Gold mining is an economic activity that involves extracting gold from the soil. There have been several ways of extracting this mineral throughout history. The extraction of gold, due to its value, has generated economic, social and historical processes throughout the world, which has made mining one of the driving forces of development in several countries. Gold extraction techniques Hit A shallow, concave vessel is used, similar to a deep dish about 25 to 35 centimeters in diameter. Years ago these containers or trays were made of metal, but now they are also used in plastic. The procedure consists of filling the container with sand and gravel containing gold, submerging it in water and shaking it. As gold is denser than sand or rock sits on the bottom of the container. Metal detector With a metal detector, a person walks around an area of exploration and receives metal signs that indicate the presence of some metal below the surface that is not always gold. The sensor can give a positive measurement of an undetermined amount of metal, up to depth of one meter below the surface. As the device is easy to operate and highly mobile, this method of prospecting is very popular among gold diggers. Process with cyanide The extraction of gold or metal with cyanide can be used in areas where there are fine rocks containing gold. The sodium cyanide solution is mixed with fine rocks, which have previously been found to contain gold and / or silver. To get them separated from the rocks in the form of gold cyanidation solution and / or silver cyanidation, zinc is added to the solution, which precipitates zinc residues and also those of desired metals such as gold and silver. . The zinc is eliminated with nitric acid or sulfuric acid, leaving the silver and / or gold bars, which are usually melted into ingots that are then sent to a metal refinery for final transformation with water to convert them into pure metals in a 99 , 9999%. Medgold was one of the first companies to use this method.
Comments