银产品生产过程中贵金属银的综合回收工艺
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摘要
本文阐述了银系列产品生产过程中贵金属银回收的价值和意义,介绍了工业上常见的火法和湿法银回收技术及其工艺路线,并比较了湿法银回收技术中不同工艺之间的区别。综合考虑不同种类银回收方法的优缺点,本文确定了硝酸溶解—NaCl沉淀—氨水络合—水合肼还原—电解的工艺路线,对银粉和AgNO_3生产过程中的含银废料进行综合回收处理。检测结果显示,通过该工艺回收得到的银粉纯度达到99.9%。
The value and significance of the recovery of the precious metal silver in the productive process of silver series products are expounded in this paper, the common technologies and process routes of the silver recovery including the pyrometallurgical process and the wet process in industry are introduced, and the differences between different processes in the wet recovering technology of silver are compared. The Advantages and disadvantages of different methods of the silver recovery through overall consideration, the processing route of dissolution by nitric acid—precipitation by NaCl—complexation by ammonia—reduction by hydrazine hydrate—electrolyzation is determined, and the waste containing silver is recovered comprehensively in the productive process of the silver powder and AgNO_3. The detection results show that the purity of the silver powder recovered by this process reaches 99.9%.
The value and significance of the recovery of the precious metal silver in the productive process of silver series products are expounded in this paper, the common technologies and process routes of the silver recovery including the pyrometallurgical process and the wet process in industry are introduced, and the differences between different processes in the wet recovering technology of silver are compared. The Advantages and disadvantages of different methods of the silver recovery through overall consideration, the processing route of dissolution by nitric acid—precipitation by NaCl—complexation by ammonia—reduction by hydrazine hydrate—electrolyzation is determined, and the waste containing silver is recovered comprehensively in the productive process of the silver powder and AgNO_3. The detection results show that the purity of the silver powder recovered by this process reaches 99.9%.
引文
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[14]夏士朋.利用硼氢化钠从含银废液中回收银[J].化学世界,1994,(7):379-380.
[15]宋建恒,郑学军.双氧水还原制备超细银粉[J].中国有色金属学报,1998,(S2):242-243.
[2]范传勇.贵金属二次资源的回收利用与展望[J].铜业工程,2014,(3):28-31.
[3]张敏宏,蒋绍洋,史建公等.废银催化剂中银的回收技术进展[J].中外能源,2010,15(1):90-98.
[4]黄美荣,李振宇,李新贵.含银废液来源及其回收方法[J].工业用水与废水,2005,(1):9-12.
[5]孙蓉,刘君玉,庄志红等.PDP废电子浆料中银的回收及其含量分析[J].西南科技大学学报,2012,27(1):25-28.
[6]王永根,费家祥.挤压型银石墨边角料银回收工艺[J].电工材料,2006,(2):6-8.
[7]张华.从富银渣中回收银的方法的研究[J].四川有色金属,2000,(1):32-35.
[8]王敏.从含银的废催化剂中回收白银[J].再生资源研究,2007,(1):12-13.
[9]张钦发,龚竹青,李景升.用硫代硫酸钠从分银渣中提取银的研究[J].贵金属,2003,24(1):5-9.
[10]浦忠民.银电解精炼工艺研究[J].有色金属(冶炼部分),2005,(5):41-42.
[11]张选冬,王欢,赵雨等.银电解废液净化工艺分析[J].黄金,2018,39(3):74-76.
[12]李伟,秦庆伟.银电解过程质量控制[J].铜业工程,2008,(1):28-30.
[13]容智梅.银电解过程中杂质的行为及其控制[J].湖南有色金属,2003,(3):16-18.
[14]夏士朋.利用硼氢化钠从含银废液中回收银[J].化学世界,1994,(7):379-380.
[15]宋建恒,郑学军.双氧水还原制备超细银粉[J].中国有色金属学报,1998,(S2):242-243.