chlorination in processing gold ore

US2283198A

US2283198A US363896A US36389640A US2283198A US 2283198 A US2283198 A US 2283198A US 363896 A US363896 A US 363896A US 36389640 A US36389640 A US 36389640A US 2283198 A US2283198 A US 2283198A Authority US United States Prior art keywords bromine gold ores bromide chlorine Prior art date 1940-11-01 Legal status The legal status is an assumption and is not a legal...

Cornstarch Replaces Cyanide In Gold Extraction Popular

May 14 2013 0183 32 Gold precious forever but especially lately is a tricky metal Bound up in consumer electronics jewelry and the ores that it comes from gold is...

sketches tables

relatively low gold grad Leaching processes however are not limited to such or The chlorination process which is obsolete by now used chlorine gas that was conducted through wet precrushed gold ore forming soluble gold chloride that could be washed out with water The dissolved gold was eventually precipitated from the aqueous...

Chlorination Tailings

201 However carefully the ore may be treated a certain portion of gold remains in the tailings varying other things being equal according to the character of the ore In case this results in part from the presence of particles too large to be entirely dissolved that portion can be extracted by re-treatment either with gas by chlorine water or by amalgamation...

The Chlorination Process

Preparation of the Ore II 8 Roasting the Ore 20 Roasting furnaces The Chlorination Process cylinder dead diameter difficult expenses extraction feet ferrous filter fine fire follows forced formed four fuel furnace given gives gold hearth heat improved impurities inch increased instance iron known labor latter leaching lead less...

How to Refine Gold 2 Major Techniques of Gold Refining

Mostly the gold obtained through gold electrolysis is usually very pure almost 99999 In fact this procedure is the best method for processing gold with the highest karatage 24 Karats = 100 percent gold This is why gold electrolysis is very common in countries where pure gold pieces are given priority over the ones with low karatage...

Chlorination process for removing precious metals from ore

This invention relates to methods for extracting precious metals from or More particularly the invention relates to a low temperature chlorination process which can in a relatively short period of time and without utilizing cyanide compounds solubilize gold silver and other precious metals contained within oxide sulfide and carbonaceous ore...

Leaching of an oxide gold ore with chloride/hypochlorite

Jun 01 2007 0183 32 Chlorine had been used to dissolve gold from ores and concentrates during the second half of the 19th century in Australia and North America At the beginning of the 20th century this process was gradually replaced by the more economical alkaline cyanide leaching Sparrow and Woodcock 1995 Nowadays however due to the realization of...

chlorination in processing gold ore

Gold Ore Chlorination - Mineral Processing Mar 16 2016 Experience has shown how difficult it is to obtain information 1982 Chlorine extraction of gold Chlorine extraction of gold Know More Oct 12 1982 0183 32 Chlorine extraction of gold of gold in the ore subjected to chlorination for recovering gold using a chlorination process wherein...

processing of gold ore

Gold Mining and Processing Everything you Need to Know The gold mining process in addition to cyanide processing gold ore is also processed with gravity separation advanced technology has enabled the amount of gold mined and processed to steadily increase over the years for example the worldwide production of gold in was metric tons as of that number had climbed to metric...

Gold cyanidation

Gold cyanidation also known as the cyanide process or the MacArthur-Forrest process is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complexIt is the most commonly used leaching process for gold extraction Production of reagents for mineral processing to recover gold copper zinc and silver represents...

Pressure chlorination of refractory gold ores

US Pat No 4 188 208 utilizes oxygenation for a period of 8 hours prior to cyanidation of the gold ore US Pat No 4 038 362 discloses a process for the pretreatment of refractory gold ores in which an aqueous slurry of the ore is first oxidized with air over a period of 8 to 24 hours and then with chlorine...

