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 it between the Refine M4 and Refine M6 MPVs within a long line of products. The second generation Refine M5 MPV was priced from 139,500 to 166,500 yuan. Refine M5 The Refine M5 (瑞風, Ruifeng M5) is a light commercial, 4-door van built by the JAC Motors (Jianghuai Auto Corporation) in China since 2002. The first generation Refine M5 MPV started out as a rebadged first generation Hyundai Starex due to the joint venture between Hyundai and JAC Motors with JAC building rebadged Hyundai Starexs under license in March 2002. The original name at launch was simply JAC Refine, later,