摘要
银精矿中银量的测定,一般采用重量法,没有考虑金银合粒中的杂质元素,造成结果偏高;银精矿国家行业标准中银量的补正,采用残渣补正,流程长,比较费时。文章通过实验,对火试金富集后的金银合粒进行分析,主要的杂质元素为铜、铋、铅。金银合粒量减去金量和杂质元素铜、铋、铅总量,得到银量;文章对试样中的银量的补正方法进行改善,随同用硫化银参与实验,通过计算硫化银中银量的回收率来作系数,对银精矿样品中的银量进行补正。RSD为0.16%~1.15%之间,回收率为99.10%~100.03%之间,满足银精矿中银量的测定。
The determination of silver content in silver concentrate generally adopts the gravimetric method, without considering the impurity elements in gold and silver aggregates, resulting in higher results. For the supplement and correction of silver content in the national industry standard of silver concentrate, it is time-consuming to use residue to supplement and correct. In the paper,the gold and silver particles enriched by fire assaying were analyzed through experiments. The main impurity elements were copper, bismuth and lead. The amount of silver is obtained by subtracting the amount of gold and the total amount of impurity elements copper, bismuth and lead from the amount of gold and silver particles. In the paper, the method to correct the amount of silver in the sample is improved. With the participation of silver sulfide in the experiment, the recovery rate of silver in silver sulfide is calculated as a coefficient to correct the amount of silver in the silver concentrate sample. The RSD is 0.16%-1.15%, and the recovery rate is 99.10%-100.03%, which meets the requirements for the determination of silver content in silver concentrate.
作者
周专
ZHOU Zhuan(Daye Nonferrous Design and Research Institute Co.,Ltd.,Huangshi 430051,China)
出处
《化工管理》
2023年第4期41-44,共4页
Chemical Engineering Management
关键词
火试金
银精矿
银量
系数补正
fire assay
silver concentrate
silver content
coefficient correction
