Purification of gold are being newly separation of dust and silt and other impurities by strong water currents to remove sand and alluvial minutes, and the remaining minutes of gold in place due to the high density of gold has been used mercury to melt the gold without sand and silt. Then concludes the final gold of mercury distillation. It also draws a presentation at the copper gold and silver mining. There are chemical methods to extract gold, which tightens its way cyanide, or melt the silver alloys in concentrated sulfuric acid, being purified gold with nitric acid first, then electrolysis.
Gold is a very precious metal and a chemical element that has the symbol Au and atomic number 79 in the periodic table. The so-called natural consignment before hitting by donation. Lin, a yellow color and
shiny, use as a critique of the many peoples and civilizations and nations, as it is used in ornaments and jewelery industry. Resides in the nature of the granules body within the rocks in the river bottoms, or in the form of veins in the ground, and often there is gold with other metals such as copper, lead, and discovered the largest mass of gold in Australia in 1896, he weighed 2,280 an ounce, and the advantage of gold lack of corrosion and softness It is also more chemical elements intensity
