Gold extraction process

With over 300 tonnes of gold used in electronics each year, end-of-life electronic equipment offers an important recycling potential for the secondary supply of gold. With gold concentrations reaching 300-350 g/t for mobile phone handsets and 200-250 g/t for computer circuit boards, this urban mine is significantly richer than what is available in... primary ores. However, the mineralogy in scrap products is much different than in the conventional ores in a gold mine: Up to 60 different elements are closely interlinked in complex assemblies and sub-assemblies, and this requires specialised metallurgical processes with extensive offgas treatment to recover gold and a wide range of other metals cost effectively and in an environmentally sound way. Moreover, the logistics to excavate and haul the scrap products to the concentrator and further to the smelter are much more challenging than in the primary supply chain. Currently, only a small portion of old products is collected and directed into state-of-the art recycling chains. Significant improvements are needed here to fully utilise this secondary metal resource. Recovering Gold Fingers from Computer SCRAP Gold Fingers - How to Recover Gold from Electronic Scrap If you recall, when scrapping computers and other electronic equipment, we encounter a lot of peripheral cards which has Gold plated male slot contacts, i.e. the fingers When scrapping computers you will often come across wonderful gold encrusted components. (In reality, they are only gold plated.) These gold components are, despite appearances, not ripe with gold. Yes, refining gold fingers is easier than refining ore, but that doesnt mean it is full of gold. It will take hundreds of pounds of computers to get even close to an ounce of gold. Each 1kg of gold fingers usually has 1-4 grams of gold. Gold recovery memory SD card adapter micro, miniSD, microSD scrap Rapid global technological development has led to the rising production of electronic waste that presents both challenges and opportunities in ...Read More