Elution and Carbon Reactivation - Resource book
adsorbing onto activated carbon. Elution is the next step in the process, whereby the adsorption of the gold cyanide complex onto carbon is reversed. Loaded carbon is removed from the CIL circuit and the gold stripped from the carbon using a number of treatment steps. The result is a solution of high gold concentration (pregnant eluate).
Ultrasonic elution of gold from activated carbon ...
The desorption of gold cyanide from carbon is the reverse of adsorption. As a consequence, the elution rate is initially controlled by mass transport occurring in macro-pores on the activated carbon surfaces, followed by a diffusion process occurring in the meso- …
ACTIVATED CARBON IN GOLD RECOVERY - Kemix
It is much easier to "concentrate up" gold from the solution phase than from the solid phase. Activated carbon is an adsorbent that increases the concentration of gold in the solution phase. For example, an ore containing 3 g/t is leached, mixed with carbon, which loads to 3 …
Factors affecting the elution of gold cyanide from ...
The elution of gold cyanide is suppressed by the presence of cations (M n+ ) through the formation of M n+ (Au(CN) 2 −) on the carbon. The horizontal position of the gold peak in an AARL elution profile was found to be a function of the elution of the cations from the carbon bed.
Carbon Stripping – Denver Mineral Engineers
Many methods are used commercially for recovering gold and silver from loaded activated carbon. The major processes include: (1) Atmospheric Zadra Stripping (2) Pressurized Zadra Stripping (3) Anglo American Research Laboratory (AARL) Method (4) Alcohol Stripping (5) Micron Elution Procedure. Each process is briefly described.
Carbon in pulp - Wikipedia
The final loaded carbon then is removed and washed before undergoing "elution" or desorption of gold cyanide at high temperature and pH. Ethanol can also be used to desorb gold from activated carbon, but safety concerns have slowed its acceptance in the gold extraction industry. Electrowinning. The elute solution, normally consisting of caustic soda (the electrolyte), cyanide and water circulates through the loaded carbon extracting gold …
Washing Activated Carbon - Mineral Processing & Metallurgy
In the process of washing activated carbon, a dilute hydrochloric acid solution (3%) is circulated/pumped into the elution column. The acid dissolves inorganic foulants such as calcium carbonate, magnesium and sodium salts, fine ore Minerals such as silica, and fine iron particles. The carbon acid wash cycle takes about 4.30 hours.
OPTIMIZING THE OPERATING CONDITIONS OF GOLD …
CHAPTER 2 LITERATURE REVIEW 2.1 The chemistry and factors affecting elution. Activated carbon is used to adsorb gold that is leached by cyanide solution. The gold is then stripped from this loaded carbon by means of elution to form a concentrated eluate which is then processed for gold recovery by electrowinning.
AARL Carbon Stripping System Operation: Elution ...
The stripping of gold from loaded carbon here involves two basic steps; Acid Washing and Elution. The elution step may be further divided into two major stages; carbon preheat and elution proper. Here a separate column is provided for acid washing.
(PDF) The Elution Of Gold From Activated Carbon At Room ...
The Elution Of Gold From Activated Carbon At Room Temperature Using Sulphide Solutions Article (PDF Available) in Journal- South African Institute of Mining and Metallurgy · August 1994 with ...
Function Of Activated Carbon For Gold Mining - Austro Carbon
The golden adsorbed on the activated carbon is retrieved from the carbon by elution, typically with a sexy caustic aqueous cyanide solution. Gold has been obtained by the system of cementation or by electrorefining of this remedy, while the carbon could be reused.
Elution behaviour of metals from carbon - SAIMM
Elution behaviour of metals from carbon M. JEFFREY, R. PLEYSIER, and K. BUNNEY Parker Centre (CSIRO Minerals), Australian Minerals Research Centre, Australia This study investigated the elution of precious and toxic metals from activated carbon. Gold and mercury are of primary interest, due to their value and environmental impact respectively.
Ultrasonic elution of gold from activated carbon, Minerals ...
Mar 01, 2003 · Ultrasonic elution of gold from activated carbon Ultrasonic elution of gold from activated carbon Feng, D; Tan, H; van Deventer, J.S.J 2003-03-01 00:00:00 The feasibility of using ultrasound to enhance the elution of gold from activated carbon was investigated. A laboratory-scale elution column immersed in an ultrasonic bath was used to investigate three eluant systems.
Recovering gold from carbon fines by a gold transfer process
Recovering gold from carbon fines by a gold transfer process Article in Minerals and Metallurgical Processing 20(1):47-51 · February 2003 with 561 Reads How we measure reads
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TECHNICAL stone - Purolite
Gold Recovery Via Activated Carbon from Cyanide Liquors Containing Cuprous ... room temperature prior to gold elution at high temperature(5). Gold-Selective Ion Exchange Resins While the Western World has been slow in adopting IX resins for gold recovery, several operations