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·The elution plant and goldroom completes the CIL/CIP/ CIC circuit enabling stripping of gold from loaded carbon electrowinning into gold sludge and drying and smelting of sludge into dor bars Carbon can then be reactivated for reuse in the circuit Metso Outotec s turnkey process plant solution includes
·The carbon is recovered through the acid wash process/column to clean it from contaminants then flown into an elution column In the elution circuit a solution that contains caustic soda NaOH and cyanide is run through the carbon bed to take the gold off the carbon into that solution
·So first the gold is dissolved in the cyanide slurry then it is adsorbed onto the activated carbon and the final stage is getting the gold off the activated carbon That is called elution Q How does elution work A The carbon with the gold adsorbed on it is placed into a vessel called an elution column
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·Cyanide is a lixiviant or reagent that is used to leach often in tanks gold from a solid matrix and form a gold cyanide complex The gold cyanide complex 911 Metallurgist is a trusted resource for practical insights solutions and support in mineral processing engineering helping industry professionals succeed with proven expertise
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·Assuming that a gold ore has been effectively ground to ensure maximum economic liberation of gold the circuits that will have the most effect on the successful operation of a gold plant will be that of the leaching and carbon in pulp circuit CIP The reagent and utilities operating costs associated with leaching adsorption elution and
·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 High temperatures and intense cyanide pre treatment conditions favourable for desorption decreased the sensitivity of gold elution to flow rate and the radial distribution of the gold through
·Product description The adsorption column is a device that adsorbs gold from heap leach noble liquid with activated carbon as the medium Activated carbon is a porous material with special adsorption properties Adsorption and Elution Column Adsorbent Activated carbon Number of adsorption columns PCS 2 6 Number of adsorption columns m
·In the case of Zadra elution where the electrowinning cell is in series with the elution column the column and cell must be designed to elute and recover the gold by re circulation of the eluant until the gold content of the eluted carbon is low enough <100 g/t to be reactivated and returned to the adsorption circuit
Elution chromatography using the column method is widely used to isolate elements prior to TIMS or MC ICP MS analyses For the column method ion exchange resin in its wet form after forming a slurry with water is transferred into a column Figure 2 Once the resin has settled and the water drained the sample mobile phase is added and
·A miniature elution column and eluate holding tank was set u p using cleaned plastic Vo ltic bottles L 750 mL and 500 mL and a 24 L gallon
· up to 30 kgft and copper up to 75 kgft were obtained on the leading column while the gold recoveries averaged 98 per cent over 17 weeks of continuous operation The subsequent elution of loaded carbon in a pilot elution column indicated the use of abnormally high amounts of the pretreatment reagent caustic soda and cyanide used in gold
·Grade 316L Stainless Steel was specified for the Elution Column depicted in the photograph The column is part of the new carbon in pulp plant which has been constructed for the Nigel Municipality to recover gold on a profitable basis from the sediment in the Nigel Dam This sediment has collected in the Dam over the years […]
·Fig 2 Table 11 presents the gold elution curves for the strong equimolar hydroxide pretreatment reagents of potassium hydroxide sodium hydroxide and lithium hydroxide From these results it can be seen that while efficient gold elution can be carried out in the absence of added carbonate the use of potassium hydroxide is
·circulated through a elution column and electrowinning Although simple models exist for the Zadra process Van Deventer and Van der Merwe 1994 developed a generalised model to simulate the more complex AARL process Equilibrium conditions may be assumed in an elution column when adsorption is weak while
The system included a 1500kW Direct Eluate Heating system with full PLC control of all elution process steps plus a 300kg/hr diesel fired regeneration kiln with twin quench tank system The Metso system also introduced the collapsing modular goldroom system which allows modules to be interconnected to make a goldroom of any size to client s
·Operation of the electrowinning process differs depending on the elution procedure that is used In the case of Zadra elution where the electrowinning cell is in series with the elution column the column and cell must be designed to elute and recover the gold by recirculation of the eluant until the gold content of the eluted carbon is low enough <100 g/t
·Elution Process The gold loaded carbon is introduced into an elution column or vessel A hot solution typically a cyanide solution mixed with sodium hydroxide or another suitable eluant is passed through the column The cyanide solution acts to desorb or strip the gold from the surface of the activated carbon
·Anglo American Research Laboratory AARL gold Au elution process has been widely investigated However research into the reaction kinetics of this step is lacking and a set industry standard is yet to be determined pre treatment temperature contact time and reactor conditions reactor design and agitation
·Elution of gold using sulphide solutions Improved rates Q/ elution were obtained at higher sulphide concen trations and pH values greater than about 13 Higher temperatures increased the initial elution rate but lowered the overall extraction dency probablY because Q/the deposition Q/ elemental gold on the carbon Variation Q/the ionic
·The effect of the geometry of the elution column was investigated in Figure 9 The gold elution profiles presented were obtained by performing identical elutions in the glass column and in a stainless steel column which was 300 times larger by volume These columns had h/d ratios of and respectively
·The ZADRA elution circuit at Gold Fields Ghana Limited was designed as a pressure system with an operational pressure set point of 350 kPa It consists of circulating 3% sodium hydroxide water
