KUYUMCULUK KÖKENLİ ARTIKLARDAN ALTIN VE GÜMÜŞÜN GERİ KAZANIMI

In this study, it was aimed to recover metallic values by gravity methods from the floor sweeping waste with high gold and silver contents, which are produced as a result of various activities in the jewelry workshops. In addition, the metallic values that remains in the slag phase after thermal process of the floor sweeping wastes were concentrated by centrifugal separators. As a result of gravity separation tests in which the floor sweeping waste subjected to shaking table, MGS (multi gravity separator) and Knelson concentrator, a heavy product (24.2% wt.) was produced with 638 g/t Au and 6227 g/t Ag grades and the metal recovery rates were calculated as 84.4% and 82.2%, respectively. The slag was first ground below 100 µm and then fed to the centrifugal separators in order to obtain fine size gold and silver particles that were trapped in the glassy phase. As a result of enrichment studies with Knelson concentrator, a concentrate (13.8% wt.) was obtained with 30 g/t Au and 52 g/t Ag grades, and the metal recoveries were found as 64.6% and 44.4%, respectively.