protective agent,the loss of gold,palladium,platinum and other precious metals in copper matte can be effectively avoided.Anhydrous sodium sulfate is innovatively used as a covering agent,and the content of gold,palladium and platinum in noble metal composite solution is simultaneously determined by inductively coupled plasma atomic emission spectrometry(ICP-AES).The results showed that the relative standard deviations(RSD,n=11)of gold,palladium and platinum were 0.46%~3.66%,0.68%~4.68%and 3.19%~4.87%,respectively.The recoveries of metal were 97.9%~105.6%.The method established in this research has high accuracy and operability without obvious matrix effect and spectral line interference,and can meet the quality control requirements of gold,palladium and platinum in copper matte production and the daily analysis and testing requirements of third-party testing institutions.
作者
吴卓葵
陈晓东
WU Zhuokui;CHEN Xiaodong(Center for Industrial Analysis and Testing,Guangdong Acadamy of Sciences,Guangzhou 510650,China)
出处
《中国有色冶金》
CAS
北大核心
2024年第6期129-137,共9页
China Nonferrous Metallurgy
基金
广东省科技专项资金(“大专项+任务清单”)新型电子废弃物中贵金属短流程提取技术研究及应用示范项目(1421969001)。
关键词
铜锍
金、钯、铂测定
火试金富集
电感耦合等离子体原子发射光谱法(ICP-AES)
覆盖剂
基体效应
谱线干扰
copper matte
determination of gold,palladium and platinum
fire assay enrichment
inductively coupled plasma atomic emission spectrometry(ICP-AES)
covering agent
matrix effect
spectral line interfernce