Extraction of Gold

Plattner s Chlorination-process As a preliminary step the material is submitted to an oxidizing and chlorinating roasting to convert metals other than gold into chlorid After chlorination of the gold preferably with chlorine under pressure the metal is precipitated by hydrogen sulphide or ferrous sulphate or the gold is precipitated by...

How to Leach Gold Ore With Chlorination Sciencing

Apr 25 2017 0183 32 How to Leach Gold Ore With Chlorination Aerating the mixture speeds up the leaching process because it adds oxygen Continue to agitate the bucket until the ORP meter drops to 400 Keep the ORP meter around 1 000 but do not let it drop...

Processing smelting and refining gold World Gold Council

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 The Miller process is rapid and simple but it produces gold of only about 995 percent purity The Wohlwill process increases purity to about 9999 percent by electrolysis...

Research on chlorination leaching of pressure

Jun 01 2020 0183 32 Senanayake 2004 reviewed the kinetics of gold oxidation from gold ore based on the Au 0/I/III thermodynamic studies and compared and contrasted various leaching systems However there are relatively few thermodynamic studies on the gold leaching process by the liquid-chlorination...

Gold extraction by chlorination using a pyrometallurgical

Gold ores Pyrometallurgy Extractive metallurgy abstract The feasibility to recover the gold present in alluvial material by means of a chlorination process using chlorine as a reactive agent has been studied The influence of temperature and reaction time...

CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF

substitute for chlorine For extraction of gold from the refractory ores in which gold is surrounded by sul-fide minerals oxidative pretreatment of the ore is essential to oxidize the sulfides and expose gold Pyrometallurgical oxidation by roasting is encountered with environmen-tal limitations thus hydrometallurgical methods are preferred...

Laboratory Gold Ore Chlorination Testing Procedure

Table of ContentsRoastingChlorinationLeachingTreatment of TailingsDiscussion of Test MethodTests for Quantity of Bleach and of Sulphuric AcidTreatment of the Gold...

A Method for Leaching or Dissolving Gold from Ores or

Plattner process gold was dissolved into chlorine water ie water saturated by chlorine gas while bromine water was also mentioned It was the first hydro-metallurgical process to recover gold9 Svistunov et al studying the action of chlorine water onto gold suggested that the dissolution mechanism is based on...

Chloride as an Alternative Lixiviant to Cyanide for Gold Ores

Jan 01 2016 0183 32 Chlorine was first used in recovery of gold from its ores in 1851 by Karl Friedrich Plattner who used metallic iron to cement gold from the chloride leach solution 1881 The barrel chlorination process used chlorine gas generated with bleaching powder and sulfuric acid inside a...

US4259106A

Finely-divided iron ores and concentrates which contain non-ferrous metals are roasted and chlorinated in order to vaporize the non-ferrous metals as metal chloride compounds whereby the finely-divided raw material is oxidized at an elevated temperature to produce an oxide melt with which a chlorinating reagent and air are mixed in order to vaporize non-ferrous metal chlorides from the iron...

US5074910A

The present invention is a process to recover precious metals from sulfide or It involves chlorinating a mixture of an ore concentrate and salt to form a liquid melt The salt preferably contains potassium chloride This chlorination is carried out at a temperature between 300 176 and 600 176 C while stirring The process converts precious metals in the elemental and sulfide forms into...

Mechanism and application of the ore with chlorination

Chlorination thermal treatment is one method of pyrometallurgy that solves a variety of problems related to the refractory ore extraction of metals Liu et al 2017 Cui et al 2018...

The Gold Smelting Process

Jan 18 2017 0183 32 Refining gold is simply the process of removing the finer impurities that the smelting process could not remove There are several methods used to refine gold The most common gold refining methods include 1 Miller Process This is a chlorination process that refines gold...

chlorination in processing gold ore

gold ore mineral processing equipment for sale heavy jul 8 2012 gravity separation has been applied in gold beneficiation process for a long time in the past jigging machine was used to process gold oregold extraction by chlorination using a pyrometallurgical process...

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