Gold Smelting & Refining Process 911Metallurgist
Gold can be concentrated and recovered by applying different gold refining process methods and the final product has variable quality In this way it is Typically cupels are fabricated with magnesia calcium sulphate lime and clay and a mixture between calcium sulphate and lime clay The initial step is to preheat the cupel at 860 o C
View digital copy National Archives of Australia
View digital copy of record Title Application and specifications for registration of patent by Thomas Potter Thears titled The Victorian Gold Separator for separating gold from clay earth sand gravel or any other substance or material excepting by means of quartz crushing without employing water or any other fluid but by the agency of friction heat and air only