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
Past in Different Ways to Michael Kiske, Past In Different Ways "on one hand shows that I don't reject my past just because I'm a different person today, and on the other hand it can maybe give people who were part of that past a different view at those songs. It's my music, I can still identify myself with its spirit...I generally brought each song down to its basics, threw out useless weight and sometimes changed the key to make them sound better as acoustics; and I was surprised how well they worked like that". It was released on 9 May 2008 with cover