آخرین محصولات

Further studies on the elution of gold from activated …

activated carbon for the recovery of gold and the elution procedure developed at AARL, further elution studies C; z 0 ~ 3,0 Z IU U Z 0 u a c5 '" ~ ~ 2,0 IU 5.0 4,0.A. IlocC-99,7% Auelutod. IOOC- 99,6% Au eluted. 9Q'C- 99,6% Au eluted (dotted line-ch"ge in eluatepH) were undertaken. These studies were designed so that certain operational ...

Effect of temperature, contact time, and agitation speed …

The pronounced effect of the caustic cyanide pre-treatment step for the Anglo American Research Laboratory (AARL) gold elution process has been widely investigated, although research into the ...

Selective elution of gold, silver and mercury cyanide from activated

A high-pressure laboratory elution rig was commissioned to simulate industrial Zadra and AARL elution conditions for the stripping of gold, silver and mercury from loaded activated carbon. It was found that cyanide was essential for the efficient elution of both mercury and silver, while gold was found to elute most effectively in hot, …

Elution behaviour of metals from carbon

A laboratory-scale elution rig was commissioned to simulate Zadra and AARL carbon elution conditions, see Figure 1. The majority of the system was constructed from stainless steel tubing and Swagelok fittings. The elution column was ~600 mm long with an internal diameter of 25 mm, and a capacity of ~100 g of granulated activated carbon per ...

Carbon Stripping – Denver Mineral Engineers

With the AARL process, elution is normally proceeded by acid washing the carbon. Acid washing is used with all of the other stripping systems, but it is mentioned specifically with the AARL procedure, because AARL systems generally use the stripping vessel to acid wash and acid washing is, therefore, controlled as part of the stripping sequence ...

Carbon Elution/Strip System for precious metal recovery

Maximise gold and silver desorption from loaded carbon with FL's efficient Zadra and AARL Elution/Strip Systems.

Atmospheric Elution Process

The normal elution system for treating this carbon is an AARL Split Elution, operating at 100 deg. C. A total of 20 bed volumes (10 + 10) are required to eluate the gold down to 200-300 ppm, an elution …

The Role of Cyanide in the Elution of Gold from Activated …

This passivation, caused by the degradation of cyanide, is strongly temperature dependent. Free cyanide in the elution step of an AARL elution is of lesser importance than the cyanide in the pre-treatment step. Elution without cyanide is possible only after cold acid washing, and has been proven on plant scale._x000D_

Zadra elution circuit

Water quality is very critical for AARL elution, not so much for Zadra, but you should still use the best quality available for eluant make-up. Not process water. E/W single pass efficiency is critical for Zadra because gold not recovered is then re-circulated back to the elution column, slowing down the elution rate. Eluant flowrate is not too ...

Electrowinning

In the case of Anglo American Research Laboratories (AARL) elution, electrowinning is carried out on the complete batch of eluate produced by a single pass …

Modular Elution Circuits with Gold Room

AARL. 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.

Elution difficulties from non-cyanide leach

My suggestion is to consider the AARL elution process (more temperature, more pressure). In this kind of elution, electrowinning is performed on the complete batch of eluate produced by a single pass through the elution column. ... In the end I approached the problem as a straight scientific puzzle and, having exhausted all of the possibilities ...

Factors affecting the elution of gold cyanide from activated …

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 …

Strategies For Optimisation of Gold Processing Plants

Optimisation of the 125°C AARL elution circuit at a small high grade gold mine in PNG in 1996 increased the weekly stripping rate from 6 to 21 strips/week. This facility had been badly bottlenecking the rest of the plant as it regularly campaigned up to 30gpt Au and 200gpt Ag. ... Ensure vapour relief line proceeds straight up to the header ...

Carbon Stripping – Denver Mineral Engineers

The major processes include: (1) Atmospheric Zadra Stripping. (2) Pressurized Zadra Stripping. (3) Anglo American Research Laboratory (AARL) Method. (4) Alcohol …

The kinetics of the elution of gold from activated carbon

A high-pressure laboratory elution rig was commissioned to simulate industrial Zadra and AARL elution conditions for the stripping of gold, silver and mercury from loaded activated carbon. It was … Expand. 10. Save. Optimizing the operating conditions of gold elution and electrowinning for Tau Lekoa stream at Kopanang gold plant.

