Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

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Elution Optimisation and modelling (7 replies and 2 comments)

Rahil Khan
8 years ago
Rahil Khan 8 years ago

AARL Method of Elution is used for gold recovery at our Plant. I really want to run an optimisation test on our elution circuit and i wish I could get some help with papers concerning elution Optimisation and what will cause high barren carbon assays. Is there a way to model the AARL System at the lab?

O
Obersturmbann
8 years ago
Obersturmbann 8 years ago
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This paper is available on the net: http://is.gd/Dn0Tia . This has a lab set-up in it. I will try to send you another one that looks at Optimisation of AARL Elution specifically. When optimising the elution cycle, it is also important to consider the gold inventory that can be released from the CIP circuit in the calculation.

(unknown)
8 years ago
(unknown) 8 years ago
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1 like by Mikhail

The elution process of gold from activated carbon seems to be one of the most neglected processes within the hydrometallurgy industry. It seems that most gold plants do not change any parameters after commissioning; therefore, no further optimisation occurs. The reason for this could be the relatively complex metallurgical process that is associated with gold elution from activated carbon.

Luckily a number of foundational publications exists and are relatively easily available:

The elution of gold from activated carbon using deionised water by R. J. DAVIDSON D. DUNCANSON: http://is.gd/YTwW10

Discussion on the kinetics of the elution of gold from activated carbon by N.M. Vegter: http://is.gd/3drkqp

Elution behaviour of metals from carbon M. JEFFREY, R. PLEYSIER, and K. BUNNEY: http://is.gd/Dn0Tia

Further studies on the elution of gold from activated carbon using water as the eluant by R. J. DAVIDSON and V. VERONESE. http://is.gd/tOtODt

There is also some very good publications that are a bit more difficult to come by - however; I consider the above papers a very good start to review the elution process.

I hope this assists you to gain a greater understanding of the gold elution process. Please let me know how you go.

Rahil Khan
8 years ago
Rahil Khan 8 years ago
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Glad to have received such help. Downloaded the documents and reading through them. Will get back to you in due course!

(unknown)
8 years ago
(unknown) 8 years ago
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Is your optimisation project still on track?

Rahil Khan
8 years ago
Rahil Khan 8 years ago
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Yes. I am a bit stuck on getting the pilot circuit for elution. Modelling elution circuit is not easy from what I read in one of your papers.

(unknown)
8 years ago
(unknown) 8 years ago
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1 like by Mikhail

Get your temperature (typically between 115-130) and the eluent flow rate right. These are the main factors affecting Elution performance.

S
Eng Selemani Kilindo Salehe
2 years ago

i totally agree with you, most of time the poor elution performance is caused by temperature and flow rate as he explained above and about high barren carbon is caused by poor elution which in turn cause carbon to remain with gold

S
Standartenfurer
8 years ago
Standartenfurer 8 years ago
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I recently prepared Training Manuals for Geita Mine (AngloGold Ashanti), Tanzania, which included Elution of loaded carbon using the AARL technology, as well as the electro winning process.

Panashe
8 years ago

is there a possible way to in touch with you on general manuals for AARL process

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