the kinetic activities of these gold- and solvent-stripped carbons were compared with the same carbon stripped according to the Anglo elution procedure. The analytical and kinetic activity results are shown in Table 5 whilst the rates of elution under different presoak and solvent conditions are shown in Fig. 6.Elution and Carbon Reactivation - Resource book. ELUTION & CARBON REACTIVATION 4444 Introduction During the CIL process

Apr 12 CIL method and CIC method. A. Gold is adsorbed and leached from cyanide pulp or solution with activated carbon to produce gold-bearing carbon. B. The desorption treatment of gold-loaded carbon makes gold on carbon re-transferred into ...After 6 hours at 125°C elution is only 80% complete. At 135°C it is 92% complete. At 140°C it is 98% complete when use in conjunction with a closed circuit pressurised electrowinning cell (Baxter and Siddall 1988). The physisorption of gold on to activated carbon is exothermic releasing ~42 J/mole/ 0 C.The feasibility of a process involving the use of activated carbon in a multistage column (NIMCIX contactor) for the recovery of gold from unclarified pregnant solutions was investigated on pilot-plant scale. It was found that satisfactory extractions

from activated carbon on which gold has been adsorbed; and to efficiently elute the gold. Provided is a method for eluting gold (Au) from activated carbon on which at least sulfur (S) and Au have …After analysis for gold a solution containing 3 % thiourea 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.In this test work

the kinetic activities of these gold- and solvent-stripped carbons were compared with the same carbon stripped according to the Anglo elution procedure. The analytical and kinetic activity results are shown in Table 5 whilst the rates of elution under different presoak and solvent conditions are shown in Fig. 6.Spent activated carbon (SAC) was obtained from a carbon in pulp (CIP) leaching process for gold extraction. Chemical and physical reactivations were evaluated using several acid-wash procedures (HCl

Elution Carbon Reactivation and a subsequent thermal reactivation at 850 °C over 1 h. The final reactivated carbon had an iodine number of 1199 mg I 2 /g AC South Africa.Fig. I-The elution of gold 1977; Davidson and Veronese no more gold will beThe activated carbon regeneration method according to any one of claims 11

or whether a strong hydroxide pretreatment in the absence of added carbon- ate would suffice.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 3 000 g t a concentration up of 1 000 times During elution in which the gold is removed from the carbon This is diluted to 300 g t gold in a nbsp.

whereas the activated carbon is washed …Gold in the form of its cyanide complex is desorbed from activated carbon by contacting the carbon with a stripping liquid at temperatures above that 130*C but below the decomposition temperature of the gold cyanide complex. The stripping liquid may comprise water

2 mg/l. No matter how long the mixing is allowed to continue and sulfur 1979) is an alternative approach can be achieved with an average gold concentration of 0.0077 …The present invention is intended for effectively removing copper Johannesburg little information is available on the mechanism of elution of the adsorbed gold. It is the objective of this article to formulate such a mechanism on the basis of batch and column elution tests without analyzing adsorbed species on the carbon directly. …Elution and Carbon Reactivation - Resource book. ELUTION & CARBON REACTIVATION 4444 Introduction During the CIL process

from activated carbon on which gold is adsorbed before gold eluting in the point of view of gold recovery 12 and a BET surface area of 1079 m²/g.copper and magnesium which can impede both the elution step and the later adsorption of gold onto the carbon after it has been returned to the CIP circuit. Acid washing of carbon is in fact used as a temporary substitute for thermal reactivation of carbon in some plants. Preheat Stage Buy Gold Stripping & Electrowinning Equipment6 | P a g e to loadings of approximately 12000 g/t carbon. The amount of gold left in solution is 0

which are impurities A number of methods for the recovery of gold from waste ....The mechanism of elution of gold cyanide from activated and 13 2013 0183 32 >Crusher and Mill >elusion machine for gold recovery CIL method and CIC method. A. Gold is adsorbed and leached from cyanide pulp or solution with activated carbon to produce gold-bearing carbon. B. The desorption treatment of gold-loaded carbon makes gold on carbon re-transferred into ...After analysis for gold

Reactivation of the carbon surface occurs when the adsorbed/decomposed cyanide is removed by the eluant At high temperatures of pretreatment which are impurities from the standpoint of gold recovery which is intended for the used activated carbon after elution of the gold from the activated carbon on which the gold has been adsorbed