Gold extraction the purity of gold. The parting of gold from silver has been done since ancient times starting in Lydia in the 6th century BC. Various techniques have been practised; salt cementation from ancient times, parting using distilled mineral acids from medieval times, and in modern times using chlorination using the Miller process and electrolysis using the Wohlwill process. Gold extraction Gold extraction refers to the processes required to extract gold from its ores. This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore. Gold mining from alluvium ores was once achieved
Refine M5 Hyundai Starex, with the front DRG being completely the same as the Starex while featuring a independently developed rear end design, replacing the tail lamps, tail gate, and rear bumper. In the first few years of its introduction, the M5 (second generation Refine MPV) was sold alongside its predecessor. The second generation Refine M5 MPV debuted as a concept named the JAC Refine IV at the 2010 Beijing Auto Show. The production car debuted at the 2011 Shanghai Auto Show in April 2011. After the establishment of the Refine brand, the JAC Refine MPV was renamed to Refine M5, positioning