Methods for recovering precious metals from industrial waste

International Conference on Applied Sciences 2015

Canda, L.^1 ; Heput, T.^1 ; Ardelean, E.^1

Politehnica University of Timisoara, Department of Engineering and Management, 5 Revolution Street, Hunedoara

331128, Romania^1

关键词: Carbon based catalysts;    Communications equipment;    Economic viability;    Electrical and electronic equipment;    Industrial catalyst;    Manufacturing plant;    Platinum group metals;    Secondary sources;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/106/1/012020/pdf
DOI  :  10.1088/1757-899X/106/1/012020

来源: IOP

【 摘 要 】

The accelerated rate of industrialization increases the demand for precious metals, while high quality natural resources are diminished quantitatively, with significant operating costs. Precious metals recovery can be successfully made from waste, considered to be secondary sources of raw material. In recent years, concerns and interest of researchers for more increasing efficient methods to recover these metals, taking into account the more severe environmental protection legislation. Precious metals are used in a wide range of applications, both in electronic and communications equipment, spacecraft and jet aircraft engines and for mobile phones or catalytic converters. The most commonly recovered precious metals are: gold from jewellery and electronics, silver from X- ray films and photographic emulsions, industrial applications (catalysts, batteries, glass/mirrors), jewellery; platinum group metals from catalytic converters, catalysts for the refining of crude oil, industrial catalysts, nitric acid manufacturing plant, the carbon-based catalyst, e-waste. An important aspect is the economic viability of recycling processes related to complex waste flows. Hydrometallurgical and pyrometallurgical routes are the most important ways of processing electrical and electronic equipment waste. The necessity of recovering precious metals has opened new opportunities for future research.