Modelling of the AARL elution process | Semantic Scholar

Semantic Scholar extracted view of "Modelling of the AARL elution process" by G. Banini et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 220,678,454 papers from all fields of science. Search. Sign In Create Free Account.

The effect of temperature on the desorption of gold …

Ada 221 (1993) 99-113 process in which warm cyanide solution is circulated through an elution column and an electrowinning cell (a U.S. Bureau of Mines invention); (b) the Anglo American Research Laboratory (AARL) method consisting of a pre-soaking step with hot caustic cyanide solution followed by elution with hot deionized water (a …

Cyanide-free AARL elutions are feasible

Several factors affecting the elution of Pt, Pd and Au cyanide complexes in a manner similar to the AARL process have been investigated. Temperature, the cyanide pre-treatment concentration and the ionic strength of the eluant have been found to affect Pt and Pd elution substantially and will be critical factors in the design of an elution process.

OneMine | A review of the AARL process for the elution of …

Parameters affecting gold elution using the AARL process are reviewed and critically analyzed in an attempt to optimise metallurgical efficiency and minimise costs in both …

The application of activated carbon for the adsorption and elution …

The elution of platinum, palladium, and gold from activated carbon (650 g/t of Pt, Pd and Au each) after pre-treatment with a caustic cyanide solution (2% NaCN, 0.55% NaOH) at an elution ...

Elution Efficiency

Thankfully the split AARL elution circuit was well run, achieved 128 degrees in hot elution, 8 bed volumes per cycle and kept up healthy cyanide and caustic doses. Other contributors to poor barren values are usually inadequate stripping temperature and reagent starvation, in that order. Also you could check the filters in the bottom of the ...

A review of the AARL process for the elution of gold from

Parameters affecting gold elution using the AARL process are reviewed and critically analyzed in an attempt to optimise metallurgical efficiency and minimise costs in both …

OneMine | Selective Elution Of Gold, Silver And Mercury …

A high-pressure laboratory elution rig was commissioned to simulate industrial Zadra and AARL elution conditions for the stripping of gold, silver and mercury from loaded activated carbon. It was found that cyanide was essential for the efficient elution of both mercury and silver, while gold was found to elute most effectively in hot, …

OneMine | Comparison of AARL and ZADRA Elution at Carlin

The AARL elution circuit, commissioned in 1988, also has the capacity to strip 24 tons of carbon per day. Two horizontal, rotating, regeneration kilns are used to reactivate approximately 60% of the stripped carbon before it is returned to the mills or leach facilities. One kiln is located in the Zadra plant, while the other is located in the ...

Modeling ofgold elution from activated carbon using a …

The eluate from the elution column was cooled by the cooling coil before discharge into the.receiving tank. Distilled water was used for each experiment as eluant.

Effect of temperature, contact time, and agitation …

The Zadra elution process and the Anglo American Research Laboratory (AARL) process are the two major elution techniques that are currently used in the industry (Marsden and House, 2006), both of ...

Cyanide-free AARL elutions are feasible | Semantic Scholar

Semantic Scholar extracted view of "Cyanide-free AARL elutions are feasible" by P. Boshoff. ... The application of activated carbon for the adsorption and elution of platinum group metals from dilute cyanide leach solutions. Journal of the Southern African … Expand. 28. 2 Excerpts; Save. Effect of temperature, contact time and agitation speed ...

ZADRA Elution Circuit Optimisation and Operational …

ZADRA elution circuit is critical. Unlike the AARL elution system, poor single pass extraction in a ZADRA process has a direct impact on the overall elution efficiency. The process was designed to ...

(PDF) Recovery of Pt, Pd and Au from a cyanide solution …

Elution of the Pt and Pd, with the AARL elution process, was found to be effective with recoveries of 95% after 5 bed volumes of eluant at the optimum pre-treatment concentrations and a ...

محصولات مرتبط

 

دفتر مرکزی

No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.

 

مرکز تماس

Phone1: 0086-21-58386256

Phone2: 0086-21-58386258

 

پست الکترونیک

[email protected]