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chlorination gold recovery:

Gold Chlorination Processes & Methods

Aug 31, 2016 · In Liddell’s Handbook of Nonferrous Metallurgy, Vol. 2, 1945, there is to be found a very complete account of the uses of chlorine as applied to the recovery of gold and silver, in Chlorination Processes & Methods.Introducing the chapter entitled “Chlorine Metallurgical Processes” Liddell says:

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(PDF) Gold recovery from WEEE by chlorine system

The experimental results showed that the gold recovery could be over 90 %. For the kinetics analysis of the cementation, the activation energy value was found to be 19.51 kJ·mol–1. View

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CA2025116A1 - Method for gold recovery using chlorine ...

CA2025116A1 CA002025116A CA2025116A CA2025116A1 CA 2025116 A1 CA2025116 A1 CA 2025116A1 CA 002025116 A CA002025116 A CA 002025116A CA 2025116 A CA2025116 A CA 2025116A CA 2025116 A1 CA2025116 A1 CA 2025116A1 Authority CA Canada Prior art keywords chlorine dioxide ore metal solution gold Prior art date 1989-09-18 Legal status (The legal status is an

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Gold extraction by chlorination using a pyrometallurgical ...

Mar 01, 2009 · The direct chlorination of a pure gold was also studied up to a temperature of 1223 K.These experiments demonstrated that the precious metal is not attacked at that temperature, in agreement with the literature, which indicates that the reaction of direct chlorination of gold is produced at high temperatures (Panias and Neou-Syngouna, 1990).The fact that gold chlorination is reached

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US4723998A - Recovery of gold from carbonaceous ores by ...

A gold recovery process is disclosed in which the gold content of ores, including carbonaceous ores or mixtures of carbonaceous and oxide ores, is extracted by a simultaneous chlorine leach and ion exchange resin adsorption procedure. The process eliminates or reduces the degree of oxygenation and cyanidation required to conduct a standard gold extraction process.

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(PDF) Gold recovery from WEEE by chlorine system

The experimental results showed that the gold recovery could be over 90 %. For the kinetics analysis of the cementation, the activation energy value was found to be 19.51 kJ·mol–1. View

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Gold extraction by chlorination using a pyrometallurgical ...

Mar 01, 2009 · The direct chlorination of a pure gold was also studied up to a temperature of 1223 K.These experiments demonstrated that the precious metal is not attacked at that temperature, in agreement with the literature, which indicates that the reaction of direct chlorination of gold is produced at high temperatures (Panias and Neou-Syngouna, 1990).The fact that gold chlorination is reached

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Recovery and kinetics of gold and iron from cyanide ...

The experiment on recovery of gold and iron by one-step chlorination-reduction roasting in the muffle furnace was conducted using cyanide tailings from a gold smelting enterprises (Henan Province, China) as research object.

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Recovery of gold from sulfide refractory gold ore ...

A complete process of gold recovery from sulfide refractory gold ore was proposed. • The recovery efficiency of Au was increased by adding pyrite during the chlorination roasting. • The maximum recovery efficiency of gold reached 98.06% under optimal condition.

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Gold Chlorination Process by Miller

Jul 08, 2015 · Gold Chlorination Process by Miller. Miller’s Gold Chlorination process was introduced by F.B. Miller. The refining process employs chlorine gas, which passed into molten gold covered with a layer of borax and silica, and reacts with most of metals present in the molten charge. Platinum group metals do not react.

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US4353740A - Chlorine extraction of gold - Google Patents

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 350° C. in the presence of iron to form a mixture of volatile gold chlorides and volatile gold-iron chlorides in the chlorine off gases followed by condensing ...

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The Chlorination of Gold Ores. - Digitised Collections

The Chlorination of Gold Ores. By Mr. Donald Clark, M.M.E., B.C.E. The ideal method for extracting fine gold would be to dis-solve out the gold with some solvent which would not attack other minerals present. The solvents known 6o years ago were chlorine, bromine, and cyanide of potassium. Yet in

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Extraction of Gold from Gold Chloride Solution by the ...

Nov 23, 2021 · The recovery of gold from copper anode slime has been paid increasing attention by researchers at home and abroad. To realize the higher reduction rate of gold and purity of gold powder, a novel technology is proposed for reducing gold chloride solution by controlling potential in this work. First, the effects of excess coefficient of Na2SO3, reaction temperature, reaction time and initial H+ ...

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Chlorination Leaching of Refractory Ores - Hydrometallurgy ...

Leaching of gold in chlorine media was industrially practiced before cyanide was used for this purpose. As such the chemistry is actually well documented: Gold leaching Oxidation reaction: Au + 4Cl- = Au(Cl)4- + 3e. Reduction reaction: 1.5Cl2 + 3e = 3Cl-Other metals All metals will leach in

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History – Trilogy Refinery

Chlorine was first used to recover gold from residues from amalgamation. Later, in the 1880’s Chlorination was used in big mining operations in the American and Australian gold fields. At the present time unfortunately chlorination for gold recovery is used on extremely small scale where gold is a minor constituent with other precious metals.

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US4941917A - Process for recovery of precious metals from ...

239000010931 gold Substances 0.000 claims abstract description 70 Carbonaceous ore containing a precious metal (gold) is treated with an aqueous solution of chlorine dioxide to enhance the recovery of the precious metal.

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extracting gold through chlorination | Prominer (Shanghai ...

