Antimony – CRM Alliance

A minor amount of antimony is also extracted in countries such as Bolivia Kyrgyzstan and South Africa Amounts of antimony are also extracted as a by-product of gold and base metal refining in Australia Peru Mexico Canada and the United States There is currently no primary extraction of antimony ores and concentrates in the EU Some primary ore may contain up to 200 ppm Ga Germanium - A byproduct of zinc ore processing Also a deposit in China is associated with coal Gold - The primary mineral of gold is the native metal and electrum (a gold-silver alloy) Some tellurides are also important ore minerals such as calaverite sylvanite and petzite

Processing smelting and refining gold

When gold dissolution is complete the gold-bearing solution is separated from the solids With ores of higher gold content (greater than 20 grams of gold per tonne of ore) cyanidation is accomplished by vat leaching which involves holding a slurry of ore and solvent in large tanks equipped with agitators The value of the metal an ore contains must be weighed against the cost of extraction to determine whether it is of sufficiently high grade to be worth mining Metal ores are generally oxides sulfides silicates native metals such as copper or noble metals such as gold Ores must be processed to

Effects of Gold Mining on the Environment

Some gold can be found by panning in rivers heavy gold will remain in the pan whereas lighter rocks and minerals float out This small-scale form of gold mining has little effect on the body of water but the large-scale practice of mining gold from ore can have tremendous negative effects on water quality Jan 25 2019List of Countries by Zinc Production China is the world leader of zinc production Actually Peru's main economic activity is mining of not only zinc but also gold tin lead silver and copper In the year 2013 Peru exported minerals worth $41 2 billion Sulphide zinc ores are responsible for the formation of acid rain Secondly