Mineral Processing Engineering Department, Faculty of Mines, Istanbul Technical University, Turkey.
Waste Manag Res. 2021 Feb;39(2):233-241. doi: 10.1177/0734242X20931947. Epub 2020 Jul 1.
Nowadays, the production and exploration of gold has an increased importance all over the world. Recycling is a significant source for the supply of gold and has a pronounced effect on its price. The flotation method, which is more economical and more environmentally friendly than cyanide leaching, has been investigated for recycling gold and silver from jewellery slag. A jewellery slag sample containing 28.3 ppm Au and 42.0 ppm Ag was obtained from a refinery in Turkey. Flotation concentrate assaying 614.6 ppm Au and 511 ppm Ag was achieved with recoveries of 89.0% and 83.2%, respectively. On the other hand, 87.8% Au and 81.5% Ag extractions were obtained by cyanide leaching tests. Based on these results, flotation is suggested, considering its environmental and economic benefits.
如今，全世界对黄金的生产和勘探都变得更加重视。回收是黄金供应的一个重要来源，对黄金价格有显著影响。与氰化浸出相比，浮选法更经济、更环保，已被用于从珠宝废料中回收金银。从土耳其的一家精炼厂获得了一种含有 28.3ppm Au 和 42.0ppm Ag 的珠宝废料样品。浮选精矿的 Au 品位为 614.6ppm，Ag 品位为 511ppm，回收率分别为 89.0%和 83.2%。另一方面，氰化浸出试验获得了 87.8%的 Au 和 81.5%的 Ag 提取率。基于这些结果，考虑到浮选的环境和经济效益，建议采用浮选法。