Gold Chlorination Processes and Methods - 911 Metallurgist17 Mar 2017 Coarse gold requires long contact and should be removed by amalgamation. Chlorination was suggested by Percy and by Plattner independently in 1848, though Cottrell precipitation is required for complete recovery. Get Price

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Chlorine extraction of gold - DUNN; WENDELL E.

The chlorination reaction may be conducted under pressures of 1 to 2 atmospheres, absolute. In order to obtain the maximum recovery of gold from the ore, staged reactors may be used. The amount of chlorine consumed to made gold by-products is small since the amount of gold in the ore is generally small. Excess chlorine is used in the process.

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gold refining process at home by acid aqua regia dissolves ...

I shot this video, 2009, quite a long time ago.Aqua regia is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is...

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Chlorination process for recovering gold values from gold ...

A process for the recovery of precious metal values as essentially pure gold from gold alloys in the form of thin strips 0.05 to 0.25 inch thick having a gold content of up to 80% gold comprising chlorinating the strips at a temperature of 300 to 700 degrees Centigrade to form a metallic gold/metal chloride mixture and removing the metal chlorides from the gold in the mixture using an aqueous ...

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The recovery of gold from refractory ores by the use of ...

Recently, the U.S. Bureau of Mines examined the recovery of gold by chlorination of refractory carbonaceous and sulfidic ores, comparing various treatment methods in which a ground ore pulp is contacted with chlorine gas and activated carbon is added to the pulp for a carbon-in-chlorine leach (CICL). The objective of this research was to demonstrate the basic feasibility of CICL technology ...

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Gold Chlorination Process by Miller

Jul 08, 2015 · Gold Chlorination Process by Miller. Miller’s Gold Chlorination process was introduced by F.B. Miller. The refining process employs chlorine gas, which passed into molten gold covered with a layer of borax and silica, and reacts with most of metals present in the molten charge. Platinum group metals do not react.

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Gold Recovery from WEEE by Chlorine System | Scientific.Net

Gold Recovery from WEEE by Chlorine System. Article Preview. Abstract: This work compared the effect of nitric acid and chloride acid systems on dissolving precious metals of Electrical and Electronic Equipments (EEE). As a result of the revolution of informatics technology, the production of EEE is rapidly increasing in the world.

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CN101225468B - Method for recovering gold, silver, iron ...

The invention discloses a method to recover the gold, silver, iron and lead from the acidiation roasted cinder by a magnetic chlorination method, which is characterized in that the method comprises two sections, one is that the gold, silver, lead, and copper in the cinder are volatilized as a chloride gas through the high temperature chlorination roasting, and the gold, silver, copper and lead ...

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recovery of gold from ores with chlorine in 1898 | Page 2 ...

May 05, 2013 · Chlorination. I - from the "Australian Town and Country Journal (NSW)" January 31, 1891 The chlorination process of extracting gold From its matrix, and from from concentrates, is freely alluded to in newspapers and amongst miners; and yet, as a rule, the principle is but vaguely understood, even by men who make mining their business.

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Gold extraction by chlorination using a pyrometallurgical ...

The chlorination equipment used in the laboratory has a simple design and permits a safer use of chlorine gas. References Deng, H., Li, X., 1987. Chloride roasting of a complex gold ore and treatment of chlorine fume for precious-metal recovery-experimental results. Transactions Institution of Mining and Metallurgy (C: Mineral Processing Extractive

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Roasting and Chlorine Leaching of Gold Bearing Refractory

The aim of the present work is to improve the efficiency of gold recovery from refractory ores or industrial wastes difficult to be treated by conventional process of cyanidation. The alternative process selected, i.e., chlorination, may allow the sustainability of gold extraction both for environmental (reduction of reagents

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Extraction of Gold from Gold Chloride Solution by the ...

Nov 23, 2021 · The recovery of gold from copper anode slime has been paid increasing attention by researchers at home and abroad. To realize the higher reduction rate of gold and purity of gold powder, a novel technology is proposed for reducing gold chloride solution by controlling potential in this work. First, the effects of excess coefficient of Na2SO3, reaction temperature, reaction time and initial H+ ...

Read More
Mechanism and application of the ore with chlorination ...

Sep 22, 2021 · Under the best conditions, roasting tailings with 5 wt% CaCl2 at 1273 K yielded an 85.99 wt% gold recovery and 82.84 wt% chlorine removal. Thus, the harmless management of

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Extraction of Gold

The recovery of the gold is effected similarly, and the bromine is then liberated by the action of chlorine, but it is impossible to prevent loss of bromine. Cyanide-process The extraction of gold by the cyanide-method is of great technical importance.

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Gold Recovery 101 - Sepro Systems

Gold Recovery 101 Gold can be found in almost everything we see and touch; there are several important industrial uses for gold in electronics, dentistry and aerospace; however, almost 80% of gold ends up being used for jewellery. While jewellery is the end of the road for most mined gold, there are many ways it occurs in nature.

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extracting gold through chlorination | Prominer (Shanghai ...

Gold Chlorination Processes and Methods - 911 Metallurgist17 Mar 2017 Coarse gold requires long contact and should be removed by amalgamation. Chlorination was suggested by Percy and by Plattner independently in 1848, though Cottrell precipitation is required for complete recovery. Get Price

Read More
Gold Extraction by Chlorination Process - YouTube

Modern technology has improved the process of using chlorine as a method to dissolve gold. Resin technologies have virtually eliminated the early problems as...

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