摘要
以粗银粉为原料,采用硝酸浸出、氯化沉银、硝酸二次溶解、浓缩结晶、烘干等工序制备硝酸银产品。通过对硝酸银制备过程,浓度控制、温度控制、试剂添加量控制、除杂提纯等因素考察,开发了从粗银粉制备分析纯硝酸银的技术路线,成功制备出符合硝酸银国家标准(GB/T 670-2007)中分析纯硝酸银要求的成品。工艺取得较好的经济效益。
With crude silver powder as raw material,silver nitrate products are prepared using nitric acid leaching,silver chloride,secondary dissolution of nitric acid,concentrated crystallization,drying and other processes.Through the silver nitrate preparation process,concentration control,temperature control,reagent addition control,de-hybrid purification and other factors,developed from the crude silver preparation analysis of pure silver nitrate technical route,successfully prepared in line with the national standard of silver nitrate(GB/T 670-2007)analysis of pure silver nitrate requirements of the finished product.The process has achieved better economic benefits.
作者
孙敬韬
刘永平
SUN Jing-tao;LIU Yong-ping(Guixi Smelter,Jiangxi Copper Corporation Limited,Guixi 335424,Jiangxi,China)
出处
《铜业工程》
CAS
2021年第2期34-39,共6页
Copper Engineering
关键词
硝酸银晶体
浓度
温度
除杂提纯
浓缩结晶
silver nitrate crystal
concentration
temperature
impurity removal and purification
concentrated crystallization
