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widely used waste circuit board from Gold manufactory of China

Current Status on Leaching Precious Metals from Waste

Current research on leaching precious metals from waste printed circuit boards (PCBs) in the world is introduced. In the paper, hydrometallurgical processing techniques including cyanide leaching, thiourea leaching, thiosulfate leaching, and halide leaching of precious metals are addressed in detail.

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Thiourea leaching gold and silver from the printed circuit

The waste circuit board samples of mobile phones used in the leaching were obtained from a local electronics shop in Qingdao, China ().For experimental use, the scraps were shredded using stainless steel blades and pliers after manually removing the main electronic components (e.g. capacitors, batteries and resistors), and then crushed by the sealed universal pulverizer (GJ-2) for 8 min.

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Hydrometallurgical Recovery of Metals from Large Printed

 · The recovery of precious metals from waste printed circuit boards (PCBs) is an effective recycling process. This paper presents a promising hydrometallurgical process to …

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Leaching of gold and silver from printed circuit board of

Currently, the most commonly employed method for the extraction of gold and silver in ores, is cyanidation (Syed, 2006 and Chu et al, 2003). Therefore, this process could be used for the extraction of metal in printed circuit boards (Kasper et al, 2012 and Öncel et al, 2005).

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A Novel Designed Bioreactor for Recovering Precious Metals

 · For recovering precious metals from waste printed circuit boards (PCBs), a novel hybrid technology including physical and biological methods was developed. It consisted of crushing, corona-electrostatic separation, and bioleaching. Bioleaching process is the focus of this paper. A novel bioreactor for bioleaching was designed.

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E-Waste Recycling TechnologiesWIPO

waste innovation points strongly to the commoditization of electronic waste; in particular as a source of high value materials, such as rare earth metals (e.g. lanthanum, neodymium and praseodymium) that are commonly used in modern electronic items. A similar trend is also shown for noble metals, in particular silver, but also gold and platinum.

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Copper Extraction from the Discarded Printed Circuit

waste management systems by optimizing the value added and improve the effectiveness of collection and recycling systems. References 1. Kui Huang, Jie Guo and Zhenming Xu printed circuit board: A review of current technologies and treatment status in china, J. of hazardous management Jhazmat, (2008) 2. Masavetas, Nikola O.U, Spanou, Pavlatou

Evaluating waste printed circuit boards recycling

 · Rapid generation of waste printed circuit boards has become a very serious issue worldwide. Numerous techniques have been developed in the last decade to resolve the pollution from waste printed circuit boards, and also recover valuable metals from the waste printed circuit boards stream on a large-scale. However, these techniques have their own certain specific drawbacks that …

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