elution and carbon regeneration in gold processing

Elution and Carbon Reactivation - Resource book

ELUTION & CARBON REACTIVATION 4444 Introduction During the CIL process, gold is leached from the ore using an alkaline cyanide solution. The resulting gold cyanide complex ions are then concentrated and separated from the slurry by adsorbing onto activated carbon. Elution is the next step in the process, whereby the adsorption

Gold ore Carbon-In-Leaching (CIL) processing technology - SBM ...

The solubilized gold is simultaneously adsorbed onto coarse granules of activated carbon directly in the pulp in the so-called Carbon-In-Leach process (CIL). The loaded carbon is treated at high temperature to elute the adsorbed gold into the solution once again. The gold-rich eluate is fed into an electrowinning circuit where gold and other metals are plated out onto cathodes of steel wool. The loaded steel wool is pretreated by calcination before it is mixed with fluxes and melted.


heated at elevated temperatures in the presence of steam to create activated carbon. In gold recovery applications, activated carbon manufactured by Thermal activation is used. This process will be discussed in more detail. There are a number of steps in the production of activated carbon: Preparation of raw material

Activated Carbon in Gold Cyanidation

Activated carbon, a material produced from carbon-rich sources, offers an incredibly porous surface structure, which creates a vast surface area (about an acre per ¼ teaspoon) on which to adsorb materials. This porous structure, in combination with attraction forces, allows activated carbon to capture material components and hold on to them for later recovery.This diverse material is used throughout a number of industries to pull contaminants from liquids or gases, such as in the purification...

AARL Carbon Stripping System Operation: Elution & Electrowinning

Metallurgical ContentAcid WashingPreheat StageElution stageSequence ControllersDescription of the Carbon Stripping Process (See fig. 1)Acid Wash of CarbonTransfer to Elution ColumnReagent Addition and PreheatElution and Carbon CoolTransfer of Barren Carbon to the Regeneration Kiln HopperElectrowinningOperation of the Carbon Stripping SystemFault Finding Procedure for the Carbon Stripping ...


Elution (Gold desorption) and ElectrowiningCarbon stripping in small mining scale is combined together with electro wining. The stripping column is divided into two parts, the bottom one is elution column and the top part is electro wining cell. See picture 5 below.

The process design of gold leaching and carbon-in-pulp circuits

The carbon in the reactor into which pregnant pulp is fed (referred to as the first reactor) becomes highly loaded with gold. Loaded carbon values on operating plants range from 300 to 20 000 grams of gold per ton of carbon, a concen-trating factor of about 1 000–1 500. A portion of the loaded carbon is periodically removed from the first ...

Carbon-In-Leach | Jacobi Carbons

The activated carbon is added in leach, with gold adsorption occurring nearly simultaneously with gold dissolution by the cyanide solution. This method is often employed when native carbon (as organics) is present in the gold ore and adsorbs the leached gold, preventing its recovery.

China Vertical Activated Activated Carbon Recycle Regenerator ...

Vertical Activated Activated Carbon Recycle Regenerator of Gold Elution Plant. Working Principle. The activated carbon stored in the hopper is fed into the generator chamber and forms the carbon stream layer. The carbon generation capacity will be controlled automatically by the discharge device.

Modular Elution Circuits with Gold Room | Como Engineers

Traditional and Split AARL designs are available for the more traditional gold-cyanide elution process. OPTIONS, SUPPORT AND SPARE PARTS. All systems can be provided as complete carbon elution, regeneration and goldroom packages or you may opt to select only one of these modules.

Ansac Gold | Ansac

Ansac has an un-matched degree of experience in dealing with thermal solutions in the gold market and can match all of the key requirements of a typical process plant including elution heaters, carbon regeneration systems, bullion furnaces and drying or calcining ovens.

Carbon Stripping – Denver Mineral Engineers

The process generally takes about 48 to 72 hours. Typically the gold content of carbon is reduced from 150 oz Au/ton of carbon to less than 3 oz. Au/ton of carbon. The Zadra process is characterized by simplicity of system design and operation. Mild steel equipment is normally used. Manual control is the standard.

A review on current practices and emerging technologies for ...

Nov 01, 2019 · Activated carbon with a large surface area due to its porous structure has been widely used for adsorption. It also plays a significant role in Hg emission control from industrial flue gas streams including exhaust gases from carbon regeneration kilns in gold processing plants (Ahern, 2016; Shewchuk et al., 2016; Tong et al., 2011).

CIP/CIL Modelling - AusIMM

•Better elution (< 50 g/t) / regeneration (.90% of activity of fresh carbon in every cycle) New Plants – Minimize Costs •Optimize gold leaching and adsorption kinetics by optimizing pulp density •Optimise Number and Size of adsorption tanks •Optimize carbon inventory •Higher gold loadings (>1000:1) – minimizes elution and regen

Gross Gold Mine - Como Engineers

and construction of the elution, carbon regeneration, goldroom and carbon recovery systems of their Gross Gold project. To be located at their mine processing facility located in the Yakutiya region in the far east of Russia, where temperatures can reach -55 C. Como is responsible for the supply of the proprietary

New Developments in Ion Exchange Resins for the Recovery of ...

The elution/ regeneration process of IX resins and activated carbon are compared in the table below. The process is much simpler and less energy-intensive in the case of IX resins. Resins are stripped at relatively low temperatures of around 60 °C, while activated carbon is eluted at 120-130 °C. After elution of the gold, activated carbon ...

Carbon regeneration - Metso Outotec

The absorptive properties of activated carbon are due to the micro-porous structure of each grain resulting into large surface area per unit column of carbon. In the gold industry, activated carbon is utilized in CIP/ CIL process to transfer dissolved gold from cyanide leached slurry to elution column where gold is desorbed from the carbon.

Processing of High-Silver Gold Ores - ScienceDirect

Jan 01, 2016 · Elution of carbon is most frequently by the AARL process. Pressure Zadra has been used successfully on high-silver ores, for example at Temora, New South Wales, but it is felt that the sensitivity to gold returning to the column in the initial spent electrolyte and the lack of flexibility in throughput tends to favor the AARL approach ...

Elution behaviour of metals from carbon

the activated carbon, but only partially elutes with the gold. This partial elution compounds the treatment difficulties, since a portion of the mercury reports to the electrowinning cells, and the remainder reports to the carbon regeneration kilns. Mercury is a heavily regulated effluent from industrial processes and, in Western Australia,

Gold mineral processing - Hatch Ltd

Gold recovery and refining Companies need successful recovery methods that drive profits. Design teams with extensive experience in cyanide-in-leach (CIL), cyanide-in-pulp (CIP), carbon elution, carbon activation— in addition to newer thiosulfate leaching and regeneration processes—can enhance gold recovery and profitability.

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