Gold refining with aqua regia pdf merge

For the cyanide solutions, the methods applied were aqua regia and cementation. melting blend in proportions of 1:4 until metallic gold was retrieved. Disolving with nitric acid . Funnel for burning amalgam and gold smelting Metallic mercury dissolves easily in nitric acid, and aqua regia; and. Aqua Regia. NOCl, NOx. Caustic scrubber system. Chlorine, HCl. Cl2. Caustic scrubber system. Nitric acid. NOx. Oxidise and absorb, recycle, scrubber system.This project was supported by the unit DIME and was performed between the years 2004 and 2005. Different types from coals, oils and free gold particles of