Recycling Technology of Precious Metals.
Recycling Technology of Precious Metals.
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DOI：
10.2473/shigentosozai.118.1
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
J. Shibata;Akihiko Okuda
中科院分区：
文献类型：
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作者：
J. Shibata;Akihiko Okuda
本文介绍了从含贵金属废料中分离纯化贵金属的方法。首先将含有贵金属的固体废物用含有氧化剂和配体的溶液溶解，如王水、Cl2 + HCl和NaCN + O2。通过经典沉淀法、胶结法、离子交换树脂法、活性炭吸附法、溶剂萃取法等多种方法对浸出液或废液中的贵金属进行分离。采用哪种分离方法取决于贵金属的浓度和组合。稀溶液一般采用吸附法和离子交换法，浓溶液一般采用沉淀法、胶结法和溶剂萃取法。在汽车催化剂中贵金属的回收中，等离子体熔炼法回收铜或铁金属中的铂族金属是火法冶金回收技术之一。介绍了贵金属回收的分离纯化方法的基本原理和一些工业实例。
The separation and purification methods of precious metals from the scrap containing precious metals are introduced in this review. The solid waste containing precious metals first is dissolved by the solution comprising oxidation agents and ligands, such as aqua regia, Cl2 + HCl and NaCN + O2. The separation of precious metals in the leached solution or wasted solution is carried out by using various methods like classic precipitation, cementation, ion exchange resin, activated carbon adsorption and solvent extraction. It depends on the concentration and combination of precious metals what kind of separation method is applied. Generally, adsorption and ion exchange methods are applicable to the dilute solution, while precipitation, cementation and solvent extraction are used for the concentrated solution. In the recovery of the precious metals in automobile catalyst, the collection of the platinum group metals in Cu or Fe metal melted by a plasma melting method is performed as one of the recovery techniques by the pyro-metallurgy.The fundamental of separation and purification methods, and some commercial plant examples are described for recycling of precious metals.