Chlorination was the most popular process to extract gold before it was rendered obsolete with the advent of the cyanidation process at the turn of the last century not least because it required the use of potentially hazardous and costly chlorine to oxidizecomplex the gold
Apr 25 2017· How to Leach Gold Ore With Chlorination The use of chlorine is both the cheapest and most plentiful method for leaching gold When you mix sodium chloride and hydrochloric acid together you produce a form of electrolysis that removes gold from rock and soil Aerating the mixture speeds up the leaching process because it adds oxygen
Dry Chlorination Chlorination Process for Gold This process was based on the fact that chlorine in the presence of moisture converts gold into the trichloride AuCl3 which is soluble in water and removed by washing the gold being then precipitated by ferrous sulphate sulphur dioxide hydrogen sulphide or
May 26 2015· The MILLER CHLORINATION PROCESS patented in Britain in 1867 is an industrialscale chemical pyrometallurgical process whereby either gold ore or dore gold is heated in furnace crucibles The process is able to separate gold from impurities by using chlorine gas which is added to the cru cibles once the gold is molten
In order to purify gold and remove the silver from it by any process analogous to the cementation with nitre or salt in a reasonable time the alloy must be in such a fine state of division that the silver will be removed almost instantly or diffusion must be assisted by actually keeping the alloy in a molten state Nitric acid the active ingredient in the first cementation process described
Gold Extraction By Chlorination Using A Pyrometallurgical The fact that gold chlorination is reached at lower temperatures might be explained by the formation of binary gold chloride in the vapor phase which might be extracted from the reaction zone heinen and eisele 1974 habashi 1986 Online Chat Gold Extraction By Chlorination Using A
recovery of silver and gold from copper anode slimthe recovery of silver and gold in pyrometallurgical processes is influenced in part by the slag and matte pyrometallurgy roastingsmeltingrefining process gold pyrometallurgical 20 results use add new topic to ask a new question discussion about pyrometallurgy and prior to
Gold extraction by chlorination using a pyrometallurgical Results indicate that gold extraction is favored by increasing both the temperature and the reaction time The best recovery values were of 9823 at 873 K and 3600 s and of 9873 at 873 K and 5400 s with very low attack of the matrix containing the metal
Pyrometallurgy involves high temperature processes where chemical reactions take place The cost of extraction must be weighed against the metal value contained in the rock to determine which ores should be processed and which ores are of too low a grade to be worth mining Gold Ore High grade gold ore from a quartz vein near Alma Live Chat
The two gold refining methods most commonly employed to derive pure gold are the Miller process and the Wohlwill process The Miller process uses gaseous chlorine to extract impurities when gold is at melting point impurities separate into a layer on the surface of the molten purified gold
process iii electrowinning and iv ionexchange solvent extraction Traditionally MerrillCrowe process was used to remove gold from a cyanide solution by using zinc dust to precipitate gold from its solution Carbon adsorption is increasing using in newer plants for gold
EP0020826A1 EP79301148A EP79301148A EP0020826A1 EP 0020826 A1 EP0020826 A1 EP 0020826A1 EP 79301148 A EP79301148 A EP 79301148A EP 79301148 A EP79301148 A EP 79301148A EP 0020826 A1 EP0020826 A1 EP 0020826A1 Authority EP European Patent Office Prior art keywords gold tellurium selenium silver process Prior art date 19790614 Legal status The legal
Mar 01 2009· Gold extraction by chlorination using a pyrometallurgical process The influence of temperature and reaction time was studied through changes in the reactant solid The techniques used to characterize the mineral samples and the reaction residues were stereomicroscopy Xray diffraction Xray fluorescence and scanning electronic microscopy
gold extraction chlorination using pyrometallurgical process Gold Mining Process Equipment Lead has a high affinity for gold and can be used as a collector for gold in pyrometallurgical Copper can be separate from gold Gold extraction by chlorination using a pyrometallurgical process from refractory minerals and alloys Gold
Simple method for extracting gold from electrical and electronic wastes using hydrometallurgical process Mohammad Aali Dehchenari1 Saeed Hosseinpoor2 Rahim Aali3 Nilowfar Salighehdar Iran4 Mohsen Mehdipour5 1BSc of Mechanic EngineeringYoung Researchers and Elite Club Majlesi Branch Islamic Azad University Isfahan Iran 2Instructor of Civil Engineering – Structure Department of
Gold extraction refers to the processes required to extract gold from its ores This may require a combination of comminution mineral processing hydrometallurgical and pyrometallurgical processes to be performed on the ore
Metal Extraction Through Chlorine Metallurgy Gold extraction by chlorination using a pyrometallurgical process by means of a chlorination process using chlorine
pyrometallurgical extraction of gold extraction of gold from igun gold ore deposit pyrometallurgical extraction of gold extraction of gold from igun gold ore deposit MTM Extraction of gold from Igun gold ore the free encyclopedia Gold extraction or recovery and pyrometallurgical processes to be flowsheet for the extraction of gold using sodium cyanide process nonmetallurgical
USAChlorine extraction of goldGoogle A process for treating a particulated gold bearing ore to recover the gold therein is disclosed The process includes roasting the ore to remove sulfides as sulfur dioxide followed by chlorination of the ore at a temperature of about C in the presence of iron to form a mixture of volatile gold chlorides and volatile goldiron chlorides in the
