Gold Parting Using Nitric Acid
metallurgical contentparting of zinc and goldparting of zinc, silver, and goldparting of copper and goldsodium and goldtellurium in gold the process of parting gold with nitric acid is old, and probably dates from the discovery of nitric acid itself; it is one of the simplest parting processes, and does not require a costly plant or much manipulative skill. the main objection to it is the cost jan 25, 2008 It is definitely worth recovering. but,,,,,you will have to use mercury to extract it. My father in law had a inch dredge that he would take his black sand and put it in a cement mixer with a quart of mercury. mix all night, get the mercurygold amalgam out and retort it down.black sand deposits, which are composed of heavy metal materials such as iron and hematite, are common in areas where gold is found. while mining hobbyists typically regard the presence of black sand as an indicator of gold deposits, the sands themselves contain small particles of gold, called flour gold, and the sands are frequently processed for gold extraction.