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 M6 updating the grilles, placing the Refine M6 more inline with the other JAC Refine products. Refine M6 The Refine M6 is a minivan produced by Chinese auto maker JAC under the Refine sub-brand since 2013. Despite its dimensions being smaller than the Refine M4, it is the most premium Refine MPV, sitting above the Refine M3, Refine M4, and Refine M5 making it the flagship of the Refine brand. According to the official website, pricing for the Refine M4 ranges from 239,500 to 349,500 yuan, positioning the Refine M6 above the Refine M5. The design of the Refine M6 is